ThreatFox: IClickFix IOCs

Hunt Hypothesis

This hunt detects adversary activity involving specific indicators of compromise (IOCs) linked to the IClickFix platform, which may signal unauthorized access or data exfiltration attempts targeting enterprise maintenance workflows. A proactive search in Azure Sentinel is critical because these high-severity IOCs can reveal early-stage compromises that standard automated alerts might miss, allowing the SOC team to rapidly isolate affected assets and mitigate potential lateral movement before broader impact occurs.

IOC Summary

Malware Family: IClickFix Total IOCs: 5 IOC Types: domain

KQL: Domain Hunt

// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - IClickFix
let malicious_domains = dynamic(["a1-analytics.sbs", "b2-analytics.xyz", "a2-analytics.xyz", "lps.edu.sg", "career.cityu.edu.gr"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses, QueryType
| order by TimeGenerated desc

Required Data Sources

References

• ThreatFox — IClickFix

False Positive Guidance

Here are specific false positive scenarios and corresponding exclusion strategies for the ThreatFox: IClickFix IOCs detection rule in an enterprise environment:

• Scenario: Scheduled Backup of IClickFix Configuration Files

  • Context: The nightly backup job (e.g., using Veeam or Windows Task Scheduler) archives the C:\ProgramData\IClickFix directory, which contains configuration manifests and cached assets matching the rule’s IOCs. This triggers a file access alert on legitimate system files.
  • Filter/Exclusion: Create an exclusion for process paths where the parent process is VeeamAgent.exe or svchost.exe (specifically the “Task Scheduler” service) accessing directories under C:\ProgramData\IClickFix.

• Scenario: Admin Deployment via SCCM/Intune

  • Context: During a quarterly maintenance window, the IT team uses Microsoft Endpoint Configuration Manager (SCCM) or Microsoft Intune to push an update package for IClickFix. The deployment agent extracts and writes files that match the detection’s hash signatures, causing a high volume of alerts during the rollout period.
  • Filter/Exclusion: Exclude events where the initiating process is ccmsetup.exe (SCCM) or IntuneManagementExtension.exe, specifically when the file path contains \IClickFix\.

• Scenario: Automated Health Check by Monitoring Tools

  • Context: Enterprise monitoring solutions like Datadog, SolarWinds, or Nagios run continuous health checks that query specific IClickFix service endpoints and log files. These tools often read the IOC-defined registry keys or log files to verify service status, triggering the rule as a “suspicious access.”
  • Filter/Exclusion: Add an exclusion for processes named `