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

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

• 67d699cad08d8ba51988112012389d79
• aec0f2de305ac062d720967cd8e10532

SHA-256

• 70f14754d5d44e4c6f3e7d127353f33f7ae05766fd8983e4105195035dc02e7d
• 6fa7f7b8fdac392e44af2ebc36444638d309cd7703bc9d65f36853b053dc1283

SHA-1

• 48700b6a8be7e908505728a755828a1dc1e48d12
• d7765402ff3935b269ffc0b4317eb381a58830bc

Remediation

• Block the threat indicators at their respective controls.
• Search for IOCs in your environment.