Remote Access Tool - ScreenConnect Potential Suspicious Remote Command Execution

calendar Aug 12, 2024 · attack.command-and-control attack.t1219  ·
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Detects potentially suspicious child processes launched via the ScreenConnect client service.

Sigma rule (View on GitHub)

 1title: Remote Access Tool - ScreenConnect Potential Suspicious Remote Command Execution
 2id: 7b582f1a-b318-4c6a-bf4e-66fe49bf55a5
 3related:
 4    - id: d1a401ab-8c47-4e86-a7d8-2460b6a53e4a
 5      type: derived
 6status: test
 7description: |
 8        Detects potentially suspicious child processes launched via the ScreenConnect client service.
 9references:
10    - https://www.mandiant.com/resources/telegram-malware-iranian-espionage
11    - https://docs.connectwise.com/ConnectWise_Control_Documentation/Get_started/Host_client/View_menu/Backstage_mode
12    - https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708
13    - https://www.trendmicro.com/en_us/research/24/b/threat-actor-groups-including-black-basta-are-exploiting-recent-.html
14author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems), @Kostastsale
15date: 2022-02-25
16modified: 2024-02-28
17tags:
18    - attack.command-and-control
19    - attack.t1219
20logsource:
21    product: windows
22    category: process_creation
23detection:
24    selection:
25        ParentCommandLine|contains|all:
26            - ':\Windows\TEMP\ScreenConnect\'
27            - 'run.cmd'
28        Image|endswith:
29            - '\bitsadmin.exe'
30            - '\cmd.exe'
31            - '\curl.exe'
32            - '\dllhost.exe'
33            - '\net.exe'
34            - '\nltest.exe'
35            - '\powershell.exe'
36            - '\pwsh.exe'
37            - '\rundll32.exe'
38            - '\wevtutil.exe'
39    condition: selection
40falsepositives:
41    - If the script being executed make use of any of the utilities mentioned in the detection then they should filtered out or allowed.
42level: medium

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