Sigma rule: ScreenConnect - SlashAndGrab Exploitation Indicators

Rule

Title

ScreenConnect - SlashAndGrab Exploitation Indicators

Status

test

Level

high

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2024-02-23

File

rules-emerging-threats/2024/TA/SlashAndGrab-Exploitation-In-Wild/file_event_win_apt_unknown_exploitation_indicators.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects indicators of exploitation by threat actors during exploitation of the "SlashAndGrab" vulnerability related to ScreenConnect as reported Team Huntress

Log source

product

windows

category

file_event

Detection

selection:
    - TargetFilename|contains|all:
          - 'C:\Windows\Temp\ScreenConnect\'
          - '\LB3.exe'
    - TargetFilename|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'
condition: selection

False positives (as the rule lists them)

• Unknown

Tags

• detection.emerging-threats
• attack.stealth

References

• https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2024/TA/SlashAndGrab-Exploitation-In-Wild/file_event_win_apt_unknown_exploitation_indicators.yml