Smoke Loader Bill Trap

Indicators of Compromise

APT Groups

Mitigation

<div><b><font>Smoke Loader</font></b></div><div><font>Smoke Loader is a malicious bot application that can be used to load other malware. Smoke Loader has been seen in the wild since at least 2011 and has included a number of different payloads. It is notorious for its use of deception and self-protection. It also comes with several plug-ins. [1] [2]</font></div><div><font><br></font></div><div><font><b style=""><font>Associated Software Descriptions</font></b><br></font></div><div><table class="table table-bordered table-alternate mt-2" style="box-sizing: border-box; border-collapse: collapse; width: 1367.25px; margin-bottom: 1rem; color: rgb(33, 37, 41); border: 1px solid rgb(223, 223, 223); empty-cells: hide; font-family: Roboto-Regular, sans-serif; font-size: 16px; margin-top: 0.5rem !important; background-color: rgb(242, 242, 242) !important;"><thead style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><th style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;"><font color="#262626"><span style="font-size: 14px; font-weight: 400;">Name</span></font></th><th style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;"><font color="#262626"><span style="font-size: 14px; font-weight: 400;">Description</span></font></th></tr></thead><tbody style="box-sizing: border-box; background: white; color: rgb(57, 67, 76);"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0.75rem; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><font color="#262626"><span style="font-size: 14px;">Dofoil</span></font></td><td style="box-sizing: border-box; padding: 0.75rem; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><font color="#262626"><span style="font-size: 14px;"><span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; background-color: transparent;">[1]</a></span></span>&nbsp;<span id="scite-ref-2-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://cloudblogs.microsoft.com/microsoftsecure/2018/03/07/behavior-monitoring-combined-with-machine-learning-spoils-a-massive-dofoil-coin-mining-campaign/" target="_blank" style="box-sizing: border-box; background-color: transparent;">[2]</a></span></span></span></font></p></td></tr></tbody></table><b><font>Techniques Used</font></b><br></div><div><table class="table techniques-used background table-bordered" style="box-sizing: border-box; border-collapse: collapse; width: 1367.25px; margin-bottom: 1rem; color: rgb(33, 37, 41); border: 1px solid rgb(223, 223, 223); empty-cells: hide; font-family: Roboto-Regular, sans-serif; font-size: 16px;"><thead style="box-sizing: border-box;"><tr style="box-sizing: border-box; border-bottom: 2px solid rgb(222, 226, 230); background: rgb(242, 242, 242);"><th class="p-2" style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;">Domain</th><th class="p-2" style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;">ID</th><th class="p-2" style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;">Name</th><th class="p-2" style="box-sizing: border-box; text-align: inherit; padding: 0.6rem; vertical-align: bottom; border-width: 1px 1px 2px; border-style: solid; border-color: rgb(223, 223, 223) rgb(223, 223, 223) rgb(222, 226, 230); border-image: initial; font-size: 0.9rem;">Use</th></tr></thead><tbody style="box-sizing: border-box;"><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1071" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1071</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1071/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.001</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1071" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Application Layer Protocol</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1071/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Web Protocols</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;uses HTTP for C2.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1547" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1547</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1547/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.001</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1547" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Boot or Logon Autostart Execution</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1547/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Registry Run Keys / Startup Folder</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;adds a Registry Run key for persistence and adds a script in the Startup folder to deploy the payload.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1059" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1059</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1059/005" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.005</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1059" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Command and Scripting Interpreter</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1059/005" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Visual Basic</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;adds a Visual Basic script in the Startup folder to deploy the payload.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1555" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1555</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1555/003" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.003</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1555" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Credentials from Password Stores</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1555/003" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Credentials from Web Browsers</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;searches for credentials stored from web browsers.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="technique enterprise" id="enterprise" style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td colspan="2" style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1140" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1140</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1140" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Deobfuscate/Decode Files or Information</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;deobfuscates its code.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1114" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1114</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1114/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.001</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1114" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Email Collection</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1114/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Local Email Collection</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;searches through Outlook files and directories (e.g., inbox, sent, templates, drafts, archives, etc.).<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="technique enterprise" id="enterprise" style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td colspan="2" style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1083" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1083</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1083" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">File and Directory Discovery</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;recursively searches through directories for files.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="technique enterprise" id="enterprise" style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td colspan="2" style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1105" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1105</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1105" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Ingress Tool Transfer</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;downloads a new version of itself once it has installed. It also downloads additional plugins.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span></p></td></tr><tr class="technique enterprise" id="enterprise" style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td colspan="2" style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1027" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1027</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1027" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Obfuscated Files or Information</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;uses a simple one-byte XOR method to obfuscate values in the malware.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span><span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="technique enterprise" id="enterprise" style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td colspan="2" style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1055" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1055</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1055" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Process Injection</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;injects into the Internet Explorer process.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="sub technique enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: none; border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial; width: 5ex;"></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: none; border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial; width: 5ex;"></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1055/012" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.012</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1055/012" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Process Hollowing</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;spawns a new copy of c:\windows\syswow64\explorer.exe and then replaces the executable code in memory with malware.<span id="scite-ref-1-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.malwarebytes.com/threat-analysis/2016/08/smoke-loader-downloader-with-a-smokescreen-still-alive/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[1]</a></span></span><span id="scite-ref-2-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://cloudblogs.microsoft.com/microsoftsecure/2018/03/07/behavior-monitoring-combined-with-machine-learning-spoils-a-massive-dofoil-coin-mining-campaign/" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[2]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1053" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1053</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1053/005" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.005</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1053" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Scheduled Task/Job</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1053/005" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Scheduled Task</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;launches a scheduled task.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1552" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1552</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1552/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.001</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1552" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Unsecured Credentials</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1552/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Credentials In Files</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;searches for files named logins.json to parse for credentials.<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr><tr class="sub technique noparent enterprise" id="enterprise" style="box-sizing: border-box; border-bottom: 1px solid rgb(223, 223, 223); border-left: none;"><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;">Enterprise</td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border-top: 1px solid rgb(223, 223, 223); border-right: 1px solid rgb(223, 223, 223); border-bottom: none; border-left: 1px solid rgb(223, 223, 223); border-image: initial;"><a href="https://attack.mitre.org/techniques/T1497" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">T1497</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1497/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">.001</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><a href="https://attack.mitre.org/techniques/T1497" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Virtualization/Sandbox Evasion</a>:&nbsp;<a href="https://attack.mitre.org/techniques/T1497/001" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">System Checks</a></td><td style="box-sizing: border-box; padding: 10px; vertical-align: top; border: 1px solid rgb(223, 223, 223);"><p style="box-sizing: border-box; margin-bottom: 0px;"><a href="https://attack.mitre.org/software/S0226" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">Smoke Loader</a>&nbsp;scans processes to perform anti-VM checks.&nbsp;<span id="scite-ref-3-a" class="scite-citeref-number" style="box-sizing: border-box;"><span style="box-sizing: border-box; position: relative; font-size: 12px; line-height: 0; vertical-align: baseline; top: -0.5em;"><a href="https://blog.talosintelligence.com/2018/07/smoking-guns-smoke-loader-learned-new.html#more" target="_blank" style="box-sizing: border-box; color: rgb(79, 124, 172); background-color: transparent;">[3]</a></span></span></p></td></tr></tbody></table></div><div><br></div>