Techniques › T1218 › AN0228
AN0228 Analytic 0228
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Use of system binaries such as
osascript, bash, or curl to download or execute unsigned code or files in conjunction with application proxying.</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 |
|---|---|---|
| macos:unifiedlog | exec of osascript, bash, curl with suspicious parameters | DC0032 Process Creation |
| macos:osquery | execution of trusted tools interacting with external endpoints | 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 |
|---|---|
TrustedUtilityList | macOS binary whitelist including `/usr/bin/osascript`, `/bin/bash`, `/usr/bin/curl` |
SignedToUnsignedTransition | Used to detect proxy execution from signed binary to unsigned payload |
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 |