Ransomware Research
ProposalCrypt Ransomware
ProposalCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ProposalCrypt
- First Seen
- December 1, 2016
How ProposalCrypt Ransomware Works
File Encryption Patterns
ProposalCrypt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cryptedRansom Note and Payment Demands
After encrypting files, ProposalCrypt displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with ProposalCrypt ransomware:
proposal.doc_________________________________________________________________________________________________________________________________.exeProposalCrypt Ransomware.exeproposal15.doc_.exe
Elastio Can Help You
Don't let ProposalCrypt ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This ProposalCrypt 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 ProposalCrypt.
Last updated: July 30, 2025