Malicious Wscript Executing Temp File as JavaScript (via process_creation)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.007JavaScript
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects wscript or cscript invoking the JavaScript engine against a file with a tmp extension, the execution behavior of a Konni AsyncRAT chain that runs 83972.tmp as JavaScript from ProgramData. Adversaries leverage the engine override switch to run script content from a mismatched temp extension while evading extension based controls, making early detection critical for surfacing the scripting stage before further payload execution.

Reporting behind it

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Malicious Wscript Executing Temp File as JavaScript (via process_creation)

Pivot detection · T1059.007 · 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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