↳ Source GitHubRègle analytiqueMedium
Base64 encoded Windows process command-lines (Normalized Process Events)
Description
'Identifies instances of a base64 encoded PE file header seen in the process command line parameter.
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'
- Type de règle
- Scheduled
- Version
- 1.1.4
- Fréquence
- 1d
- Période analysée
- 1d
- Déclenchement
- gt 0
Couverture MITRE déclarée
Requête KQL
Requête originale, sans modification.
imProcessCreate
| where CommandLine contains "TVqQAAMAAAAEAAA"
| where isnotempty(Process)
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), count() by Dvc, ActorUsername, Process, CommandLine, ActingProcessName, EventVendor, EventProduct
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex
Entités déclarées
Traçabilité de la source
GitHubLes valeurs affichées proviennent des fichiers du dépôt Azure/Azure-Sentinel. Elles décrivent le modèle publié, pas la configuration de votre workspace.
- Commit
7ca9800↗- Identifiant source
f8b3c49c-4087-499b-920f-0dcfaff0cbca
Autres fichiers source 1
Detections/ASimProcess/imProcess_base64_encoded_pefile.yamlsource ↗GSTEP / SUIVI DU CATALOGUE
Ajouté au catalogue : 16 sept. 2026 · 05:49 UTC
Dernier changement observé : 16 sept. 2026 · 05:49 UTC