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April 28, 2023Severity
Medium
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.
To protect against the DarkCrystal RAT and similar threats, it is important to regularly update software and security patches, implement multi-factor authentication, be cautious when opening emails and attachments, and regularly back up important data. It is also important to run anti-virus software and to be aware of the signs of a RAT infection, such as unusual system activity or slow performance. If a system is suspected of being infected with the DarkCrystal RAT or any other RAT, it is important to take immediate action to isolate the system and to seek professional assistance in cleaning up the infection.
Impact
- Unauthorized Remote Access
- Keylogging
- Information Theft
- Password Theft
Indicators of Compromise
Domain Name
- russiaisbetterthanukraine.me
MD5
- 1aa3c497aeb9ac70c236bd4d8eb75389
- 1dde40817b31fedcd414a7857387d8da
- 0d8ef6d15966eb940b00e078b0ae0bb1
SHA-256
- 7c69d5ef985215819db582998e6885d9d2ae11a3d0d950cc16a0174aa31dcfdf
- 3b2d67c12fb9248a282b48b115ba3c3f339ee9d4e37c381793db4b1b64d88fd3
- a468384b275c437d13c05d8433a2223910db37b9251fe0602752a7dc7664253c
SHA-1
- 29ad18b11dafa29a344201ba37195554f6c39c39
- b67f778e885d5957d4be981ff581104d77f6ab43
- dca3c3572947d17576f1530c9dc342bf0d9a70d8
Remediation
- Block all threat indicators at your respective controls. Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
- Enable two-factor authentication (2FA) on your accounts adds an extra layer of security and can help prevent unauthorized access even if your login credentials have been stolen.
- Regularly backing up your important data can help ensure that you don’t lose any critical information in the event of a malware infection or other data loss event.
- Be wary of emails, attachments, and links from unknown sources. Also, avoid downloading software from untrusted sources or clicking on suspicious ads or pop-ups.
- Make sure all of your software, including your operating system and applications, are up-to-date with the latest security patches. This can help prevent vulnerabilities that could be exploited by Aurora Stealer and other types of malware.