Compressed File Creation Via Tar.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects execution of "tar.exe" in order to create a compressed file. Adversaries may abuse various utilities to compress or encrypt data before exfiltration.
Severity
Attention
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND (PROCESSNAME endswith "\tar.exe" OR ORIGINALFILENAME = "bsdtar") AND COMMANDLINE contains "-c,-r,-u"
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
Nasreddine Bencherchali (Nextron Systems), AdmU3
