Detectionhightest
Remote CHM File Download/Execution Via HH.EXE
Detects the usage of "hh.exe" to execute/download remotely hosted ".chm" files.
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Nasreddine Bencherchali (Nextron Systems)Created Thu Sep 29Updated Wed Jan 31f57c58b3-ee69-4ef5-9041-455bf39aaa89windows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- OriginalFileName: 'HH.exe'
- Image|endswith: '\hh.exe'
selection_cli:
CommandLine|contains:
- 'http://'
- 'https://'
- '\\\\'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
f57c58b3-ee69-4ef5-9041-455bf39aaa89
Status
test
Level
high
Type
Detection
Created
Thu Sep 29
Modified
Wed Jan 31
Path
rules/windows/process_creation/proc_creation_win_hh_chm_remote_download_or_execution.yml
Raw Tags
attack.defense-evasionattack.t1218.001