Ransomware Research

Rhino Ransomware

Rhino is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Marvel, Parrot, GeneralChin, Coka, Termit.

Quick Facts

Ransomware Family
Rhino
First Seen
September 1, 2018
Known Aliases
MarvelParrotGeneralChinCokaTermit

How Rhino Ransomware Works

Targeted Files

Full extension of encrypted file - .[generalchin@countermail.com].rhino

File Encryption Patterns

Rhino modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..rhino..parrot..coka..termit

Ransom Note and Payment Demands

After encrypting files, Rhino displays ransom notes demanding payment for file recovery:

fileReadMe_Decryptor.txt

Ransom message:

notes/ReadMe_Decryptor.txt

Note locations:

EveryFolder
fileDecryptor_Info.hta

Ransom message:

notes/Decryptor_Info.hta
message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

Technical Indicators

Associated Executable Files

The following executable files are associated with Rhino ransomware:

  • mhtop32bit.exe
  • cake4.exe
  • s.exe
  • MHTOP32BIT.EXE
  • marvel.exe
  • MARVEL.EXE
  • .coco.exe
  • NS.exe
  • NS v.222_.exe
  • sssss111.e x e
  • local.exe
  • NS v.2.exe
  • program.exe
  • NetworkShare_pre2.exe
  • NS2.exe
  • tmp31F8.tmpuscszqdj.exe
  • tmpF185.tmpuscszqdj.exe
  • tmp4C51.tmpuscszqdj.exe
  • tmp1DD2.tmplbhcpsokfdayzewqkyhnvykpprcqmeocggxdhtlyqkhzmvglqneosaxnyrhhfktpwfwbrkgnhiwullzvkyzxaavfhfypldesmtuueqvdiorwuqejtqxykupwkjulmrrdhqbbmqwcpcllteyvpkgzgvmgbglgntlfhqhjtitfxavwjqvvpmiekrxquoaysjfhugfghlls.exe
  • tmp559E.tmplbhcpsokfdayzewqkyhnvykpprcqmeocggxdhtlyqkhzmvglqneosaxnyrhhfktpwfwbrkgnhiwullzvkyzxaavfhfypldesmtuueqvdiorwuqejtqxykupwkjulmrrdhqbbmqwcpcllteyvpkgzgvmgbglgntlfhqhjtitfxavwjqvvpmiekrxquoaysjfhugfghlls.exe
  • tmp43B3.tmpidiiqvptjwrghazidsbrttmhwmvhfwsmtumwvbfsjzofymhblhdhrzjdqwjuzrqvlpiujunjcmjyviiiyscxkvkyloaeyysmunbvduymevkpppjmmusxueueedjuyqpqptxsbntxtfreuubiwkoxtfffhqealxgdfxahmgxzddwezgbvkigkomvyqbveqtuyzwkoyivh.exe
  • NSs.exe
  • NS-v2.exeC
  • executable.exe
  • nc123.exe
  • share.exe
  • NetworkShare v.2.exe
  • NS-v2.exe
  • tmp8786.tmputxyhyqm.exe
  • tmpA3C8.tmputxyhyqm.exe
  • ns._xe
  • 5-NS new.exe
  • 1NS.exe
  • 6.exe
  • NS.exe.exe
  • ns2.exe
  • NETWORKSHARE_PRE2.EXE
  • ns.exe
  • _CACHE~1.EXE
  • tmp429A.tmputxyhyqm.exe
  • tmpC857.tmputxyhyqm.exe
  • NetworkShare v.2.exe.Hermes865
  • tmp52C0.tmpineuwanlzvwosgccarmhanxrgbcaibcszyofdwlctkrcomtixulalgnvbxwufnpgzqprrnnufbpmksbeljsatvpbnbkgamnpylxlsafgnmvteaynfxjvppidocporiuqsahzftwkfchnzgqmjtasrxzvobifkeogftrwbuiuyxmbrvdrtzezuycfallkvjaoha.exe
  • tmp7B66.tmpbazijldzdy.exe
  • tmp497D.tmpbbpinq.exe
  • tmp7992.tmpi.exe
  • build.exe
  • tmp81D8.tmpineuwanlzvwosgccarmhanxrgbcaibcszyofdwlctkrcomtixulalgnvbxwufnpgzqprrnnufbpmksbeljsatvpbnbkgamnpylxlsafgnmvteaynfxjvppidocporiuqsahzftwkfchnzgqmjtasrxzvobifkeogftrwbuiuyxmbrvdrtzezuycfallkvjaoha.exe
  • tmp527B.tmpbazijldzdy.exe
  • tmp3F80.tmpbbpinq.exe
  • Marvel.exe

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About This Analysis

This Rhino ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Rhino.

Last updated: July 30, 2025

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