Sigma rule: JScript Compiler Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-acc2e1ebcd89, updated 2024-04-24T00:00:00.000Z.

Rule

Title
JScript Compiler Execution
Status
test
Level
low
Author
frack113
Date
2022-05-02
Modified
2024-04-24
File
rules/windows/process_creation/proc_creation_win_jsc_execution.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the execution of the "jsc.exe" (JScript Compiler).
Attacker might abuse this in order to compile JScript files on the fly and bypassing application whitelisting.

Log source

product
windows
category
process_creation

Detection

selection:
    - Image|endswith: '\jsc.exe'
    - OriginalFileName: 'jsc.exe'
condition: selection

False positives (as the rule lists them)

  • Legitimate use to compile JScript by developers.

Tags

  • attack.execution
  • attack.stealth
  • attack.t1127

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_jsc_execution.yml

Sources and licences

  • SigmaHQ

    "JScript Compiler Execution" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_jsc_execution.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: JScript Compiler Execution",
entity page, dataset version ref-acc2e1ebcd89, updated 2024-04-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/52788a70-f1da-40dd-8fbd-73b5865d6568 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 52788a70-f1da-40dd-8fbd-73b5865d6568, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.