ThreatFox: KongTuke IOCs

Hunt Hypothesis

This hunt detects adversary activity involving specific indicators of compromise (IOCs) linked to the KongTuke threat actor, which often targets enterprise environments through malicious file execution and network communication. Proactively hunting for these IOCs in Azure Sentinel is critical because early identification of KongTuke’s presence allows the SOC team to mitigate potential lateral movement and data exfiltration before the adversary establishes a persistent foothold within the organization.

IOC Summary

Malware Family: KongTuke Total IOCs: 2 IOC Types: domain, url

KQL: Domain Hunt

// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - KongTuke
let malicious_domains = dynamic(["tom-rr.top"]);
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 - KongTuke
let malicious_urls = dynamic(["https://tom-rr.top/f"]);
UrlClickEvents
| where Url has_any (malicious_urls)
| project Timestamp, AccountUpn, Url, ActionType, IsClickedThrough
| order by Timestamp desc

Required Data Sources

References

• ThreatFox — KongTuke

False Positive Guidance

Here are 4 specific false positive scenarios for the ThreatFox: KongTuke IOCs detection rule, including suggested filters and exclusions tailored for an enterprise environment:

• Legitimate Scenario: Security Operations Center (SOC) analysts or threat intelligence teams manually importing the latest KongTuke IOC feed into their SIEM or EDR platform via a scheduled import job.

  • Suggested Filter/Exclusion: Create an exclusion based on the source user account being a dedicated service identity (e.g., svc-threat-intel or admin-import) and the process name matching known ingestion tools like Splunk Add-on for Threat Intelligence, Tenable.io, or Microsoft Defender for Endpoint automated feed updates.

• Legitimate Scenario: The IT Operations team running a nightly vulnerability scan using Qualys Cloud Agent or Rapid7 InsightVM, which queries external threat intelligence APIs to enrich asset data with KongTuke indicators before generating reports.

  • Suggested Filter/Exclusion: Exclude alerts where the initiating process is qualys-cloud-agent.exe (or equivalent Rapid7 agents) and the network destination IP belongs to the known Qualys/Rapid7 public CDN ranges, specifically during the scheduled maintenance window (e.g., 02:00 – 04:00 local time).

• Legitimate Scenario: Endpoint protection software (such as CrowdStrike Falcon or SentinelOne) performing an on-demand “Threat Intelligence Update” that synchronizes its local database with the KongTuke IOC repository to ensure real-time detection capabilities.

  • Suggested Filter/Exclusion: Apply a filter that suppresses alerts if the process path contains standard vendor directories (e.g., C:\Program Files\CrowdStrike\ or C:\SentinelOne\SentinelOne\) and the action is identified as “Network