Experts at the Cybaze Z-Lab have analyzed the latest iteration of the infamous GandCrab ransomware, version 5.0.
Malware researchers at Cybaze ZLab analyzed the latest version of the infamous GandCrab ransomware, version 5.0. Most of the infections have been observed in central Europe, but experts found evidence that the malicious code doesn’t infect Russian users. GandCrab operates like a classic ransomware, it encrypts all user files and drops some ransom notes on the infected machine.
The ransomware uses a pseudo-randomic extension (5 characters long), that is different for each infection (some of these extensions are: .txvpq, .rttmc, .mcbot, etc…).
The ransom note contains some information related to the infection: an ID (“fed0a66240f8743f”, in the image below), a “GANDCRAB KEY”, required to restore the original files, and some encrypted information about the infected system such as the username, the PC name, the domain, the operative system and the language.
Unlike GandCrab v4, this version is able to kill some processes associated with some popular applications (i.e. Word, Excel, SQLServer etc.) to allow the code to encrypt the files opened by these applications.
The payment process is implemented through the hidden service associated with the Tor address:
hxxp://gandcrabmfe6mnef[.]onion, which is the same used by previous versions of the malware.
Technical details, including IoCs and Yara Rules, are reported in the analysis shared by researchers at the ZLab.
You can download the full ZLAB Malware Analysis Report at the following URL:
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.