Suspicious Msiexec Execute Arbitrary DLL
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About the rule
Rule Type
Standard
Rule Description
Adversaries may abuse msiexec.exe to proxy execution of malicious payloads. Msiexec.exe is the command-line utility for the Windows Installer and is thus commonly associated with executing installation packages (.msi)
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND (PROCESSNAME endswith "\msiexec.exe" AND COMMANDLINE contains " -y, /y, –y, —y, ―y") AND COMMANDLINE notcontains "\MsiExec.exe" /Y "C:\Program Files\Bonjour\mdnsNSP.dll,\MsiExec.exe" /Y "C:\Program Files (x86)\Bonjour\mdnsNSP.dll,\MsiExec.exe" /Y "C:\Program Files (x86)\Apple Software Update\ScriptingObjectModel.dll,\MsiExec.exe" /Y "C:\Program Files (x86)\Apple Software Update\SoftwareUpdateAdmin.dll,\MsiExec.exe" /Y "C:\Windows\CCM\,\MsiExec.exe" /Y C:\Windows\CCM\,\MsiExec.exe" -Y "C:\Program Files\Bonjour\mdnsNSP.dll,\MsiExec.exe" -Y "C:\Program Files (x86)\Bonjour\mdnsNSP.dll,\MsiExec.exe" -Y "C:\Program Files (x86)\Apple Software Update\ScriptingObjectModel.dll,\MsiExec.exe" -Y "C:\Program Files (x86)\Apple Software Update\SoftwareUpdateAdmin.dll,\MsiExec.exe" -Y "C:\Windows\CCM\,\MsiExec.exe" -Y C:\Windows\CCM"
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
