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January 17, 2025Severity
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 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
- Sensitive Information Theft
- Credential Theft
Indicators of Compromise
MD5
9f7d0b9a32de0f6cefb6a3328f833034
39080b718b5fd386e181eae293d3dd8e
c9feda13f449c852ee9b95967bdfd3de
c9f4668c97eb480751e1bbf6173fc4e1
SHA-256
6e333e5b68668934186d53525c24d2ed857c35e36b4d21102d06e52e6890ac5f
eae062b9aa062793a84a0c5b60223aab93f29f995de6250720610ba248945162
ea0dec7cb08637c829b8c4d08439524e9c1ad5a7116e6cfd8780b533809bff72
b9f8572fc7a8a6c2230434abb7190ae860f28386b3f0d5e5ee3754c6befca240
SHA1
b2f45dab2c76093c317cab36a47873e55e2c7c6e
d08ff7cf2dd523b14453fc3a2403fc08adc8185e
015bf16040a779d85521d5296b6ed27d1e761e70
528deade2bc88cafc26f78f7c73490b66abdf370
Remediation
- Block all threat indicators at your respective controls.
- Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
- Emails from unknown senders should always be treated with caution.
- Never trust or open links and attachments received from unknown sources/senders.
- Enable antivirus and anti-malware software and update signature definitions on time. Using multi-layered protection is necessary to secure vulnerable assets.
- Patch and upgrade any platforms and software on time and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.