{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/vendors/kix32/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["AutoIt","AutoHotkey","KIX32"],"_cs_severities":["high"],"_cs_tags":["defense-evasion","execution","masquerading","windows"],"_cs_type":"advisory","_cs_vendors":["AutoIt","AutoHotkey","KIX32"],"content_html":"\u003cp\u003eAttackers often rename legitimate utilities to masquerade their malicious activities and evade detection. This technique is particularly prevalent in malware leveraging scripting languages like AutoIt and AutoHotkey. These scripting tools, designed for automation, can be abused to create and execute malicious scripts. This detection identifies instances where the original filename of a process associated with AutoIt, AutoHotkey, or KIX32 does not match the actual process name, a strong indicator of masquerading. This activity is flagged by comparing the \u003ccode\u003eprocess.pe.original_file_name\u003c/code\u003e and \u003ccode\u003eprocess.name\u003c/code\u003e fields in process creation logs. The detection logic focuses on Windows systems, where these automation tools are commonly used. This matters for defenders because it can help to identify malware that is attempting to hide its true nature.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains initial access to the system (e.g., via phishing or exploiting a vulnerability).\u003c/li\u003e\n\u003cli\u003eMalicious AutoIt or AutoHotkey script is deployed to the system, often dropped in a user's profile directory or a temporary folder.\u003c/li\u003e\n\u003cli\u003eThe attacker renames the AutoIt or AutoHotkey interpreter executable (e.g., from \u003ccode\u003eAutoIt3.exe\u003c/code\u003e to \u003ccode\u003esvchost.exe\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003eThe renamed executable is then used to execute the malicious AutoIt/AutoHotkey script.\u003c/li\u003e\n\u003cli\u003eThe script performs actions such as downloading additional payloads, establishing persistence, or exfiltrating data.\u003c/li\u003e\n\u003cli\u003eThe script might modify registry keys or create scheduled tasks for persistence.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the script to perform lateral movement within the network.\u003c/li\u003e\n\u003cli\u003eThe final objective is achieved, such as data exfiltration or ransomware deployment.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eA successful attack using a renamed scripting interpreter can lead to a wide range of consequences. Attackers can gain persistent access to the system, steal sensitive data, deploy ransomware, or use the compromised system as a foothold for further attacks within the network. Due to the script's ability to interact with the operating system, attackers can perform almost any action a legitimate user can. This can affect various sectors, leading to financial losses, reputational damage, and disruption of operations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Renamed Automation Script Interpreter\u0026quot; to your SIEM to detect the specific masquerading behavior described in this brief.\u003c/li\u003e\n\u003cli\u003eEnable process creation logging with image load events (Sysmon or equivalent) to capture the \u003ccode\u003eprocess.pe.original_file_name\u003c/code\u003e and \u003ccode\u003eprocess.name\u003c/code\u003e attributes, which are critical for this detection.\u003c/li\u003e\n\u003cli\u003eInvestigate any alerts generated by this rule, focusing on the process execution chain and any associated network connections or file modifications as outlined in the rule's \u0026quot;note\u0026quot; section.\u003c/li\u003e\n\u003cli\u003eImplement application control policies to restrict the execution of unauthorized executables in user profile directories and temporary folders.\u003c/li\u003e\n\u003cli\u003eBlock execution of KIX32.EXE from user profile directories and ProgramData.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-09T18:45:00Z","date_published":"2024-01-09T18:45:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-renamed-autoit/","summary":"This rule identifies renamed Automation Script Interpreter processes, often used by malware written in AutoIt/AutoHotKey to evade detection by renaming the executable.","title":"Renamed Automation Script Interpreter Detection","url":"https://feed.craftedsignal.io/briefs/2024-01-renamed-autoit/"}],"language":"en","title":"CraftedSignal Threat Feed - KIX32","version":"https://jsonfeed.org/version/1.1"}