ThreatFox: PureRAT IOCs | SOC Hunt Feed

Hunt Hypothesis

This hunt detects adversary behavior involving the deployment of PureRAT remote access tools by matching network and endpoint telemetry against a curated set of 26 specific Indicators of Compromise (IOCs). A SOC team should proactively hunt for these signals in Azure Sentinel to identify early-stage lateral movement or command-and-control activity that may evade standard signature-based detections due to the tool’s legitimate appearance.

IOC Summary

Malware Family: PureRAT Total IOCs: 26 IOC Types: ip:port

Type	Value	Threat Type	First Seen	Confidence
ip:port	`72[.]14[.]136[.]55:56001`	botnet_cc	2026-08-09	75%
ip:port	`72[.]14[.]136[.]55:56002`	botnet_cc	2026-08-09	75%
ip:port	`72[.]14[.]136[.]55:56003`	botnet_cc	2026-08-09	75%
ip:port	`209[.]99[.]190[.]23:55010`	botnet_cc	2026-08-09	75%
ip:port	`185[.]247[.]208[.]91:55555`	botnet_cc	2026-08-09	75%
ip:port	`172[.]252[.]172[.]33:56001`	botnet_cc	2026-08-09	75%
ip:port	`172[.]252[.]172[.]33:56002`	botnet_cc	2026-08-09	75%
ip:port	`172[.]252[.]172[.]29:443`	botnet_cc	2026-08-09	75%
ip:port	`172[.]252[.]172[.]30:443`	botnet_cc	2026-08-09	75%
ip:port	`172[.]252[.]172[.]31:443`	botnet_cc	2026-08-09	75%
ip:port	`172[.]245[.]136[.]99:56001`	botnet_cc	2026-08-09	75%
ip:port	`172[.]245[.]136[.]99:56002`	botnet_cc	2026-08-09	75%
ip:port	`172[.]245[.]136[.]99:56003`	botnet_cc	2026-08-09	75%
ip:port	`168[.]222[.]251[.]83:56012`	botnet_cc	2026-08-09	75%
ip:port	`105[.]108[.]109[.]255:443`	botnet_cc	2026-08-09	75%
ip:port	`207[.]189[.]18[.]213:56003`	botnet_cc	2026-08-08	75%
ip:port	`172[.]252[.]172[.]33:443`	botnet_cc	2026-08-08	75%
ip:port	`157[.]10[.]52[.]2:56003`	botnet_cc	2026-08-08	75%
ip:port	`151[.]242[.]170[.]219:56003`	botnet_cc	2026-08-08	75%
ip:port	`125[.]62[.]77[.]141:56002`	botnet_cc	2026-08-08	75%
ip:port	`125[.]62[.]77[.]141:56003`	botnet_cc	2026-08-08	75%
ip:port	`112[.]121[.]176[.]3:56003`	botnet_cc	2026-08-08	75%
ip:port	`112[.]121[.]176[.]4:56003`	botnet_cc	2026-08-08	75%
ip:port	`112[.]121[.]176[.]5:56003`	botnet_cc	2026-08-08	75%
ip:port	`112[.]121[.]176[.]6:56003`	botnet_cc	2026-08-08	75%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - PureRAT
let malicious_ips = dynamic(["112.121.176.5", "172.245.136.99", "185.247.208.91", "72.14.136.55", "104.239.66.95", "209.99.190.23", "172.252.172.30", "112.121.176.6", "168.222.251.83", "151.242.170.219", "172.252.172.29", "172.252.172.31", "112.121.176.3", "112.121.176.4", "157.10.52.2", "105.108.109.255", "172.252.172.33", "207.189.18.213", "125.62.77.141"]);
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(["112.121.176.5", "172.245.136.99", "185.247.208.91", "72.14.136.55", "104.239.66.95", "209.99.190.23", "172.252.172.30", "112.121.176.6", "168.222.251.83", "151.242.170.219", "172.252.172.29", "172.252.172.31", "112.121.176.3", "112.121.176.4", "157.10.52.2", "105.108.109.255", "172.252.172.33", "207.189.18.213", "125.62.77.141"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc

Required Data Sources

Sentinel Table	Notes
`CommonSecurityLog`	Ensure this data connector is enabled
`DeviceNetworkEvents`	Ensure this data connector is enabled

References

ThreatFox — PureRAT

False Positive Guidance

Here are specific false positive scenarios and corresponding filters for the ThreatFox: PureRAT IOCs detection rule in an enterprise environment:

Scenario: Security Tooling Communication
- Context: Enterprise Endpoint Detection and Response (EDR) agents, such as CrowdStrike Falcon, Microsoft Defender for Endpoint, or Carbon Black, frequently communicate with their respective cloud management consoles. These agents often utilize shared IP ranges or domain names that overlap with the PureRAT IOCs, particularly if the threat intelligence feed includes generic infrastructure IPs used by major vendors.
- Filter/Exclusion: Create a whitelist rule excluding traffic from known EDR agent processes (e.g., C:\Program Files\CrowdStrike\fs_qrte.exe or C:\Windows\System32\DPSvc.exe) connecting to the specific IP ranges identified as PureRAT infrastructure. Additionally, exclude the specific domain names of your internal security management console if they match the IOC list.
Scenario: Scheduled Backup and Maintenance Jobs
- Context: Automated backup solutions like Veeam, Rubrik, or Commvault often run scheduled tasks during off-hours to connect to remote repositories or cloud storage gateways. If PureRAT IOCs include IP addresses belonging to public cloud providers (e.g., AWS, Azure) or specific CDN nodes used by these backup vendors, legitimate backup traffic will trigger the alert.
- Filter/Exclusion: Implement a time-based exclusion for alerts generated between 02:00 and 06:00 local time originating from known backup service accounts (e.g., NT SERVICE\VeeamTransport). Alternatively, exclude specific process paths associated with your primary backup software when the destination matches the PureRAT IP list.
Scenario: Software Deployment and Patching
- Context: IT administrators