One of my clients send me some picture that shows they infected by some ransomware. As i analysed i found that ransomware is probably Dharma ransomware, child of Crysis. so i tried to decrypt files with Kaspersky and avast tools but failed. Files renamed to some thing like :
test1.txt.id-XXX.[black.mirror@qq.com].java
The real file name was test1.text
. I need a tool to decrypt them for a decryption with master key for it?