Suspicious PIF Payload Assembly via copy /b Binary Concatenation

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1059.003Windows Command Shell
Persistence
Priv Esc
Defense Evasion
- T1027Obfuscated Files or Information
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the cmd copy command using the b binary flag to concatenate files into a pif output. An NSIS delivered Industries batch used copy /b to rebuild an AutoIt pif payload before AsyncRAT injection. Binary concatenation into a pif reassembles a split malicious executable to evade static delivery detection.

Reporting behind it

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Suspicious PIF Payload Assembly via copy /b Binary Concatenation

Pivot detection · T1027 · 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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