Ransomware Research
CheckMail7 Ransomware
CheckMail7 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CheckMail7
- First Seen
- January 1, 2020
How CheckMail7 Ransomware Works
Targeted Files
Long encryption process
File Encryption Patterns
CheckMail7 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..checkmail7@protonmailRansom Note and Payment Demands
After encrypting files, CheckMail7 displays ransom notes demanding payment for file recovery:
warning.txtRansom message:
notes/warning.txt
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About This Analysis
This CheckMail7 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 CheckMail7.
Last updated: July 30, 2025