ThreatFox: KongTuke IOCs

Hunt Hypothesis

This detection rule identifies adversary behavior associated with the KongTuke backdoor family, which establishes persistence to facilitate command-and-control communications and sensitive data exfiltration. A proactive hunt is essential within Azure Sentinel to rapidly identify early-stage infections and prevent lateral movement before significant data loss occurs.

IOC Summary

Malware Family: KongTuke Total IOCs: 6 IOC Types: md5_hash, sha256_hash, sha1_hash

Type	Value	Threat Type	First Seen	Confidence
sha1_hash	`4f70d46d66a362d4c0ddc1242443223f20b9ca9c`	payload	2026-08-15	95%
md5_hash	`082587256ff1ecbed29ca78dbfee706d`	payload	2026-08-15	95%
sha256_hash	`5ee2f468fac76514a39aac80f78a48a36a3a6585460017bfccca54e4afeb13c2`	payload	2026-08-15	95%
sha1_hash	`0e555954137d88bde2aac58051f507c1c886e2e6`	payload	2026-08-15	95%
md5_hash	`488e038d75bd71a749dcb98ca5f0006d`	payload	2026-08-15	95%
sha256_hash	`5320d565de984280aed253f7ba82c3a5f9d6a7be23300e746e10c63f2b583cbd`	payload	2026-08-15	95%

KQL: Hash Hunt

// Hunt for files matching known malicious hashes
// Source: ThreatFox - KongTuke
let malicious_hashes = dynamic(["4f70d46d66a362d4c0ddc1242443223f20b9ca9c", "082587256ff1ecbed29ca78dbfee706d", "5ee2f468fac76514a39aac80f78a48a36a3a6585460017bfccca54e4afeb13c2", "0e555954137d88bde2aac58051f507c1c886e2e6", "488e038d75bd71a749dcb98ca5f0006d", "5320d565de984280aed253f7ba82c3a5f9d6a7be23300e746e10c63f2b583cbd"]);
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 Table	Notes
`DeviceFileEvents`	Ensure this data connector is enabled

References

ThreatFox — KongTuke

False Positive Guidance

Here are 5 specific false positive scenarios for the ThreatFox: KongTuke IOCs detection rule in an enterprise environment, along with suggested filters or exclusions:

Scenario: Legitimate Cloud Backup Agent Communication
- Context: Enterprise backup solutions like Veeam Backup & Replication or Rubrik often utilize HTTP/HTTPS connections to external cloud storage endpoints (e.g., AWS S3, Azure Blob) for data exfiltration. These agents may connect to IP addresses or domains that match KongTuke’s known IOCs due to shared infrastructure providers or overlapping certificate authorities.
- Suggested Filter: Create an exclusion rule allowing traffic from the specific backup service accounts (e.g., VeeamTransportService) and whitelisting the destination IP ranges of your primary cloud storage provider, ensuring the user context is a non-interactive system account rather than a standard user session.
Scenario: Scheduled Software Update Mechanisms
- Context: Automated update tools such as Microsoft System Center Configuration Manager (SCCM) or Chocolatey frequently download large payloads from vendor repositories. If the KongTuke rule flags specific SHA-256 hashes of update binaries or the domain names used by these vendors, legitimate nightly patching jobs will trigger alerts.
- Suggested Filter: Implement a time-based exclusion for known update windows (e.g., 01:00–04:00 UTC) and whitelist the specific executable paths involved in the update process (e.g., C:\Program Files\Microsoft Configuration Manager\ccmexec.exe) to prevent detection during routine maintenance cycles.
Scenario: Third-Party Analytics and Telemetry Services
- Context: Business Intelligence tools like Tableau Server, Power BI Gateway, or CRM platforms (e.g., Salesforce) periodically send