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

• 277f897de6428f1505aa5fd2dfab7bdf
• 365d253c8ff5f647b4598984198bab19

SHA-256

• b13b8eea96a67400a499071e3aa91f2adf2a259c43293dd75cb660a9e2dddcfe
• aa242d4c8a5f67afd47de854a31bb5bdc7d26a56341561b0651a4084e89849a8

SHA-1

• 7db077585b0fd1f83737dcc5474175eac5886d41
• 226c61996c6d7f367302e74fbc15cc28a3b4be96

Remediation

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