Suspicious Hidden Local Account Creation via Net User by UAT-8099

ATT&CK techniques

Persistence

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1136.001Local Account
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of a local account whose name ends with a dollar sign which hides it from standard enumeration. UAT-8099 creates hidden accounts such as admin and mysql with a trailing dollar sign for stealthy persistence. Hidden accounts let an actor retain access while evading routine account audits.

Reporting behind it

Related detections9 linkedT1136.001 — drag to rearrange

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Suspicious Hidden Backdoor Account Creation Ending With Dollar Sign (via process_creation)

Malicious User Creation via Commandline (via process_creation)

Suspicious Local Account Creation and Privileged Group Addition via Net.EXE (via process_creation)

Suspicious Hidden Local Account Creation via Dscl (via process_creation)

Suspicious Local Account Creation on Linux (via process_creation)

Possible Atlassian Confluence CVE-2023-22518 Setup-Restore Exploitation via Webserver (via webserver)

Suspicious Hidden Local Account Creation via Net User by UAT-8099

Pivot detection · T1136.001 · 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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