Techniques › T1555.002 › AN0157
AN0157 Analytic 0157
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects adversaries attempting to attach debuggers or memory dump utilities to credential storage daemons analogous to macOS
securityd. Observes ptrace syscalls, /proc/<pid>/mem access, or gcore dumps against sensitive processes. Correlates anomalies with privilege escalation or credential dumping attempts.</p>- Detects
- T1555.002 Securityd Memory
- Part of
- DET0057 Detect Suspicious Access to securityd Memory for Credential Extraction
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 | ptrace attach | DC0035 Process Access |
| auditd:FILE | /proc/*/mem read attempt | DC0055 File Access |
| auditd:EXECVE | gcore, gdb, strings, hexdump execution | 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 |
|---|---|
MonitoredProcesses | List of credential storage daemons (e.g., securityd, gnome-keyring, kwallet) monitored for memory access attempts |
CorrelationDepth | Defines how many chained events (process execution + syscall + file read) to correlate before raising an alert |
PrivilegeContext | Expected user/group context for processes allowed to access protected memory |