Files Added To An Archive Using Rar.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects usage of "rar" to add files to an archive for potential compression. An adversary may compress data (e.g. sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.
Severity
Attention
Rule Requirement
Criteria
Action1: actionname = "Process started" AND PROCESSNAME endswith "\rar.exe" AND COMMANDLINE contains " a " select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Timur Zinniatullin, E.M. Anhaus, oscd.community
