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 these IOCs in Azure Sentinel to identify and mitigate early-stage compromises and prevent lateral movement within the network.

IOC Summary

Malware Family: KongTuke Total IOCs: 9 IOC Types: domain, url

KQL: Domain Hunt

// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - KongTuke
let malicious_domains = dynamic(["tiixeira.lol", "confirmyouarehuman.top", "rueckec.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://tiixeira.lol/m", "https://rueckec.lol/api/v1/status", "https://confirmyouarehuman.top/o", "https://rueckec.lol/file.js", "https://rueckec.lol/api/v1/session", "https://rueckec.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 Job for Log Rotation
  Description: A legitimate scheduled job runs to rotate and archive logs, which may trigger the detection due to file access patterns.
  Filter/Exclusion: process.name != "logrotate" or process.parent.name != "systemd"

• Scenario: Admin Task – System Update via Puppet
  Description: An admin is performing a system update using Puppet, which may involve downloading or executing scripts that match the IOC patterns.
  Filter/Exclusion: process.name != "puppet" or process.args !~ /--no-color/

• Scenario: Database Backup Using mysqldump
  Description: A database backup process using mysqldump may generate temporary files or use command-line arguments that resemble malicious IOCs.
  Filter/Exclusion: process.name != "mysqldump" or process.args !~ /--single-transaction/

• Scenario: CI/CD Pipeline Artifact Download
  Description: A CI/CD pipeline (e.g., Jenkins, GitLab CI) downloads artifacts from a secure internal repository, which may trigger the rule due to URL or file patterns.
  Filter/Exclusion: process.name != "java" or process.args !~ /-jar\s+jenkins.war/

• Scenario: Network Monitoring Tool (e.g., Wireshark) Capturing Traffic
  Description: A network monitoring tool captures traffic that includes benign payloads or IP addresses matching the IOC list.
  Filter/Exclusion: process.name != "tshark" or process.args !~ /--capture-filter/