Techniques › T1091 › AN0841
AN0841 Analytic 0841
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Execution of files originating from removable media after drive mount, with correlation to file write activity, autorun usage, or lateral spread via staged tools.</p>
- Detects
- T1091 Replication Through Removable Media
- Part of
- DET0301 Removable Media Execution Chain Detection via File and Process Activity
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:System | EventCode=1006 | DC0042 Drive Creation |
| WinEventLog:Sysmon | EventCode=11 | DC0039 File Creation |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process Creation |
| WinEventLog:Microsoft-Windows-Windows Defender/Operational | Suspicious file execution on removable media path | DC0055 File Access |
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 |
|---|---|
DriveLetterMatch | Detect activity on mounted drives typically used by USB (e.g., E:, F:, G:). Tune based on enterprise usage. |
FileExecutionWindow | Set timing threshold for execution shortly after drive mount (e.g., < 5 minutes). |
ParentProcess | Restrict detection to suspicious process lineage like explorer.exe, powershell.exe, or unsigned binaries. |
FileEntropy | Use entropy thresholding to detect packed/obfuscated payloads dropped to removable media. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2024-50302 | Linux Kernel | Mapped |
| CVE-2024-53104 | Linux Kernel | Mapped |
| CVE-2024-53150 | Linux Kernel | Mapped |
| CVE-2024-53197 | Linux Kernel | Mapped |
| CVE-2025-24985 | Microsoft Windows | Mapped |
| CVE-2025-24991 | Microsoft Windows | Mapped |