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According to the 360 Security Center report, Grandcrab employs various methods for unauthorized intrusion into victims' devices, specifically through spam email, disguising as harmless software or keygen utilities, exploiting vulnerabilities in Struts and ApacheTomcat, and security loopholes in JBoss and
GrandCrab ransomware exploits known vulnerabilities for infection.
The most common attack vector of GrandCrab involves utilizing malicious emails packaged as harmful attachments designed to download and execute on the victim's computer.
The evolving versions and new variants of GrandCrab are becoming increasingly cunning, adding enhanced infection capabilities and new attack methods, collectively making this ransomware more dangerous.
Notably, before attempting to encrypt crucial data on the victim's computer, GrandCrab first deletes all user's automatic backups to ensure the victim is compelled to pay ransom to recover their vital data.
GrandCrab employs a variety of attack vectors, compelling victims to pay ransom.
During execution, the latest variant of GrandCrab initiates scanning all document formats. Upon finding a target, it encrypts and renames the file using a randomly selected 5-character extension.
After encrypting the chosen hostage files, GrandCrab begins sending ransom messages, providing victims with payment instructions and data recovery guidance, accessible through the payment portal at gandcrabmfe6mnef.onion.
Furthermore, once successfully encrypting files, GrandCrab restarts the infiltrated device, displaying ransom messages immediately after the system reboot without further delay.
Some familiar solutions to protect user devices from GrandCrab and other ransomware include: regularly backing up data, being cautious when clicking links or opening email attachments from unknown sources, updating the operating system and the latest application versions, and installing AntiMalware software to detect and prevent ransomware; you can refer to using Malwarebytes AntiMalware for scanning and checking for malicious code on your computer.
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