Sigma rule: Remote CHM File Download/Execution Via HH.EXE
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b7786bde2da3, updated 2024-01-31T00:00:00.000Z.
Rule
- Title
- Remote CHM File Download/Execution Via HH.EXE
- Status
- test
- Level
- high
- Author
- Nasreddine Bencherchali (Nextron Systems)
- Date
- 2022-09-29
- Modified
- 2024-01-31
- File
- rules/windows/process_creation/proc_creation_win_hh_chm_remote_download_or_execution.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects the usage of "hh.exe" to execute/download remotely hosted ".chm" files.
Log source
- product
- windows
- category
- process_creation
Detection
selection_img:
- OriginalFileName: 'HH.exe'
- Image|endswith: '\hh.exe'
selection_cli:
CommandLine|contains:
- 'http://'
- 'https://'
- '\\\\'
condition: all of selection_*False positives (as the rule lists them)
- Unknown
Tags
- attack.stealth
- attack.t1218.001
MITRE ATT&CK ids this rule names
References
- https://www.splunk.com/en_us/blog/security/follina-for-protocol-handlers.html
- https://github.com/redcanaryco/atomic-red-team/blob/1cf4dd51f83dcb0ebe6ade902d6157ad2dbc6ac8/atomics/T1218.001/T1218.001.md
- https://www.zscaler.com/blogs/security-research/unintentional-leak-glimpse-attack-vectors-apt37
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_hh_chm_remote_download_or_execution.yml
Sources and licences
SigmaHQ
"Remote CHM File Download/Execution Via HH.EXE" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_hh_chm_remote_download_or_execution.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: Remote CHM File Download/Execution Via HH.EXE",
entity page, dataset version ref-b7786bde2da3, updated 2024-01-31T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/f57c58b3-ee69-4ef5-9041-455bf39aaa89 (accessed 2026-11-03).
Underlying source: SigmaHQ rule f57c58b3-ee69-4ef5-9041-455bf39aaa89, 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.