Techniques › T1222 › AN0835
AN0835 Analytic 0835
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Behavioral sequence of unauthorized privilege escalation via permission modification: (1) chmod/chown/setfacl process execution with suspicious parameters, (2) Targeting of critical system files or unusual permission values, (3) Correlation with non-privileged user context or unusual timing patterns, (4) Follow-on file access indicating successful permission bypass</p>
- Detects
- T1222 File and Directory Permissions Modification
- Part of
- DET0299 Multi-Platform File and Directory Permissions Modification Detection Strategy
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 | syscall in (chmod, fchmod, fchmodat, chown, fchown, fchownat, setxattr, lsetxattr, fsetxattr) | DC0059 File Metadata |
| auditd:PROCTITLE | proctitle contains chmod, chown, setfacl, or attr commands with suspicious parameters | DC0064 Command Execution |
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 |
|---|---|
SuspiciousPermissionValues | Octal permission values that indicate potential malicious intent (default: 777, 755, 4755) |
CriticalPathPatterns | Linux filesystem paths requiring enhanced monitoring (/etc/, /usr/bin/, /home/) |
AuthorizedAdminUsers | User accounts permitted to perform system-level permission modifications |
AnomalyThreshold | Statistical threshold for detecting unusual permission modification frequency |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2022-22960 | VMware Multiple Products | Mapped |