fileREADME.txt
notes/README.txt
Location: EveryFolder
Ransomware Research
GAmmA Group Ransomware
GAmmA Group is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Cat22, GAmmAWare.
Quick facts
- Ransomware Family
- GAmmA Group
- First Seen
- May 1, 2020
- Known Aliases
- Cat22
- GAmmAWare
How GAmmA Group ransomware works
File modification behavior
GAmmA Group updates file modification timestamps after encryption.
File encryption patterns
GAmmA Group modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .DEMON
Ransom note and payment demands
After encrypting files, GAmmA Group displays ransom notes demanding payment for file recovery:
message
notes/note.txt
Location: OnceOnCompletion
Technical indicators
Associated executable files
The following executable files are associated with GAmmA Group ransomware:
- Trojan.Ransom.BlackKingdom.exe
- 2020-01-05 Gamma BlackKingdom.exe
- Gamma BlackKingdom.exe
- Cat22.exe
- Client.exe
- office82.exe
- YCHIE9YN.exe
About this analysis
This GAmmA Group ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like GAmmA Group.
Detection coverage
Elastio detects GAmmA Group inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify GAmmA Group across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.