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Rewterz Threat Advisory – ICS: Hitachi RAID Manager Storage Replication Adapter Vulnerabilities
September 7, 2022
Rewterz Threat Advisory – CVE-2022-20696 – Cisco SD-WAN vManage Software Vulnerability
September 8, 2022

Rewterz Threat Alert – DarkCrystal RAT (DCRat) – Active IOCs

September 8, 2022

Severity

High

Analysis Summary

DCRat – a Russian backdoor, was initially introduced in 2018, but rebuilt and relaunched a year later. The DCRat backdoor appears to be the product of a single threat actor who goes online with the pseudonyms of “boldenis44,” “crystalcoder,” and Кодер (“Coder”). 

DCRat is one of the cheapest commercial RATs. For a two-month membership, the price starts at 500 RUB (less than 5 GBP/US$6), and it periodically drops even cheaper during special offers. This is written in .NET and features a modular structure, allowing affiliates to create their own plugins using DCRat Studio, a dedicated integrated development environment (IDE).

The malware’s modular architecture allows it to be extended for a variety of nefarious objectives, including surveillance, reconnaissance, data theft, DDoS attacks, and arbitrary code execution.

The DCRat consists of three parts:

  • A stealer/client executable
  • The command-and-control (C2) endpoint/ interface is a single PHP page
  • An administrator tool

The malware is still in development, the author announces any news and updates through a dedicated Telegram channel with about 3k users updated with any news and changes.

Impact

Data Theft
Exposure of Sensitive Data

Indicators of Compromise

MD5

  • 194e50b51fffd24e507038cb6040e140
  • 1b34602377fbe856bc2b46e7f230b3c0

SHA-256

  • 1db44677c334016b1a8cd17708e03fb8fee2d0a746d85fb75a97662ed36f4c0f
  • c28dda946198ea9e3f0088c9b26fa02bb4a8e5a59142ae48151dc55f6a649071

SHA-1

  • 93d4fbab729c380c6d91700f237815780394e8e4
  • d9ce4da54fe1102533b1111f73763007997bf5e3

Remediation

  • Block the threat indicators at their respective controls.
  • Search for IOCs in your environment.
  • Services
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      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
      • Purple Team Assessment
      • Social Engineering
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    • Respond
      • Incident Response
      • Incident Analysis
  • Transform
    • SOC Consultancy
    •     SOC Maturity Assessment
    •     SOC Model Evaluation
    •     SOC Gap Analysis
    •     SIEM Gap Analysis
    •     SIEM Optimization
    •     SOC Content Pack
  • Train
    • Security Awareness and Training
    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
  • Managed Security
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      • Remote SOC
      • Onsite SOC
      • Hybrid SOC
    • Managed Security Services
      • Managed Detection and Response
      • Managed Endpoint Detection and Response
      • Managed Threat Intelligence
      • Managed Threat Hunting
      • Managed Risk-Based SOAR
      • Managed Penetration Testing
  • Solutions
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