Ransomware Research
Tongda Ransomware
Tongda is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Tongda, CryptoGo, Add1.
Quick Facts
- Ransomware Family
- Tongda
- First Seen
- March 1, 2020
- Known Aliases
- TongdaCryptoGoAdd1
How Tongda Ransomware Works
Targeted Files
Written in Go
File Encryption Patterns
Tongda modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
.1Ransom Note and Payment Demands
After encrypting files, Tongda displays ransom notes demanding payment for file recovery:
readme_readme_readme.txtRansom message:
notes/readme_readme_readme.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Tongda ransomware:
update_11.3.58.exe
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About This Analysis
This Tongda 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 Tongda.
Last updated: July 30, 2025