Suspicious Obfuscated Batch Execution via Legacy Command Interpreter (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.003Windows Command Shell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the legacy command.com interpreter spawning cmd.exe to run a batch file from a user-writable directory, a pattern used by CypherIT-packed Lumma loaders. The obfuscated batch stage unpacks and launches the stealer while evading naive command-line inspection.

Reporting behind it

Related detections9 linkedT1059.003 — drag to rearrange

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Malicious ClickFix Execution via Headless Conhost

Suspicious Command Shell Spawned by MSSQL Server Process

Suspicious Named Pipe Creation via Command Echo

Exchange Worker Process Spawning Command Shell via OWASSRF

Suspicious Command Execution via ComSpec Environment Variable Obfuscation

Suspicious File Concatenation via copy Binary Mode

Suspicious Obfuscated Batch Execution via Legacy Command Interpreter (via process_creation)

Pivot detection · T1059.003 · 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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