Attackers Behind Petya-Ransomware Emptying Bitcoin Wallet

The attackers behind Petya-ransomware have 9,000 euros paid by victims transferred to another bitcoin wallet. That leaves Aleks Gostev on Twitter know, chief security expert at anti-virus firm Kaspersky Lab. The ransomware which last Tuesday infected several organizations showed users see a screen where they were instructed to make about $ 300 to the specified bitcoin wallet.

Unlike many other ransomware became for all victims the same bitcoin wallet used. Last night decided the attackers 9,000 victims who had paid to worry about another wallet. In addition, there appeared on Pastebin message that bitcoin 100 (225 000 euro) were asked for the decryption key to decrypt all infected systems by Petya.

However, it is unclear whether the persons who placed the Pastebin message also behind the Petya-ransomware. According to researcher Matt Suiche attackers try to confuse the public by the story Petya actually a wiper which data could again turn into a story about ransomware, let him opposite Vice Magazine know.

Ransomware Crypto Defense allows decryption key behind computer victim

Ransomware Crypto Defense contains a crucial mistake: it allows the decryption key back to the computer of the victim.

Symantec analyzed Crypto Defense. The ransomware is part of the extended family of malware programs that encrypt files of victims until a ransom is paid. Crypto Defense uses Microsoft and Windows API to generate Encryption and decryption keys.

Key
Defense Crypto encrypts files using a 2048-bit RSA key. The secret key needed to de-crypt the files will be sent back to the server, the attacker until the ransom is paid again. Apparently the developers did not know that the secret key on the computer of the victim is in a directory containing application data. This key can decrypt the victim his data without the intervention of the cyber criminals. Itself, Unfortunately, the average user will not have enough knowledge to make this actually perform.

Success
Symantec estimates that have received, which shows the effectiveness of the scam. Cyber criminals within one month, more than $ 34,000 in bitcoins.
Symantec has blocked 11,000 Defense Crypto infection attempts in more than 100 countries. The majority of infection attempts were in the U.S., followed by Britain, Canada, Australia, Japan, India, Italy and the Netherlands.

MD5: f57d188c4667fab46208396af20badd2 (Virus Total Permalink)
         60f302b88160c27263c61c7e91dcb94e (Virus Total Permalink)