![]() If it does not have access to the MBR, it encrypts the files in the user’s home folder. ![]() If it detects attributes associated with malware analysis, it overwrites the Master Boot Record which makes the infected computer inoperable.The repetitive action floods application tracing tools. Unlike other malware which avoids detection by sleeping for an extended period of time, it consumes time by writing to memory repeatedly. Once it is running on a Windows computer, it goes through checks to see if it is running within a sandbox (a virtual environment to identify potential threats).Rombertik is designed to intercept plain text entered into a browser window and collect usernames and passwords entered into websites visited by the victim.The victim downloads and unzips the attachment to specific spam and phishing messages, and then double clicks to open the file, installing the malware. ![]() ![]() It collects information from all websites visited by the victim (not just banking sites), and (if it is detected) it makes the victim’s computer unusable. Cryptolocker is designed to encrypt the user’s files (making the computer unusable), and demand a ransom for the decryption key to restore them. Dyre is designed to steal information from online banking sites. Cybercriminals use social engineering tactics to trick users into opening phishing emails, which “fish for” confidential information. Like other malware including Dyre and Cryptolocker, Rombertik is delivered through phishing campaigns. A computer attacked by Rombertik will display “Carbon crack attempt, failed.” Image courtesy of Talos Group, which creates threat intelligence for Cisco products. Rombertik is designed to steal usernames and passwords, but if it finds that its actions are being monitored, it attacks the user’s hard drive. A new form of spyware is making headlines.
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