Sigma rule: Dynamic .NET Compilation Via Csc.EXE - Hunting

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0e7d8d4041ae, updated 2023-08-02T00:00:00.000Z.

Rule

Title
Dynamic .NET Compilation Via Csc.EXE - Hunting
Status
test
Level
medium
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-08-02
File
rules-threat-hunting/windows/process_creation/proc_creation_win_csc_compilation.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects execution of "csc.exe" to compile .NET code. Attackers often leverage this to compile code on the fly and use it in other stages.

Log source

product
windows
category
process_creation

Detection

selection:
    Image|endswith: '\csc.exe'
    CommandLine|contains: '/noconfig /fullpaths @'
condition: selection

False positives (as the rule lists them)

  • Many legitimate applications make use of dynamic compilation. Use this rule to hunt for anomalies

Tags

  • attack.stealth
  • attack.t1027.004
  • detection.threat-hunting

MITRE ATT&CK ids this rule names

Related rules

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-threat-hunting/windows/process_creation/proc_creation_win_csc_compilation.yml

Sources and licences

  • SigmaHQ

    "Dynamic .NET Compilation Via Csc.EXE - Hunting" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-threat-hunting/windows/process_creation/proc_creation_win_csc_compilation.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: Dynamic .NET Compilation Via Csc.EXE - Hunting",
entity page, dataset version ref-0e7d8d4041ae, updated 2023-08-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/acf2807c-805b-4042-aab9-f86b6ba9cb2b (accessed 2026-11-03).
Underlying source: SigmaHQ rule acf2807c-805b-4042-aab9-f86b6ba9cb2b, 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.