Sigma rule: HackTool - CobaltStrike BOF Injection Pattern

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-11f5d86387bf, updated 2023-11-28T00:00:00.000Z.

Rule

Title
HackTool - CobaltStrike BOF Injection Pattern
Status
test
Level
high
Author
Christian Burkard (Nextron Systems)
Date
2021-08-04
Modified
2023-11-28
File
rules/windows/process_access/proc_access_win_hktl_cobaltstrike_bof_injection_pattern.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
process_access

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

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.defense-impairment
  • attack.t1106
  • attack.t1685

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_access/proc_access_win_hktl_cobaltstrike_bof_injection_pattern.yml

Sources and licences

  • SigmaHQ

    "HackTool - CobaltStrike BOF Injection Pattern" by Christian Burkard (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_access/proc_access_win_hktl_cobaltstrike_bof_injection_pattern.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: HackTool - CobaltStrike BOF Injection Pattern",
entity page, dataset version ref-11f5d86387bf, updated 2023-11-28T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/09706624-b7f6-455d-9d02-adee024cee1d (accessed 2026-11-03).
Underlying source: SigmaHQ rule 09706624-b7f6-455d-9d02-adee024cee1d, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.