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ThreatFox: Unknown malware IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEventsDnsEventsUrlClickEvents
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: 2026-07-16T11:00:00Z · Confidence: high

Hunt Hypothesis

This hypothesis posits that adversaries are actively deploying unknown malware variants within the Azure environment, evidenced by the presence of eight distinct indicators of compromise (IOCs) flagged by ThreatFox. Proactive hunting for these specific IOCs is critical to identify and contain early-stage infections before they escalate into widespread incidents, ensuring rapid response in a high-severity threat landscape.

IOC Summary

Malware Family: Unknown malware Total IOCs: 8 IOC Types: domain, ip:port, url

TypeValueThreat TypeFirst SeenConfidence
ip:port152[.]42[.]185[.]244:22botnet_cc2026-07-16100%
ip:port85[.]120[.]217[.]235:7443botnet_cc2026-07-1675%
ip:port209[.]99[.]189[.]225:7443botnet_cc2026-07-1675%
ip:port192[.]142[.]37[.]30:7443botnet_cc2026-07-1675%
ip:port109[.]123[.]230[.]199:7443botnet_cc2026-07-1675%
ip:port109[.]123[.]230[.]199:8443botnet_cc2026-07-1675%
domain2d4e5f6-7a8b-4c2d-9e1f-3b5a7c8d9e0fc.s3.us-east-1.amazonaws.combotnet_cc2026-07-1675%
urlhxxps://teambluewhitezuerich.ch/payload_delivery2026-07-1690%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Unknown malware
let malicious_ips = dynamic(["85.120.217.235", "209.99.189.225", "192.142.37.30", "109.123.230.199", "152.42.185.244"]);
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(["85.120.217.235", "209.99.189.225", "192.142.37.30", "109.123.230.199", "152.42.185.244"]);
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(["2d4e5f6-7a8b-4c2d-9e1f-3b5a7c8d9e0fc.s3.us-east-1.amazonaws.com"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses, QueryType
| order by TimeGenerated desc

KQL: Url Hunt

// Hunt for access to known malicious URLs
// Source: ThreatFox - Unknown malware
let malicious_urls = dynamic(["https://teambluewhitezuerich.ch/"]);
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
DnsEventsEnsure this data connector is enabled
UrlClickEventsEnsure 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/