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Virus Alert: Maze Ransomware

Type: Ransomware



Severity: - High




The Maze ransomware was initially discovered in May 2019 and recently Cyber

security community has seen a rise in Maze ransomware activities. Maze

ransomware is often delivered via emails or exploit kits such as Fallout

and Spelevo. Fallout and Spelevo exploit kits takes advantage of flaws in

Adobe Flash Player and Microsoft Windows (CVE-2018-8174, CVE-2018-15982,

and CVE-2018-4878). In addition to these, Maze ransomware uses Remote

Desktop Protocol (RDP) and malicious advertisements as its attack vectors.



Maze ransomware uses 2048 bit Rivest-Shamir-Adleman (RSA) and ChaCha20

stream cipher encryption to encrypt files. It appends arbitrary extensions

to the files during the encryption process. The Maze ransomware executes a

“process killer” before starting the encryption processes. Ransomware

terminates target processes mainly debuggers, text editors, and programming

IDEs, databases and languages running on the infected system. Maze

ransomware deletes Shadow Volume Copies twice (pre and post encryption) to

ensure that recovery is not possible. It then changes the user's desktop

wallpaper to a message about the encrypted files and the file name of the

dropped ransom note. The malware tries to make connections to IP addresses

that have been crypted in the binary to send information about the infected

machine.


The ransom note asks the victim to contact the threat actor by email for

the decryption key. An interesting feature of this ransomware is that it

says the ransom amount will be different depending on the type of device.

This is uncommon in this ransomware. Maze operators have used the following

labels to indicate the user's computer type in the wallpaper message:



• Standalone server



• Server in corporate network



• Workstation in corporate network



 • Home computer



• Primary domain controller



• Backup server



• Very valuable for you



Another uncanny characteristic of Maze ransomware has been post compromise

cyber extortion in lieu of stolen data. Failing to pay ransom Maze

operators release stolen data on the Internet.



Indicators of Compromise:



Hashes



SHA256



dee863ffa251717b8e56a96e2f9f0b41b09897d3c7cb2e8159fcb0ac0783611b



SHA1



31c3f7b523e1e4060330958e28882227765c3c5e



SHA256



6345697c16f84d3775924dc17847fa3ff61579ee793a95248e9c4964da586ddi



SHA1



c5938ec75e5b655be84eb94d73adecOf63fbce16



SHA256



5a900fd26a4ece38de5ca319b5893f96c7e9e2450dbac796c12f85b99238ec18



SHA1



1e994b5ac039a1c7612bab93248532bf3ed7e6de







Network IOC’s



Mazedecrypt[.]top



conbase[.]top



mazedecrypt[.]top



condurises[.]xyz



emplementriaton[.]xyz



fantimit[.]xyz



91[.]218.114.11



91[.]218.114.25



91[.]218.114.26