This hypothesis targets the presence of Remus ransomware indicators, which often enter the environment through phishing campaigns or compromised web assets to encrypt critical files and demand cryptocurrency payments. Proactively hunting for these IOCs in Azure Sentinel allows the SOC team to identify and isolate infected endpoints before the encryption process completes, thereby reducing the potential financial and operational impact of a ransomware attack.
Malware Family: Remus Total IOCs: 4 IOC Types: url
| Type | Value | Threat Type | First Seen | Confidence |
|---|---|---|---|---|
| url | hxxp://petcarv.click:8239/events | botnet_cc | 2026-09-23 | 75% |
| url | hxxp://obutdor.shop:5003/videos | botnet_cc | 2026-09-23 | 75% |
| url | hxxp://phetsre.shop:3452/transactions | botnet_cc | 2026-09-23 | 75% |
| url | hxxp://spogear.click:3546/comments | botnet_cc | 2026-09-23 | 75% |
// Hunt for access to known malicious URLs
// Source: ThreatFox - Remus
let malicious_urls = dynamic(["http://petcarv.click:8239/events", "http://obutdor.shop:5003/videos", "http://phetsre.shop:3452/transactions", "http://spogear.click:3546/comments"]);
UrlClickEvents
| where Url has_any (malicious_urls)
| project Timestamp, AccountUpn, Url, ActionType, IsClickedThrough
| order by Timestamp desc| Sentinel Table | Notes |
|---|---|
UrlClickEvents | Ensure this data connector is enabled |
Phishing Link Validation by Security Team: When the Security Operations Center (SOC) or Blue Team validates a phishing sample, analysts often open the malicious URL in a controlled browser or use tools like curl or wget to fetch the payload for analysis. This legitimate activity triggers the URL-based IOC.
curl.exe, wget.exe, powershell.exe with specific arguments) or exclude sessions where the user account is a dedicated “Phishing_Analysis” service account.Scheduled Web Scraping or Monitoring Jobs: Enterprise environments often run scheduled tasks (via Windows Task Scheduler or cron) using tools like Python (with requests library), Node.js (axios), or PowerShell to monitor competitor sites, check API health, or scrape data. If the Remus IOCs include generic or compromised domains that are also used for legitimate monitoring, these jobs will trigger the rule.
python.exe, node.exe, or pwsh.exe when the parent process is schtasks.exe or Task Scheduler, or filter by specific scheduled task names (e.g., “API_Health_Check”, “Competitor_Monitor”).DevOps CI/CD Pipeline Artifacts: In development environments, CI/CD pipelines (using Jenkins, GitLab CI, or Azure DevOps) may download build artifacts, dependencies, or test fixtures from internal or external repositories. If a repository URL matches a Remus IOC (due to a compromised dependency or shared infrastructure), the build agents will trigger the detection.
jenkins-agent.exe, gitlab-runner, azure-devops-agent) or exclude network connections originating from specific