Techniques › T1218 › AN0226
AN0226 Analytic 0226
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Execution of trusted, Microsoft-signed binaries such as
rundll32.exe, msiexec.exe, or regsvr32.exe used to execute externally hosted, unsigned, or suspicious payloads through command-line parameters or network retrieval.</p>- Detects
- T1218 System Binary Proxy Execution
- Part of
- DET0081 Detection of Proxy Execution via Trusted Signed Binaries Across Platforms
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=3, 22 | DC0082 Network Connection Creation |
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
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 |
|---|---|
ParentProcessName | Used to profile unexpected parent-child relationships (e.g., regsvr32.exe not launched by explorer.exe) |
SignedBinaryList | List of known signed binaries allowed for execution (e.g., msiexec.exe, regsvr32.exe) |
CommandLineRegex | Regex to match suspicious arguments, such as URLs, script paths, or DLL entrypoints |
RemoteDomainAllowlist | Filter to suppress activity contacting legitimate enterprise domains |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2021-40539 | Zoho ManageEngine | Mapped |
| CVE-2021-44077 | Zoho ManageEngine ServiceDesk Plus (SDP) / SupportCenter Plus | Mapped |