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ThreatFox: Mirai IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEventsUrlClickEvents
elf-miraiiocthreatfox
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: 2026-08-11T23:00:01Z · Confidence: high

Hunt Hypothesis

This detection rule identifies network traffic exhibiting signatures of the Mirai botnet, specifically targeting known indicators of compromise such as command-and-control communications and vulnerable IoT device interactions. Proactively hunting for these behaviors in Azure Sentinel is critical to rapidly isolate compromised endpoints before they are leveraged in large-scale DDoS attacks or lateral movement campaigns within the organization’s cloud infrastructure.

IOC Summary

Malware Family: Mirai Total IOCs: 11 IOC Types: url, ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port176[.]65[.]139[.]244:1337botnet_cc2026-08-1180%
urlhxxp://77[.]90[.]185[.]66/wgetpayload_delivery2026-08-1150%
urlhxxp://77[.]90[.]185[.]66/mirai.mipspayload_delivery2026-08-1150%
urlhxxp://77[.]90[.]185[.]66/mirai.mpslpayload_delivery2026-08-1150%
urlhxxp://77[.]90[.]185[.]66/mirai.armpayload_delivery2026-08-1150%
urlhxxp://77[.]90[.]185[.]66/mirai.arm5payload_delivery2026-08-1150%
urlhxxp://77[.]90[.]185[.]66/mirai.arm7payload_delivery2026-08-1150%
ip:port62[.]84[.]172[.]106:8033botnet_cc2026-08-11100%
ip:port217[.]217[.]243[.]76:8033botnet_cc2026-08-11100%
ip:port103[.]27[.]78[.]14:8033botnet_cc2026-08-11100%
ip:port176[.]65[.]139[.]236:1337botnet_cc2026-08-1180%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - Mirai
let malicious_ips = dynamic(["62.84.172.106", "217.217.243.76", "176.65.139.236", "103.27.78.14", "176.65.139.244"]);
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(["62.84.172.106", "217.217.243.76", "176.65.139.236", "103.27.78.14", "176.65.139.244"]);
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 - Mirai
let malicious_urls = dynamic(["http://77.90.185.66/wget", "http://77.90.185.66/mirai.mips", "http://77.90.185.66/mirai.mpsl", "http://77.90.185.66/mirai.arm", "http://77.90.185.66/mirai.arm5", "http://77.90.185.66/mirai.arm7"]);
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 5 specific false positive scenarios for the ThreatFox: Mirai IOCs detection rule, tailored to a legitimate enterprise environment:

Original source: https://threatfox.abuse.ch/browse/malware/elf.mirai/