File Download Via InstallUtil.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects use of .NET InstallUtil.exe in order to download arbitrary files. The files will be written to "%LOCALAPPDATA%\\Microsoft\\Windows\\INetCache\\IE\\"
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PROCESSNAME endswith "\InstallUtil.exe" OR ORIGINALFILENAME = "InstallUtil.exe") AND COMMANDLINE contains "ftp://,http://,https://" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
