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ThreatFox: Cobalt Strike IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEventsUrlClickEvents
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: 2026-07-10T11:00:01Z · Confidence: high

Hunt Hypothesis

This hunt detects adversary behavior characterized by the deployment of Cobalt Strike beacons and their associated infrastructure indicators across the Azure environment. Proactively hunting for these specific IOCs is critical to identify early-stage lateral movement and command-and-control communications before they evolve into full-scale post-exploitation campaigns.

IOC Summary

Malware Family: Cobalt Strike Total IOCs: 21 IOC Types: url, ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port59[.]110[.]23[.]216:443botnet_cc2026-07-10100%
ip:port101[.]42[.]255[.]92:8081botnet_cc2026-07-10100%
ip:port140[.]143[.]239[.]224:8050botnet_cc2026-07-10100%
ip:port119[.]45[.]160[.]160:8080botnet_cc2026-07-10100%
ip:port117[.]72[.]175[.]125:8080botnet_cc2026-07-10100%
ip:port119[.]45[.]160[.]160:443botnet_cc2026-07-10100%
ip:port119[.]45[.]160[.]160:80botnet_cc2026-07-10100%
ip:port114[.]132[.]89[.]132:51443botnet_cc2026-07-10100%
ip:port116[.]198[.]233[.]179:8080botnet_cc2026-07-10100%
ip:port38[.]54[.]61[.]225:80botnet_cc2026-07-1075%
ip:port101[.]34[.]235[.]198:8443botnet_cc2026-07-1075%
urlhxxp://158[.]178[.]230[.]77:7443/3Jmsbotnet_cc2026-07-1075%
ip:port158[.]178[.]230[.]77:7443botnet_cc2026-07-10100%
ip:port8[.]134[.]70[.]73:80botnet_cc2026-07-10100%
ip:port39[.]105[.]201[.]165:8080botnet_cc2026-07-10100%
ip:port39[.]105[.]201[.]165:80botnet_cc2026-07-10100%
ip:port39[.]105[.]201[.]165:443botnet_cc2026-07-10100%
urlhxxp://62[.]234[.]54[.]51:443/ga.jsbotnet_cc2026-07-1075%
urlhxxp://62[.]234[.]54[.]51:443/DCqebotnet_cc2026-07-1075%
ip:port78[.]17[.]212[.]136:443botnet_cc2026-07-0975%
ip:port59[.]110[.]23[.]216:8181botnet_cc2026-07-0975%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Cobalt Strike
let malicious_ips = dynamic(["59.110.23.216", "114.132.89.132", "101.42.255.92", "38.54.61.225", "78.17.212.136", "116.198.233.179", "39.105.201.165", "119.45.160.160", "158.178.230.77", "117.72.175.125", "140.143.239.224", "101.34.235.198", "8.134.70.73"]);
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(["59.110.23.216", "114.132.89.132", "101.42.255.92", "38.54.61.225", "78.17.212.136", "116.198.233.179", "39.105.201.165", "119.45.160.160", "158.178.230.77", "117.72.175.125", "140.143.239.224", "101.34.235.198", "8.134.70.73"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc

KQL: Url Hunt

// Hunt for access to known malicious URLs
// Source: ThreatFox - Cobalt Strike
let malicious_urls = dynamic(["http://158.178.230.77:7443/3Jms", "http://62.234.54.51:443/ga.js", "http://62.234.54.51:443/DCqe"]);
UrlClickEvents
| where Url has_any (malicious_urls)
| project Timestamp, AccountUpn, Url, ActionType, IsClickedThrough
| order by Timestamp desc

Required Data Sources

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

References

False Positive Guidance

Here are specific false positive scenarios for the ThreatFox: Cobalt Strike IOCs rule, including suggested filters and exclusions tailored for an enterprise environment:

Original source: https://threatfox.abuse.ch/browse/malware/win.cobalt_strike/