An adversary may rely upon specific actions by a user in order to gain execution. This may be direct code execution, such as when a user opens a malicious executable delivered via Spearphishing Attachment with the icon and apparent extension of a document file. It also may lead to other execution techniques, such as when a user clicks on a link delivered via Spearphishing Link that leads to exploitation of a browser or application vulnerability via Exploitation for Client Execution. While User Execution frequently occurs shortly after Initial Access it may occur at other phases of an intrusion, such as when an adversary places a file in a shared directory or on a user's desktop hoping that a user will click on it.
|APT12||APT12 has attempted to get victims to open malicious Microsoft Word and PDF attachment sent via spearphishing.  |
|APT19||APT19 attempted to get users to launch malicious attachments delivered via spearphishing emails. |
|APT28||APT28 attempted to get users to click on Microsoft Office attachments containing malicious macro scripts.  |
|APT29||APT29 has used various forms of spearphishing attempting to get a user to open links or attachments, including, but not limited to, malicious Microsoft Word documents, .pdf, and .lnk files.  |
|APT32||APT32 has attempted to lure users to execute a malicious dropper delivered via a spearphishing attachment.   |
|APT33||APT33 has lured users to click links to malicious HTML applications delivered via spearphishing emails.  |
|APT37||APT37 has sent spearphishing attachments attempting to get a user to open them. |
|APT39||APT39 has sent spearphishing emails in an attempt to lure users to click on a malicious attachment or link. |
|BRONZE BUTLER||BRONZE BUTLER has attempted to get users to launch malicious Microsoft Word attachments delivered via spearphishing emails. |
|Cardinal RAT||Cardinal RAT lures victims into executing malicious macros embedded within Microsoft Excel documents. |
|Cobalt Group||Cobalt Group has sent emails containing malicious attachments or links that require users to execute a file or macro to infect the victim machine.  |
|Dark Caracal||Dark Caracal makes their malware look like Flash Player, Office, or PDF documents in order to entice a user to click on it. |
|Darkhotel||Darkhotel sent spearphishing emails with malicious attachments that required users to click on an image in the document to drop the malware to disk. |
|DarkHydrus||DarkHydrus has sent malware that required users to hit the enable button in Microsoft Excel to allow an .iqy file to be downloaded.  |
|Dragonfly 2.0||Dragonfly 2.0 has used various forms of spearphishing in attempts to get users to open links or attachments.  |
|Elderwood||Elderwood has leveraged multiple types of spearphishing in order to attempt to get a user to open links and attachments.  |
|Emotet||Emotet has relied upon users clicking on a malicious link or attachment delivered through spearphishing.  |
|FIN4||FIN4 has lured victims to launch malicious attachments and click malicious links delivered via spearphishing emails (often sent from compromised accounts).  |
|FIN7||FIN7 lured victims to double-click on images in the attachments they sent which would then execute the hidden LNK file. |
|FIN8||FIN8 has leveraged both Spearphishing Link and Spearphishing Attachment attempting to gain User Execution.   |
|Gallmaker||Gallmaker sent victims a lure document with a warning that asked victims to “enable content” for execution. |
|Gorgon Group||Gorgon Group attempted to get users to launch malicious Microsoft Office attachments delivered via spearphishing emails. |
|JCry||JCry has achieved execution by luring users to click on a file that appeared to be an Adobe Flash Player update installer. |
|Lazarus Group||Lazarus Group has attempted to get users to launch a malicious Microsoft Word attachment delivered via a spearphishing email. |
|Leviathan||Leviathan has sent spearphishing emails links and attachments attempting to get a user to click. |
|Magic Hound||Magic Hound has attempted to get users to execute malware via social media and spearphishing emails. |
|menuPass||menuPass has attempted to get victims to open malicious files such as Windows Shortcuts (.lnk) and/or Microsoft Office documents, sent via email as part of spearphishing campaigns.     |
|MuddyWater||MuddyWater has attempted to get users to enable macros and launch malicious Microsoft Word documents delivered via spearphishing emails.    |
|Night Dragon||Night Dragon enticed users to click on links in spearphishing emails to download malware. |
|OilRig||OilRig has delivered malicious links and macro-enabled documents that required targets to click the "enable content" button to execute the payload on the system.   |
|Patchwork||Patchwork embedded a malicious macro in a Word document and lured the victim to click on an icon to execute the malware.  |
|PLATINUM||PLATINUM has attempted to get users to open malicious files by sending spearphishing emails with attachments to victims. |
|Rancor||Rancor attempted to get users to click on an embedded macro within a Microsoft Office Excel document to launch their malware. |
|Silence||Silence attempts to get users to launch malicious attachments delivered via spearphishing emails.  |
|SQLRat||SQLRat relies on users clicking on an embedded image to execute the scripts. |
|TA459||TA459 has attempted to get victims to open malicious Microsoft Word attachment sent via spearphishing. |
|TA505||TA505 has used lures to get users to click links in emails and attachments, enable content in malicious attachments, and execute malicious files contained in archives. For example, TA505 makes their malware look like legitimate Microsoft Word documents, .pdf and/or .lnk files.      |
|The White Company||The White Company has used phishing lure documents that trick users into opening them and infecting their computers. |
|TrickBot||TrickBot has attempted to get users to launch a malicious Excel attachment to deliver its payload. |
|Turla||Turla has used spearphishing via a link to get users to download and run their malware. |
|TYPEFRAME||A Word document delivering TYPEFRAME prompts the user to enable macro execution. |
|Execution Prevention||Application whitelisting may be able to prevent the running of executables masquerading as other files.|
|Network Intrusion Prevention||If a link is being visited by a user, network intrusion prevention systems and systems designed to scan and remove malicious downloads can be used to block activity.|
|Restrict Web-Based Content||If a link is being visited by a user, block unknown or unused files in transit by default that should not be downloaded or by policy from suspicious sites as a best practice to prevent some vectors, such as .scr, .exe, .pif, .cpl, etc. Some download scanning devices can open and analyze compressed and encrypted formats, such as zip and rar that may be used to conceal malicious files in Obfuscated Files or Information.|
|User Training||Use user training as a way to bring awareness to common phishing and spearphishing techniques and how to raise suspicion for potentially malicious events.|
Monitor the execution of and command-line arguments for applications that may be used by an adversary to gain Initial Access that require user interaction. This includes compression applications, such as those for zip files, that can be used to Deobfuscate/Decode Files or Information in payloads.
Anti-virus can potentially detect malicious documents and files that are downloaded and execuited on the user's computer. Endpoint sensing or network sensing can potentially detect malicious events once the file is opened (such as a Microsoft Word document or PDF reaching out to the internet or spawning Powershell.exe) for techniques such as Exploitation for Client Execution and Scripting.
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