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ThreatFox: VShell IOCs

ioc-hunt HIGH ThreatFox
CommonSecurityLogDeviceNetworkEvents
iocthreatfoxwin-vshell
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: 2026-09-25T11:00:00Z · Confidence: high

Hunt Hypothesis

This rule identifies the presence of VShell, a lightweight web shell often used by adversaries to establish persistent access and execute commands on compromised Azure resources. Proactively hunting for these IOCs allows the SOC team to detect stealthy backdoors that may have been deployed to maintain footholds in the environment before they are leveraged for lateral movement or data exfiltration.

IOC Summary

Malware Family: VShell Total IOCs: 3 IOC Types: ip:port

TypeValueThreat TypeFirst SeenConfidence
ip:port39[.]109[.]126[.]185:12307botnet_cc2026-09-25100%
ip:port81[.]70[.]21[.]248:6667botnet_cc2026-09-25100%
ip:port1[.]94[.]129[.]250:8098botnet_cc2026-09-25100%

KQL: Ip Hunt

// Hunt for network connections to known malicious IPs
// Source: ThreatFox - VShell
let malicious_ips = dynamic(["81.70.21.248", "39.109.126.185", "1.94.129.250"]);
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(["81.70.21.248", "39.109.126.185", "1.94.129.250"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc

Required Data Sources

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

References

False Positive Guidance

Original source: https://threatfox.abuse.ch/browse/malware/win.vshell/