Major increase of dangerous Filecoders – trojans extorting ransom after encrypting data : ESET

1st October 2013 | By Mouseworld Now Correspondent |

New Delhi, India, October 1, 2013: ESET, ESET HQ Malware Research Lab is reporting an unusual spike in the actvity of Filecoder malware – trojans that encrypt user files and try to extort a ransom from the victim in exchange for a decrypting software.

ESET LiveGrid technology- the company’s cloud-based malware collection system – has shown a rising weekly number of Win32/Filecoder detections by over 200% since July 2013 from average numbers in January – June 2013.

To infect the computer, cybercriminals are using various infiltration methods: drive-by downloads from malware-laden websites; e-mail attachments, installation through another Trojan or Backdoor, or even manual installation by the attacker.

Robert Lipovsky, Malware Researcher at ESET, said, “TheWin32/Filecoder malware family is more dangerous than other types of so-called ransom ware as they usually encrypt pictures, documents, music and archives. A wide range of techniques and levels of sophistication has been seen in different variants over time. It can be very expensive. Malware samples in this malware category usually request sums around 100 – 200€, however some have been seen extorting up to 3000€. The high amount is consistent with the fact that the attackers usually target businesses that can usually afford to pay higher ransoms than individuals.”

One recent variant puts the victims under pressure by displaying a countdown timer indicating that the encryption key will be permanently deleted, making the recovery of the encrypted files nearly impossible. However, it is also a good idea to password-protect anti-malware software’s settings to prevent them.

 

© Mouseworld Now News Service

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