This hypothesis targets adversaries leveraging the specific malicious URL cluster d52f85 to deliver payloads or establish initial footholds, often through phishing or drive-by downloads. Proactively hunting for these URLs in Azure Sentinel allows the SOC to identify compromised endpoints or user sessions before lateral movement or data exfiltration occurs, reducing the mean time to detect (MTTD) for high-severity web-based threats.
Threat: d52f85 Total URLs: 4 Active URLs: 1
| URL | Status | Threat | Date Added |
|---|---|---|---|
hxxp://62.60.226.140/files/5356600191/fPk5ovp.exe | offline | malware_download | 2026-09-16 |
hxxps://github.com/serhat9611/pruva-download/releases/download/v0.1.7/Pruva-Buyuk-0.1.7.exe | online | malware_download | 2026-09-16 |
hxxps://userhotels.org/Adobe%20Acrobat_Reader.exe | offline | malware_download | 2026-09-16 |
hxxp://62.60.226.140/files/7299809293/Zar7QE5.exe | offline | malware_download | 2026-09-16 |
// Hunt for DNS resolution of URLhaus malicious domains
// Threat: d52f85
let malicious_domains = dynamic(["github.com"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses
| order by TimeGenerated desc// Hunt for web traffic to URLhaus malicious domains
let malicious_domains = dynamic(["github.com"]);
CommonSecurityLog
| where RequestURL has_any (malicious_domains) or DestinationHostName has_any (malicious_domains)
| project TimeGenerated, SourceIP, RequestURL, DestinationHostName, DeviceAction
| order by TimeGenerated desc| Sentinel Table | Notes |
|---|---|
CommonSecurityLog | Ensure this data connector is enabled |
DnsEvents | Ensure this data connector is enabled |
Legacy Application Database Seeding: A legacy internal inventory management system (e.g., a custom Java application) uses a hardcoded configuration file that points to a deprecated staging endpoint for initial data seeding. This URL, now tagged as d52f85 on URLhaus, is hit during the nightly 02:00 AM database synchronization job.
Legacy-Apps subnet (e.g., 10.20.5.0/24) and the destination port is 80 or 443, specifically if the User-Agent header contains Legacy-Inventory-Sync/1.0.CI/CD Pipeline Dependency Check: The Jenkins or GitLab CI pipeline for the frontend-web project includes a pre-build step that pings a specific external CDN or mirror site to verify availability before pulling Docker images. This specific URL path was recently flagged by URLhaus due to a transient compromise, but the CI runner (ci-runner-04) still accesses it during every main branch push.
ci-runner-* and the request method is HEAD or GET with a status code of 200 or 301, limiting the exclusion to the CI-CD security group.Third-Party SaaS Webhook Verification: The marketing automation platform (e.g., HubSpot or Marketo) sends periodic health-check pings to a custom webhook endpoint hosted on a public-facing API gateway. If the gateway’s routing table was misconfigured to forward these pings to a legacy backend service, it may hit the flagged URL. This occurs during the daily-health-check scheduled task.