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ThreatFox: Unknown malware IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEvents
iocthreatfoxunknown
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: 2026-05-10T11:00:00Z · Confidence: high

Hunt Hypothesis

The ThreatFox: Unknown malware IOCs rule detects potential adversary activity involving unknown malicious indicators that may indicate the presence of previously unseen malware in the environment. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate advanced threats that evade traditional detection methods.

IOC Summary

Malware Family: Unknown malware Total IOCs: 3 IOC Types: ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port43[.]133[.]149[.]36:18080botnet_cc2026-05-1075%
ip:port207[.]56[.]2[.]25:7443botnet_cc2026-05-1075%
ip:port175[.]27[.]164[.]136:7443botnet_cc2026-05-1075%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Unknown malware
let malicious_ips = dynamic(["43.133.149.36", "175.27.164.136", "207.56.2.25"]);
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(["43.133.149.36", "175.27.164.136", "207.56.2.25"]);
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/unknown/