Techniques › T1218.001 › AN0968
AN0968 Analytic 0968
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Execution of hh.exe to open a .chm file followed by suspicious child processes or script engine invocation (VBScript, JScript, mshta, powershell). Behavior includes loading a CHM file from untrusted locations, or immediately spawning commands indicative of payload execution.</p>
- Detects
- T1218.001 Compiled HTML File
- Part of
- DET0342 Detection of Suspicious Compiled HTML File Execution via hh.exe
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
| WinEventLog:Sysmon | EventCode=3, 22 | DC0082 Network Connection Creation |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
CHMPathRegex | Regex matching CHM file locations; tune to exclude trusted internal software help files |
ChildProcessList | List of suspicious children of hh.exe (powershell.exe, cmd.exe, mshta.exe, wscript.exe) |
NetworkDestinationAllowlist | Filter for legitimate update/help servers accessed by hh.exe |
TimeWindow | Threshold time between hh.exe execution and suspicious follow-on activity |