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 #28180  by sysopfb
 Sat Apr 02, 2016 4:25 pm
Commonly used to download Kovter. Also been used to download cryptowall, teslacrypt,radamant...

They added a crappy 'ransomware' piece to the top of the javascript that will download a simple exe that takes a file as a parameter and XORs the first 0x800 or 2048 bytes of the file with a static 255 byte key.
The XOR is done by reading a single byte from the file at a time....


Image

javascript and file crypter exe in attachment.
Attachments
infected
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