Techniques › T1573.002 › AN1496
AN1496 Analytic 1496
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Processes not typically associated with encryption loading asymmetric crypto libraries (e.g., rsaenh.dll, crypt32.dll) and subsequently initiating outbound TLS/SSL connections with abnormal certificate chains or handshakes. Defender correlates process creation, module load, and unusual encrypted sessions.</p>
- Detects
- T1573.002 Asymmetric Cryptography
- Part of
- DET0543 Detection Strategy for Encrypted Channel via Asymmetric Cryptography across OS 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 |
|---|---|---|
| WinEventLog:Sysmon | EventCode=7 | DC0016 Module Load |
| WinEventLog:Sysmon | EventCode=3, 22 | 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 |
|---|---|
AllowedCryptoProcesses | Whitelist browsers, mail clients, or apps expected to use asymmetric crypto. |
CertificateAuthorityList | Baseline CA list for validating abnormal certs. |
HandshakeTimeout | Detection of incomplete or malformed handshakes. |