Suspicious Code of Conduct Phishing Email From cocinternal.com Sender (via m365)

ATT&CK techniques

Initial Access → Collection

Recon
Resource Dev
Initial Access
- T1566.001Spearphishing Attachment
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1557Adversary-in-the-Middle
Discovery
Lateral Movement
Collection
- T1557Adversary-in-the-Middle
C2
Exfiltration
Impact

What it detects

This rule detects inbound email from the cocinternal.com sender infrastructure used in the multi-stage code of conduct phishing campaign that lures recipients into an adversary-in-the-middle page capturing Microsoft sign-in tokens. Adversaries theme these messages around a corporate code of conduct to prompt urgent sign-in, so mail originating from this sender domain warrants review as the entry point to token compromise.

Reporting behind it

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Suspicious Code of Conduct Phishing Email From cocinternal.com Sender (via m365)

Pivot detection · T1557 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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