Self Extraction Directive File Created In Potentially Suspicious Location
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About the rule
Rule Type
Standard
Rule Description
Detects the creation of Self Extraction Directive files (.sed) in a potentially suspicious location. These files are used by the "iexpress.exe" utility in order to create self extracting packages. Attackers were seen abusing this utility and creating PE files with embedded ".sed" entries.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND (FILENAME contains ":\ProgramData\,:\Temp\,:\Windows\System32\Tasks\,:\Windows\Tasks\,:\Windows\Temp\,\AppData\Local\Temp" OR OBJECTNAME contains ":\ProgramData\,:\Temp\,:\Windows\System32\Tasks\,:\Windows\Tasks\,:\Windows\Temp\,\AppData\Local\Temp") AND (FILENAME endswith ".sed" OR OBJECTNAME endswith ".sed") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Joseliyo Sanchez, @Joseliyo_Jstnk
