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ThreatFox: Cobalt Strike IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEvents
cobalt-strikeiocthreatfoxwin-cobalt_strike
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: 2026-09-13T11:00:00Z · Confidence: high

Hunt Hypothesis

This hypothesis targets the presence of known Cobalt Strike indicators of compromise, which adversaries deploy to establish persistent command and control channels and facilitate lateral movement within the network. Proactively hunting for these IOCs in Azure Sentinel allows the SOC team to identify and isolate compromised assets before the threat actor can escalate privileges or exfiltrate sensitive data.

IOC Summary

Malware Family: Cobalt Strike Total IOCs: 20 IOC Types: ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port43[.]155[.]246[.]58:443botnet_cc2026-09-13100%
ip:port43[.]155[.]246[.]58:8080botnet_cc2026-09-13100%
ip:port43[.]155[.]246[.]58:22botnet_cc2026-09-13100%
ip:port43[.]166[.]202[.]32:80botnet_cc2026-09-13100%
ip:port38[.]76[.]190[.]209:3306botnet_cc2026-09-13100%
ip:port189[.]24[.]79[.]40:8112botnet_cc2026-09-1350%
ip:port156[.]254[.]20[.]46:5996botnet_cc2026-09-1350%
ip:port156[.]254[.]20[.]46:5998botnet_cc2026-09-1350%
ip:port83[.]229[.]123[.]249:8443botnet_cc2026-09-13100%
ip:port83[.]229[.]123[.]249:54321botnet_cc2026-09-13100%
ip:port49[.]233[.]202[.]218:7878botnet_cc2026-09-1375%
ip:port5[.]104[.]86[.]108:8089botnet_cc2026-09-1375%
ip:port38[.]76[.]190[.]209:8787botnet_cc2026-09-13100%
ip:port38[.]76[.]190[.]209:7500botnet_cc2026-09-13100%
ip:port38[.]76[.]190[.]209:8080botnet_cc2026-09-13100%
ip:port38[.]76[.]190[.]209:22botnet_cc2026-09-13100%
ip:port38[.]76[.]190[.]209:80botnet_cc2026-09-12100%
ip:port38[.]76[.]190[.]209:7000botnet_cc2026-09-12100%
ip:port38[.]76[.]190[.]209:443botnet_cc2026-09-12100%
ip:port59[.]110[.]153[.]133:22botnet_cc2026-09-12100%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Cobalt Strike
let malicious_ips = dynamic(["43.166.202.32", "59.110.153.133", "83.229.123.249", "189.24.79.40", "38.76.190.209", "43.155.246.58", "5.104.86.108", "156.254.20.46", "49.233.202.218"]);
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(["43.166.202.32", "59.110.153.133", "83.229.123.249", "189.24.79.40", "38.76.190.209", "43.155.246.58", "5.104.86.108", "156.254.20.46", "49.233.202.218"]);
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/win.cobalt_strike/