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LockFile ransomware adopts ProxyShell and PetitPotam vulnerabilities

The new LockFile ransomware exploits recently discovered ProxyShell and PetitPotam vulnerabilities to increase its chances of hacking and encrypting corporate networks.

Experts from TG Soft and well-known information security researcher Kevin Beaumont reported about the new threat. They write that LockFile operators are using recently discovered vulnerabilities, collectively known as ProxyShell, to attack Microsoft Exchange servers, from where the attack eventually spreads to the internal networks of companies.

We have analysed a case of attack by LockFile Ransomware that used Exchange exploit and group policy to attack an entire network. Attacker exploited MS Exchange server with the Proxyshell discovered by Orange Tsai. Inside the attachment FileAttachment.txt there is the webshell.TG Soft experts share their observations on Twitter.

ransomware LockFile ProxyShell and PetitPotam

According to Symantec, after infiltrating the victim’s network, LockFile exploits another recent vulnerability, PetitPotam, to take control of the company’s domain controller, and then deploy payloads to encrypt the data on all available workstations.

Symantec writes that the hack group has already attacked at least ten organizations, most of which are located in the United States and Asia. Organizations from the following sectors have already become victims of hackers: financial services, manufacturing, mechanical engineering, law, business services, travel and tourism.

LockFile ransomware was first spotted on a US financial institution’s network on July 20, 2021, and the last activity was recorded as recently as August 20,”the researchers said.

At the same time, experts note the similarity of the ransom notes that LockFile leaves behind with the notes that the LockBit ransomware used.

ransomware LockFile ProxyShell and PetitPotam

In addition, the hackers’ contact email hints at a possible connection with the Conti ransomware: contact @contipauper[.]com. Bleeping Computer recalls that recently one of Conti’s disgruntled partners has leaked manuals and technical manuals used by hackers to train their accomplices. Journalists believe that the appearance of LockFile may be associated with this person.

Let me also remind you that I recently talked about how Over 2000 Exchange Servers Hacked Using ProxyShell Exploit.

Vladimir Krasnogolovy

Vladimir is a technical specialist who loves giving qualified advices and tips on GridinSoft's products. He's available 24/7 to assist you in any question regarding internet security.

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