Detectionhightest
HTML Help HH.EXE Suspicious Child Process
Detects a suspicious child process of a Microsoft HTML Help (HH.exe)
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Launch
Maxim Pavlunin, Nasreddine Bencherchali (Nextron Systems)Created Wed Apr 01Updated Wed Apr 1252cad028-0ff0-4854-8f67-d25dfcbc78b4windows
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 Logic1 selector
detection:
selection:
ParentImage|endswith: '\hh.exe'
Image|endswith:
- '\CertReq.exe'
- '\CertUtil.exe'
- '\cmd.exe'
- '\cscript.exe'
- '\installutil.exe'
- '\MSbuild.exe'
- '\MSHTA.EXE'
- '\msiexec.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\regsvr32.exe'
- '\rundll32.exe'
- '\schtasks.exe'
- '\wmic.exe'
- '\wscript.exe'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Techniques
Rule Metadata
Rule ID
52cad028-0ff0-4854-8f67-d25dfcbc78b4
Status
test
Level
high
Type
Detection
Created
Wed Apr 01
Modified
Wed Apr 12
Path
rules/windows/process_creation/proc_creation_win_hh_html_help_susp_child_process.yml
Raw Tags
attack.defense-evasionattack.executionattack.initial-accessattack.t1047attack.t1059.001attack.t1059.003attack.t1059.005attack.t1059.007attack.t1218attack.t1218.001attack.t1218.010attack.t1218.011attack.t1566attack.t1566.001