Name :	Virus:W32/Gpcode.AK
Detection Names :	Virus.Win32.Gpcode.AK
Aliases :	TROJ_GPCODE.AD (Trend Micro) TR/Gpcode.I (Avira) Troj/Gpcode-D (Sophos) Trojan:Win32/Gpcode.G (Microsoft) Trojan.Gpcoder.F (Symantec)
Size:	8030
Category:	Malware
Type:	Virus
Platform:	W32

Gpcode.AK is "ransom-ware" that intends to extort money from the victim by encrypting data files.

It requires the victim to order the malware author's custom tool to restore the encrypted data.

Gpcode.AK searches drives C to Z for the following file types on the system:


It then encrypts the discovered files using an RSA algorithm and renames them with a ._CRYPT extention and deletes the original files.

As a ransom note, it drops the file !_READ_ME_!.txt to the directory that requires the victim to buy a custom decrypting tool from the malware author.