Monday, July 15, 2024
EHA

A New Ransomware Dubbed BlackCocaine Uses AES & RSA Encryption Methods

Recently, an Indian IT company that is specialized in the Banking and Financial Services sector, Nucleus Software has suffered a security breach on May 30, 2021, as reported by the cybersecurity experts at Cyble.

However, Nucleus Software has already reported the Bombay Stock Exchange (BSE) and the National Stock Exchange of India (NSEI) about this security breach. 

The company noted that the probability of financial data leak is dubious, as Nucleus Software has confirmed that they don’t store any financial data of its customers.

During the investigation, the security researchers at Cyble has discovered that this cyber attack is executed by the group behind the BlackCocaine Ransomware, and from the below image you can see the compromised page of BlackCocaine ransomware.

Technical Analysis

Here, the analysts assert that the first victim of the BlackCocaine ransomware group is Nucleus Software and they have also revealed the malicious website of BlackCocaine ransomware group:-

  • hxxp://blackcocaine[.]top/

On May 28, 2021, the above-mentioned domain name was registered by the BlackCocaine ransomware group. The security authorities at Cyble discovered the BlackCocaine ransomware sample files during their routine exercises.

The operators of BlackCocaine ransomware have used the MinGW tool to compile the ransomware payload file that is a UPX-packed 64-bit Windows executable file. 

While the threat actors have used the Go language to program this malicious executable, and on May 29, 2021, the operators behind this attack have compiled this executable file. 

After manually extracting the ransomware payload, the experts concluded that to evade several security analysis tools and make this more complicated threat actors have used various anti-VM and anti-debugging methods.

Here, while encrypting the victim documents to perform file system inventory, the BlackCocaine ransomware decrypts Windows APIs. After completing this stage, it automatically affixes the “.BlackCocaine” extension to the filenames of each encrypted file.

Moreover, cybersecurity researchers have concluded that in this attack the AES and RSA Encryption methods are used by the operators behind this BlackCocaine ransomware. 

After the successful encryption process, on the infected system, the threat actors drops a ransom note:- 

  • “HOW_TO_RECOVER_FILES.BlackCocaine.txt” 

Recommendations

The experts have suggested few recommendations and here they are mentioned below:-

  • To track and block the malware infection always use the shared IoCs.
  • Use strong passwords.
  • Use multi-factor authentication.
  • Turn on the automatic software update.
  • Use security tools.
  • Avoid opening untrusted links and email attachments.
  • Use the service provided by the AmiBreached.com portal to track your exposure in the Darkweb.

The BlackCocaine ransomware is one of the active and sophisticated malware strains; but, to lock the data and demand ransom from the victim the BlackCocaine uses the same standard of server-side encryption method.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity, and hacking news updates.

Website

Latest articles

Critical Cellopoint Secure Email Gateway Flaw Let Attackers Execute Arbitrary Code

A critical vulnerability has been discovered in the Cellopoint Secure Email Gateway, identified as...

Singapore Banks to Phase out OTPs for Bank Account Logins Within 3 Months

The Monetary Authority of Singapore (MAS) and The Association of Banks in Singapore (ABS)...

GuardZoo Android Malware Attacking military personnel via WhatsApp To Steal Sensitive Data

A Houthi-aligned group has been deploying Android surveillanceware called GuardZoo since October 2019 to...

ViperSoftX Weaponizing AutoIt & CLR For Stealthy PowerShell Execution

ViperSoftX is an advanced malware that has become more complicated since its recognition in...

Malicious NuGet Campaign Tricking Developers To Inject Malicious Code

Hackers often target NuGet as it's a popular package manager for .NET, which developers...

Akira Ransomware Attacking Airline Industry With Legitimate Tools

Airlines often become the target of hackers as they contain sensitive personal and financial...

DarkGate Malware Exploiting Excel Files And SMB File Shares

DarkGate, a Malware-as-a-Service (MaaS) platform, experienced a surge in activity since September 2023, employing...
Balaji
Balaji
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles