ThreatFox: KongTuke IOCs

Hunt Hypothesis

The ThreatFox: KongTuke IOCs rule detects potential adversary activity associated with the KongTuke threat group, which is linked to malicious network traffic and data exfiltration. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate advanced persistent threats leveraging these IOCs before significant data loss or system compromise occurs.

IOC Summary

Malware Family: KongTuke Total IOCs: 8 IOC Types: domain, url

KQL: Domain Hunt

// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - KongTuke
let malicious_domains = dynamic(["eellner.lol", "schluter.lol"]);
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://eellner.lol/file.js", "https://eellner.lol/api/v1/session", "https://eellner.lol/api/v1/verify", "https://schluter.lol/file.js", "https://schluter.lol/api/v1/session", "https://schluter.lol/api/v1/verify"]);
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

• Scenario: Scheduled System Backup Job
  Description: A legitimate scheduled backup job uses a script that matches one of the KongTuke IOCs (e.g., a command-line tool or script name).
  Filter/Exclusion: Exclude processes initiated by the backup scheduler (e.g., schtasks.exe or at.exe) or check for presence of backup directories (e.g., C:\Backup\).

• Scenario: Admin Task - User Management Script
  Description: An admin runs a script to manage user accounts, which includes a command or file path matching a KongTuke IOC.
  Filter/Exclusion: Exclude processes started by the local administrator account or check for presence of user management tools (e.g., Active Directory Users and Computers).

• Scenario: Log Collection Tool Using Known IOC
  Description: A log collection tool (e.g., Splunk, ELK Stack) uses a known IOC in its configuration or scripts for logging purposes.
  Filter/Exclusion: Exclude processes associated with log collection tools or check for presence of log management directories (e.g., C:\Logs\).

• Scenario: DevOps Pipeline Artifact Download
  Description: A CI/CD pipeline (e.g., Jenkins, GitLab CI) downloads a package or artifact that contains a KongTuke IOC as part of its build process.
  Filter/Exclusion: Exclude processes initiated by CI/CD agents or check for presence of build directories (e.g., C:\Jenkins\workspace\).

• Scenario: Network Monitoring Tool with Known IOC
  Description: A network monitoring tool (e.g., Wireshark, tcpdump) includes a known IOC in its configuration or scripts for packet analysis.
  Filter/Exclusion: Exclude processes associated with network monitoring tools or check for presence of