Techniques › T1558.004 › AN0316
AN0316 Analytic 0316
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects AS-REP roasting attempts by monitoring for Kerberos AS-REQ/AS-REP authentication patterns where preauthentication is disabled (Event ID 4768 with Pre-Auth Type 0). Correlates these requests with subsequent service ticket activity (Event ID 4769) and anomalies such as requests using weak RC4 encryption (etype 0x17). Excessive enumeration of accounts with 'Do not require Kerberos preauthentication' set in Active Directory is another key detection point.</p>
- Detects
- T1558.004 AS-REP Roasting
- Part of
- DET0113 Detect AS-REP Roasting Attempts (T1558.004)
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:Security | EventCode=4768 | DC0084 Active Directory Credential Request |
| WinEventLog:Sysmon | EventCode=1 | DC0032 Process 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 |
|---|---|
PreAuthDisabledAccountsBaseline | Baseline of accounts legitimately configured without Kerberos preauthentication; deviations may indicate adversary enumeration. |
TGTRequestThreshold | Number of AS-REQ/AS-REP exchanges per account within a short timeframe; higher counts may indicate AS-REP roasting. |
AllowedEncryptionTypes | Permitted Kerberos encryption algorithms; RC4 usage (etype 0x17) should be closely monitored. |
TimeWindow | Correlation window for linking AS-REQs, AS-REPs, and subsequent service ticket requests. |