ScreenConnect - SlashAndGrab Exploitation Indicators
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About the rule
Rule Type
Standard
Rule Description
Detects indicators of exploitation by threat actors during exploitation of the "SlashAndGrab" vulnerability related to ScreenConnect as reported Team Huntress
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "File Created or Modified" AND ((FILENAME contains "C:\Windows\Temp\ScreenConnect" AND FILENAME contains "\LB3.exe") OR (OBJECTNAME contains "C:\Windows\Temp\ScreenConnect" AND OBJECTNAME contains "\LB3.exe")) OR (FILENAME contains "C:\mpyutd.msi,C:\perflogs\RunSchedulerTaskOnce.ps1,C:\ProgramData\1.msi,C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\mpyutd.msi,C:\ProgramData\update.dat,C:\Users\oldadmin\Documents\MilsoftConnect\Files\ta.exe,C:\Windows\Help\Help\SentinelAgentCore.dll,C:\Windows\Help\Help\SentinelUI.exe,C:\Windows\spsrv.exe,C:\Windows\Temp\svchost.exe" OR OBJECTNAME contains "C:\mpyutd.msi,C:\perflogs\RunSchedulerTaskOnce.ps1,C:\ProgramData\1.msi,C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\mpyutd.msi,C:\ProgramData\update.dat,C:\Users\oldadmin\Documents\MilsoftConnect\Files\ta.exe,C:\Windows\Help\Help\SentinelAgentCore.dll,C:\Windows\Help\Help\SentinelUI.exe,C:\Windows\spsrv.exe,C:\Windows\Temp\svchost.exe") select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
