Techniques › T1689 › AN0996
AN0996 Analytic 0996
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Monitors execution of older or legacy interpreters (e.g., python2, bash with restricted history logging), downgrade of TLS/SSL configurations, or forced fallback to unencrypted protocols. Detects suspicious reconfiguration of kernel modules or boot loaders to reduce integrity controls.</p>
- Detects
- T1689 Downgrade Attack
- Part of
- DET0350 Detecting Downgrade Attacks
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 |
|---|---|---|
| auditd:SYSCALL | execve: Execution of downgraded interpreters such as python2 or forced fallback commands | DC0064 Command Execution |
| linux:syslog | Kernel or daemon warnings of downgraded TLS or cryptographic settings | DC0034 Process Metadata |
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 |
|---|---|
AllowedCryptoProtocols | List of TLS/SSL versions approved for use; alerts triggered if older protocols (e.g., TLS 1.0) are used. |