sigmahighHunting

HackTool - CobaltStrike BOF Injection Pattern

Detects a typical pattern of a CobaltStrike BOF which inject into other processes

MITRE ATT&CK

executiondefense-evasion

Detection Query

selection:
  CallTrace|re: ^C:\\Windows\\SYSTEM32\\ntdll\.dll\+[a-z0-9]{4,6}\|C:\\Windows\\System32\\KERNELBASE\.dll\+[a-z0-9]{4,6}\|UNKNOWN\([A-Z0-9]{16}\)$
  GrantedAccess:
    - "0x1028"
    - "0x1fffff"
condition: selection

Author

Christian Burkard (Nextron Systems)

Created

2021-08-04

Data Sources

windowsProcess Access Events

Platforms

windows

References

Tags

attack.executionattack.t1106attack.defense-evasionattack.t1562.001

Raw Content

title: HackTool - CobaltStrike BOF Injection Pattern
id: 09706624-b7f6-455d-9d02-adee024cee1d
status: test
description: Detects a typical pattern of a CobaltStrike BOF which inject into other processes
references:
    - https://github.com/boku7/injectAmsiBypass
    - https://github.com/boku7/spawn
author: Christian Burkard (Nextron Systems)
date: 2021-08-04
modified: 2023-11-28
tags:
    - attack.execution
    - attack.t1106
    - attack.defense-evasion
    - attack.t1562.001
logsource:
    category: process_access
    product: windows
detection:
    selection:
        CallTrace|re: '^C:\\Windows\\SYSTEM32\\ntdll\.dll\+[a-z0-9]{4,6}\|C:\\Windows\\System32\\KERNELBASE\.dll\+[a-z0-9]{4,6}\|UNKNOWN\([A-Z0-9]{16}\)$'
        GrantedAccess:
            - '0x1028'
            - '0x1fffff'
    condition: selection
falsepositives:
    - Unknown
level: high