Possible noPac sAMAccountName Spoofing via Machine Account Rename

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078.002Domain Accounts
Execution
Persistence
- T1078.002Domain Accounts
Priv Esc
- T1068Exploitation for Privilege Escalation
- T1078.002Domain Accounts
Defense Evasion
- T1078.002Domain Accounts
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a computer account whose sAMAccountName is renamed away from its trailing dollar sign, the core step of the noPac privilege-escalation chain abusing CVE-2021-42278 and CVE-2021-42287. Renaming a machine account to impersonate a domain controller lets an attacker request Kerberos tickets that escalate to Domain Admin.

Reporting behind it

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Possible noPac sAMAccountName Spoofing via Machine Account Rename

Pivot detection · T1068 · 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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