HackTool - Sliver C2 Implant Activity Pattern

 1title: HackTool - Sliver C2 Implant Activity Pattern
 2id: 42333b2c-b425-441c-b70e-99404a17170f
 3status: test
 4description: Detects process activity patterns as seen being used by Sliver C2 framework implants
 5references:
 6    - https://github.com/BishopFox/sliver/blob/79f2d48fcdfc2bee4713b78d431ea4b27f733f30/implant/sliver/shell/shell_windows.go#L36
 7    - https://www.microsoft.com/security/blog/2022/08/24/looking-for-the-sliver-lining-hunting-for-emerging-command-and-control-frameworks/
 8author: Nasreddine Bencherchali (Nextron Systems), Florian Roth (Nextron Systems)
 9date: 2022/08/25
10modified: 2023/03/05
11tags:
12    - attack.execution
13    - attack.t1059
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        CommandLine|contains: '-NoExit -Command [Console]::OutputEncoding=[Text.UTF8Encoding]::UTF8'
20    condition: selection
21falsepositives:
22    - Unlikely
23level: critical

References

• sliver/implant/sliver/shell/shell_windows.go at 79f2d48fcdfc2bee4713b78d431ea4b27f733f30 · BishopFox/sliver

  

  Adversary Emulation Framework. Contribute to BishopFox/sliver development by creating an account on GitHub.

  
  Read More

• https://www.microsoft.com/security/blog/2022/08/24/looking-for-the-sliver-lining-hunting-for-emerging-command-and-control-frameworks/

  
  Read More

Related rules

• PUA - Wsudo Suspicious Execution
• Potential Dosfuscation Activity
• Python Inline Command Execution
• Suspicious Installer Package Child Process
• Add Potential Suspicious New Download Source To Winget