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

• 01498f6bd1d1b79cc6a152dc5a625d12
• 02b7395a500cba20e53c0be24c2a5834
• 0d2e08a91156af301ccebb8b48f467ad

SHA-256

• eccaec76c66960ba7245ac0b0d60c5f79ed52603a8333da79668ef4e78f42059
• 99cb3e6404b5415de7a6300f1ad678fe95b0027ea7ebd04d005489172afbad85
• d6e59815c0f787f63a9a47677b12a225e719b8779db8265f10673d0bb991b5f9

SHA-1

• 9590d8a136011ef8f831277c9d98aae8fba1e06a
• 6b7ea7bdb8ce465e06c7fc13b7a76251e48187b4
• 9ec45df299be2c14ea64135e40a4026a5f47c7f4

Remediation

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