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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
Targeted Files
https://blog.0x3a.com/post/126900680679/analysis-of-a-piece-of-ransomware-in-development
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:
Ransom message:
notes/note.txt
Note locations:
Login
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
Elastio Can Help You
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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: July 30, 2025