Remote File Download Via Findstr.EXE
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About the rule
Rule Type
Standard
Rule Description
Detects execution of "findstr" with specific flags and a remote share path. This specific set of CLI flags would allow "findstr" to download the content of the file located on the remote share as described in the LOLBAS entry.
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (COMMANDLINE contains "findstr" OR PROCESSNAME endswith "findstr.exe" OR ORIGINALFILENAME = "FINDSTR.EXE") AND (COMMANDLINE contains " -v , /v , –v , —v , ―v " AND COMMANDLINE contains " -l , /l , –l , —l , ―l " AND COMMANDLINE contains "\") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Furkan CALISKAN, @caliskanfurkan_, @oscd_initiative, Nasreddine Bencherchali (Nextron Systems)
