This blog post covers Cerber ransomware, infection methods, the working principle, how to remove Cerber ransomware, and how to protect against Cerber. - cc: hackernoon ransomware cybersecurity
Sophisticated techniques are used to infect computers and encrypt files. Let’s explain how victims are infected to understand infection vectors and how to protect against Cerber ransomware.
A double-zipped file, such as a self-extracting archive , with a malicious Windows Script File is another variation of the attached file. A phishing email can contain an unsubscribe link that redirects to the same malicious Cerber file. The archive contains three files:There are versions of Cerber ransomware with installers that contain a .ch file and .caz shellcode file with the code to decrypt the executable .ch file. In this case, Cerber uses Nullsoft Scriptable Install System to hide.
Each subkey in this registry key represents a Peripheral Component Interconnect device installed for the machine by using this format:VEN represents a Vendor ID, DEV represents a Device ID in the hexadecimal format . When hardware virtualization is used, hardware devices are emulated. Virtual devices use the appropriate Vendor IDs and Device IDs, depending on the hardware virtualization platform on which the VM is running.
Once executed, Cerber ransomware checks the directory from which the ransomware has been launched. If Cerber is not launched from %APPDATA%\<GUID>, then a copy of the Cerber file is created in the %APPDATA% directory of a user on a Windows machine. The file name is selected randomly by using one of the file names in the %WINDIR%\system32 directory for better masquerading.Bypassing Windows protection and changing Windows configuration is another part of Cerber’s aggressive behavior.
A shortcut file that references the ransomware is added to the Startup directory. As a result, Cerber ransomware executes automatically after a user logs into Windows.
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