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ThreatFox: PerlBot IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEvents
elf-perlbotiocthreatfox
This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at ThreatFox →
Retrieved: 2026-05-17T23:00:00Z · Confidence: high

Hunt Hypothesis

The ThreatFox: PerlBot IOCs rule detects potential adversary activity associated with the PerlBot malware, which is known for executing malicious payloads and exfiltrating data. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage compromises that could lead to data breaches or persistent threats.

IOC Summary

Malware Family: PerlBot Total IOCs: 5 IOC Types: ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port179[.]43[.]139[.]83:443botnet_cc2026-05-17100%
ip:port209[.]99[.]186[.]7:443botnet_cc2026-05-17100%
ip:port179[.]43[.]139[.]83:80payload_delivery2026-05-17100%
ip:port179[.]43[.]139[.]85:442payload_delivery2026-05-17100%
ip:port179[.]43[.]180[.]84:80payload_delivery2026-05-17100%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - PerlBot
let malicious_ips = dynamic(["179.43.139.83", "209.99.186.7", "179.43.139.85", "179.43.180.84"]);
CommonSecurityLog
| where DestinationIP in (malicious_ips) or SourceIP in (malicious_ips)
| project TimeGenerated, SourceIP, DestinationIP, DestinationPort, DeviceAction, Activity
| order by TimeGenerated desc

KQL: Ip Hunt Device

// Hunt in Defender for Endpoint network events
let malicious_ips = dynamic(["179.43.139.83", "209.99.186.7", "179.43.139.85", "179.43.180.84"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc

Required Data Sources

Sentinel TableNotes
CommonSecurityLogEnsure this data connector is enabled
DeviceNetworkEventsEnsure this data connector is enabled

References

False Positive Guidance

Original source: https://threatfox.abuse.ch/browse/malware/elf.perlbot/