HrServ (Web Shell)

 Name: HrServ Web Shell

Category: Web Shell

Type: Malware

Primary Function: Remote Server Manipulation

Infection Method: Scheduled Task Creation and Service Configuration

Target Platform: Windows Systems

Signature Features:

• Custom Encoding Methods for Communication
• In-memory Execution
• Uses HTTP Server API
• Custom GET and POST Request Handling
• Manipulates Registry and Temporary Files for Communication

Mitigation Strategies:

• Monitor Scheduled Tasks for Unusual Activity
• Audit System Registry for Unexpected Changes
• Network Traffic Analysis for Anomalous Patterns
• Employ Web Application Firewalls (WAFs)

Potential Impact: Unauthorized Access and Control over Affected Systems; Data Theft and Manipulation

Captain's Note: The HrServ web shell is a cunning tool, lurking unseen like a shark beneath the waves. It’s crucial we stay vigilant and monitor our ships (systems) for any sign of this treacherous foe. With smart navigation and a keen eye, we can protect our digital treasures from such hidden dangers.

MITRE ATT&CK Techniques:

• T1100: Web Shell
• T1059: Command and Scripting Interpreter
• T1021: Remote Services
• T1562: Impair Defenses