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Palo Alto - potential beaconing detected
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Description
'Identifies beaconing patterns from Palo Alto Network traffic logs based on recurrent timedelta patterns.
The query leverages various KQL functions to calculate time deltas and then compares it with total events observed in a day to find percentage of beaconing.
This outbound beaconing pattern to untrusted public networks should be investigated for any malware callbacks or data exfiltration attempts.
Reference Blog:
https://medium.com/@HuntOperator/detect-beaconing-with-flare-elastic-stack-and-intrusion-detection-systems-110dc74e0c56
https://techcommunity.microsoft.com/t5/microsoft-sentinel-blog/detect-network-beaconing-via-intra-request-time-delta-patterns/ba-p/779586'
- Type de règle
- Scheduled
- Version
- 1.0.7
- Statut déclaré
- Available
- Fréquence
- 1d
- Période analysée
- 2d
- Déclenchement
- gt 0
Couverture MITRE déclarée
Sources déclarées
Métadonnées du fichier source. Aucune dépendance déduite du KQL.
Connecteurs
Types de données
Requête KQL
Requête originale, sans modification.
let starttime = 2d;
let endtime = 1d;
let TimeDeltaThreshold = 25;
let TotalEventsThreshold = 30;
let MostFrequentTimeDeltaThreshold = 25;
let PercentBeaconThreshold = 80;
CommonSecurityLog
| where DeviceVendor == "Palo Alto Networks" and Activity == "TRAFFIC"
| where TimeGenerated between (startofday(ago(starttime))..startofday(ago(endtime)))
| where ipv4_is_private(DestinationIP)== false
| project TimeGenerated, DeviceName, SourceUserID, SourceIP, SourcePort, DestinationIP, DestinationPort, ReceivedBytes, SentBytes
| sort by SourceIP asc,TimeGenerated asc, DestinationIP asc, DestinationPort asc
| serialize
| extend nextTimeGenerated = next(TimeGenerated, 1), nextSourceIP = next(SourceIP, 1)
| extend TimeDeltainSeconds = datetime_diff('second',nextTimeGenerated,TimeGenerated)
| where SourceIP == nextSourceIP
//Whitelisting criteria/ threshold criteria
| where TimeDeltainSeconds > TimeDeltaThreshold
| summarize count(), sum(ReceivedBytes), sum(SentBytes)
by TimeDeltainSeconds, bin(TimeGenerated, 1h), DeviceName, SourceUserID, SourceIP, DestinationIP, DestinationPort
| summarize (MostFrequentTimeDeltaCount, MostFrequentTimeDeltainSeconds) = arg_max(count_, TimeDeltainSeconds), TotalEvents=sum(count_), TotalSentBytes = sum(sum_SentBytes), TotalReceivedBytes = sum(sum_ReceivedBytes)
by bin(TimeGenerated, 1h), DeviceName, SourceUserID, SourceIP, DestinationIP, DestinationPort
| where TotalEvents > TotalEventsThreshold and MostFrequentTimeDeltaCount > MostFrequentTimeDeltaThreshold
| extend BeaconPercent = MostFrequentTimeDeltaCount/toreal(TotalEvents) * 100
| where BeaconPercent > PercentBeaconThreshold
Entités déclarées
Contenus associés
Liens établis à partir des identifiants déclarés et des manifests des solutions.
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
f0be259a-34ac-4946-aa15-ca2b115d5feb
GSTEP / SUIVI DU CATALOGUE
Ajouté au catalogue : 16 sept. 2026 · 05:49 UTC
Dernier changement observé : 16 sept. 2026 · 05:49 UTC