HackTool - Sliver C2 Implant Activity Pattern

Title: HackTool - Sliver C2 Implant Activity Pattern
Status: test
Description:Detects process activity patterns as seen being used by Sliver C2 framework implants
References:
  -https://github.com/BishopFox/sliver/blob/79f2d48fcdfc2bee4713b78d431ea4b27f733f30/implant/sliver/shell/shell_windows.go#L36
  -https://www.microsoft.com/security/blog/2022/08/24/looking-for-the-sliver-lining-hunting-for-emerging-command-and-control-frameworks/
Author: Nasreddine Bencherchali (Nextron Systems), Florian Roth (Nextron Systems)
Date: 2022-08-25
modified:2023-03-05
Tags:

• -'attack.execution'
• -'attack.t1059'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection:
    CommandLine|contains: '-NoExit -Command [Console]::OutputEncoding=[Text.UTF8Encoding]::UTF8'
  condition:selection
Falsepositives:
  -Unlikely
Level: critical