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ThreatFox: Unknown malware IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceFileEventsDeviceNetworkEventsUrlClickEvents
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: 2026-08-29T11:00:00Z · Confidence: high

Hunt Hypothesis

This hunt detects adversary behavior characterized by the presence of thirteen distinct indicators of compromise (IOCs) linked to previously unidentified malware strains within the Azure Sentinel environment. A SOC team should proactively hunt for these unknown signatures to rapidly identify and contain emerging threats before they establish persistence or propagate laterally across the network.

IOC Summary

Malware Family: Unknown malware Total IOCs: 13 IOC Types: url, ip:port, md5_hash

TypeValueThreat TypeFirst SeenConfidence
ip:port220[.]154[.]128[.]196:9443botnet_cc2026-08-2975%
ip:port45[.]192[.]105[.]141:18317botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:8317botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:3000botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:4000botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:111botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:80botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:8080botnet_cc2026-08-29100%
ip:port45[.]192[.]105[.]141:443botnet_cc2026-08-29100%
md5_hash46db2652a3d7c10f6d481c1d43af6b40payload2026-08-29100%
ip:port45[.]61[.]136[.]135:443payload_delivery2026-08-29100%
ip:port43[.]133[.]164[.]200:7443botnet_cc2026-08-29100%
urlhxxp://165[.]22[.]225[.]110/commandsbotnet_cc2026-08-28100%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Unknown malware
let malicious_ips = dynamic(["43.133.164.200", "45.192.105.141", "220.154.128.196", "45.61.136.135"]);
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(["43.133.164.200", "45.192.105.141", "220.154.128.196", "45.61.136.135"]);
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 - Unknown malware
let malicious_urls = dynamic(["http://165.22.225.110/commands"]);
UrlClickEvents
| where Url has_any (malicious_urls)
| project Timestamp, AccountUpn, Url, ActionType, IsClickedThrough
| order by Timestamp desc

KQL: Hash Hunt

// Hunt for files matching known malicious hashes
// Source: ThreatFox - Unknown malware
let malicious_hashes = dynamic(["46db2652a3d7c10f6d481c1d43af6b40"]);
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
UrlClickEventsEnsure this data connector is enabled

References

False Positive Guidance

Here are 4 specific false positive scenarios for the ThreatFox: Unknown malware IOCs detection rule, along with targeted filtering strategies:

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