Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files. A ransom demand message is displayed on your desktop. Threat Summary: NameĪvast (Win32:Filecoder-M ), Combo Cleaner (), ESET-NOD32 (A Variant Of Win32/Filecoder.Q), Kaspersky (), Microsoft (Ransom:Win32/Sorikrypt.A), Full List Of Detections ( VirusTotal)Ĭannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). Fake software updaters infect systems using bugs, flaws of outdated programs, or inject malware instead of updates, fixes. It is very common for cracking tools to have malicious code injected into them.
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Users who use software cracking tools to activate licensed software or update installed programs can also infect their computers with malware. Users infect their computers when they download and execute a malicious file. Furthermore, malware can be distributed through untrustworthy download sources (for example, Peer-to-Peer networks, third-party downloaders). Another popular way to distribute malware is to trick users into infecting their computers with a Trojan.Ī Trojan is a type of malware that can drop its payload (for example, ransomware). The purpose of these emails is to trick recipients into downloading and opening malicious files. One of the most popular ways to deliver malware is to send emails containing malicious attachments or links. More examples of malware of this type are Alkhal, VICE SOCIETY, and Keq4p. Most ransomware variants generate a ransom note to provide contact and (or) payment information.
Malware of this type encrypts files and demands payment to restore access. In order to prevent ransomware from infecting other computers on a local network and encrypting more files, it is required to eliminate it from the infected system. There is a high chance that the attackers will not provide a decryption tool. Data can be recovered without payment only if victims have a copy of their data or a free decryption tool is available on the Internet. Typically, ransomware victims cannot open their files until they are decrypted with a tool purchased from the attackers. The ransom note created by MEMZ ransomware instructs victims to pay $900 in Bitcoins and then contact the attackers via and follow user on Twitter. Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:
MEMZ's ransom note contains contact and payment information.
For example, it renames " 1.jpg" to " 1.jpg.MEMZ", " 2.jpg" to " 2.jpg.MEMZ".
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MEMZ" extension to filenames, and creates a ransom note (the " HOW TO DECRYPT FILES.txt" file). MEMZ ransomware encrypts files, appends the ".
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