sinlesspleasure com

Hunt Hypothesis

The rule detects potential malicious activity associated with the domain sinlesspleasure.com, which may indicate reconnaissance or initial compromise attempts. SOC teams should proactively hunt for this behavior to identify and mitigate early-stage adversarial activity in their Azure Sentinel environment.

YARA Rule

rule sinlesspleasure_com {
    strings: $ = "5e908r948q9e605j8t9b915n5o9f8r5e5d969g9d795b4s6p8t9h9f978o8p8s9590936l6k8j9670524p7490915l5f8r90878t917f7g8p8o8p8k9c605i8d937t7m8i8q8o8q959h7p828e7r8e7q7e8m8o5g5e9199918o9g7q7c8c8t99905a5i8l94989h7r7g8i8t8m5f5o92917q7k9i9e948c919h925a5d8j915h608t8p8t9f937b7k9i9e948c919h92"
    condition: any of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

• Microsoft Defender for Endpoint — Custom indicators / advanced hunting
• Email Gateway — Attachment scanning
• File Share Monitoring — Periodic scanning of shared drives
• YARA CLI — Manual threat hunting on endpoints
• Source Rule

False Positive Guidance

• Scenario: A system administrator is using PowerShell to perform routine system cleanup tasks, such as removing temporary files or logs.
  Filter/Exclusion: Exclude processes initiated by the system or nt authority\system account, or filter by command line arguments containing clean, remove, or delete.

• Scenario: A scheduled job (e.g., via Task Scheduler or cron) is configured to run a legitimate script that performs system maintenance, such as disk cleanup or log rotation.
  Filter/Exclusion: Exclude processes with a Start Time matching known scheduled job times, or filter by the presence of a Task Scheduler or cron identifier in the process name or command line.

• Scenario: A backup tool (e.g., Veeam, Commvault, or Acronis) is performing a backup operation that involves copying files from one location to another.
  Filter/Exclusion: Exclude processes with the names of known backup tools, or filter by the presence of backup-related command line arguments like backup, snapshot, or restore.

• Scenario: A security tool (e.g., Windows Defender, Malwarebytes, or CrowdStrike) is scanning files or performing a full system scan.
  Filter/Exclusion: Exclude processes with known security tool names or parent processes associated with endpoint protection platforms.

• Scenario: A development team is using Docker or Kubernetes to run containers that temporarily write or modify files during testing or deployment.
  Filter/Exclusion: Exclude processes running in a containerized environment (e.g., check for docker or k8s in the command line), or filter by container IDs or names associated with development environments.