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

• 513f2803b09639402a01f28a0dbdbdc4
• 4fc1d7482f5ef507946c57bebca8cecc
• 934fc324e634b13462a050770b5664d8

SHA-256

• 331a7ae480c3fcc7c3ea8e2ef33030e83c3d40fde9bdb3bd326b3e1d4488c9bb
• 3c7a2975470620f9075b736e679251750920c19729c00ec2fb47b91ea286deaf
• 5e192a8c1caa955cbec78a9a0a0daa949fed7767d365c2196dd043f7ce03d1dc

SHA-1

• d65c66f8c35b2643747dc2d35c7b684b787a99b6
• d6e7f56eebcf7d8e938625ae90a61eddb7dbe262
• ce20bf6b33d82b75b9abfa42ee25e2a62082c010

Remediation

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