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ThreatFox: Unknown malware IOCs

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

Hunt Hypothesis

This hunt targets adversary behavior characterized by the execution of unknown malware artifacts identified through nine specific Indicators of Compromise (IOCs) that may evade standard signature-based defenses. Proactively hunting for these IOCs within Azure Sentinel is critical to detect early-stage lateral movement or data exfiltration attempts before they escalate into confirmed security incidents.

IOC Summary

Malware Family: Unknown malware Total IOCs: 9 IOC Types: sha256_hash, domain, ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port38[.]207[.]176[.]218:7443botnet_cc2026-07-1075%
ip:port179[.]43[.]149[.]253:7443botnet_cc2026-07-1075%
domainauthorization-press-enter.infopayload_delivery2026-07-10100%
ip:port137[.]220[.]194[.]138:8888botnet_cc2026-07-10100%
ip:port54[.]158[.]27[.]132:31337botnet_cc2026-07-1050%
sha256_hash3ff6b2e928215ef498bd4c0e6157692ca352202a68f4aa01f48bace5b059a5d3payload2026-07-1075%
sha256_hash7c8fc17802ae0c7ffed37f708b50f9184cd2f3c35c52130104eaf32a3e2dc1acpayload2026-07-1075%
ip:port186[.]241[.]104[.]39:8888botnet_cc2026-07-10100%
ip:port101[.]34[.]222[.]38:8080botnet_cc2026-07-09100%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Unknown malware
let malicious_ips = dynamic(["186.241.104.39", "179.43.149.253", "137.220.194.138", "101.34.222.38", "54.158.27.132", "38.207.176.218"]);
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(["186.241.104.39", "179.43.149.253", "137.220.194.138", "101.34.222.38", "54.158.27.132", "38.207.176.218"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc

KQL: Domain Hunt

// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - Unknown malware
let malicious_domains = dynamic(["authorization-press-enter.info"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses, QueryType
| order by TimeGenerated desc

KQL: Hash Hunt

// Hunt for files matching known malicious hashes
// Source: ThreatFox - Unknown malware
let malicious_hashes = dynamic(["3ff6b2e928215ef498bd4c0e6157692ca352202a68f4aa01f48bace5b059a5d3", "7c8fc17802ae0c7ffed37f708b50f9184cd2f3c35c52130104eaf32a3e2dc1ac"]);
DeviceFileEvents
| where SHA256 in (malicious_hashes) or SHA1 in (malicious_hashes) or MD5 in (malicious_hashes)
| project Timestamp, DeviceName, FileName, FolderPath, SHA256, InitiatingProcessFileName
| order by Timestamp desc

Required Data Sources

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

References

False Positive Guidance

Here are 5 specific false positive scenarios for the ThreatFox: Unknown malware IOCs rule, including suggested filters and exclusions tailored for an enterprise environment:

Original source: https://threatfox.abuse.ch/browse/malware/unknown/