Sigma rule: HackTool - HollowReaper Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b81c711f7e15, updated 2025-07-01T00:00:00.000Z.

Rule

Title
HackTool - HollowReaper Execution
Status
experimental
Level
high
Author
Swachchhanda Shrawan Poudel (Nextron Systems)
Date
2025-07-01
File
rules/windows/process_creation/proc_creation_win_hktl_hollowreaper.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects usage of HollowReaper, a process hollowing shellcode launcher used for stealth payload execution through process hollowing.
It replaces the memory of a legitimate process with custom shellcode, allowing the attacker to execute payloads under the guise of trusted binaries.

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\HollowReaper.exe'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.stealth
  • attack.t1055.012

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_creation/proc_creation_win_hktl_hollowreaper.yml

Sources and licences

  • SigmaHQ

    "HackTool - HollowReaper Execution" by Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_hktl_hollowreaper.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 - HollowReaper Execution",
entity page, dataset version ref-b81c711f7e15, updated 2025-07-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/85d23b42-9a9d-4f8f-b3d7-d2733c1d58f5 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 85d23b42-9a9d-4f8f-b3d7-d2733c1d58f5, 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.