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New Variant of Dharma Ransomware spotted in the wild.



Description


The SonicWall Threats Research team observed reports of a new variant family of Dharma Ransomware [GAV: Dharma.RSM and Dharma.RSM_2] actively spreading in the wild.

Dharma encrypts the victims files with a strong encryption algorithm until the victim pays a fee to get them back.

Infection Cycle:

The Malware adds the following files to the system:

  • Malware.exe

    • %SystemRoot%\Malware.exe

    • %Userprofile%\Start Menu\Programs\Startup\Info.hta

The Trojan adds the following files to the Windows to ensure persistence upon reboot:

  • % Userprofile%\Start Menu\Programs\Startup\Malware.exe"

The Trojan adds the following keys to the Windows registry startup:

Once the computer is compromised, the malware copies its own executable file to %SystemRoot% folder and deletes the primary executable file and rename all your personal files to .wallet extension.

The Malware encrypts all personal documents and files, it shows the following webpage:

It demands that victims pay using Bitcoin in order to receive the decryption key that allows them to recover their files.

We have been monitoring varying hits over the past few days for the signature that blocks this threat:

SonicWALL Gateway AntiVirus provides protection against this threat via the following signatures:

  • GAV: Dharma.RSM (Trojan)

  • GAV: Dharma.RSM_2 (Trojan)




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