Ransomware Research

CryptoApp Ransomware

CryptoApp is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2015, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
CryptoApp
First Seen
August 1, 2015

How CryptoApp Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..encrypted

Ransom Note and Payment Demands

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

message

Ransom message:

notes/note.txt

Note locations:

Login
screenshot

Ransom message:

notes/wlp.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with CryptoApp ransomware:

  • transaction_certif_2412_installer.exe
  • WesternUnionCertificateXP.exe
  • csrsssexe
  • csrsss.exe
  • weddingclip_csrsss.exe
  • yfV4H.vcf
  • csrss.exe.0x3a
  • scrsss.exe
  • CryptoApp.exe
  • VERSJ5.7z
  • decrypter.exe.0x3a

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About This Analysis

This CryptoApp 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 CryptoApp.

Last updated: October 30, 2025

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