IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Suspicious .NET Code Compilation
editSuspicious .NET Code Compilation
editIdentifies suspicious .NET code execution. connections.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Defense Evasion
Version: 8 (version history)
Added (Elastic Stack release): 7.10.0
Last modified (Elastic Stack release): 8.4.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guide
editRule query
editprocess where event.type in ("start", "process_started") and
process.name : ("csc.exe", "vbc.exe") and process.parent.name :
("wscript.exe", "mshta.exe", "cscript.exe", "wmic.exe", "svchost.exe",
"rundll32.exe", "cmstp.exe", "regsvr32.exe")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Obfuscated Files or Information
- ID: T1027
- Reference URL: https://attack.mitre.org/techniques/T1027/
Rule version history
edit- Version 8 (8.4.0 release)
-
- Formatting only
- Version 6 (8.2.0 release)
-
- Formatting only
- Version 5 (7.16.0 release)
-
- Formatting only
- Version 4 (7.12.0 release)
-
- Formatting only
- Version 3 (7.11.2 release)
-
- Formatting only
- Version 2 (7.11.0 release)
-
-
Updated query, changed from:
event.category:process and event.type:(start or process_started) and process.name:(csc.exe or vbc.exe) and process.parent.name:(wscript.exe or mshta.exe or wscript.exe or wmic.exe or svchost.exe or rundll32.exe or cmstp.exe or regsvr32.exe)
-