FortiGuard Labs is aware of a report the infamous BlackCat ransomware group has updated their infostealer tools. Dubbed Exmatter and Eamfo, the former is a data exfiltration tool which a newer version has a code for file corruption and the latter is a credential lifter for Veeam, which is backup software.Why is this Significant?This is significant because Blackcat is one of the active Ransomware-as-a-Service (RaaS) providers and their newly updated data exfiltration tool “Exmatter” is now capable of making processed files unusable.What is BlackCat?BlackCat, (also known as ALPHV and Noberus), is a relatively new Ransomware-as-a-Service (RaaS) and a ransomware variant with the same name. As a RaaS provider, it develops and offers various tools including ransomware, and recruits affiliates for corporate intrusions, encrypting files on the victim’s network and stealing confidential files from it for financial gain. BlackCat ransomware is written in the Rust programming language.FortiGuard Labs previously released Threat Signal on Blackcat. See the Appendix for a link to “Meet Blackcat: New Ransomware Written in Rust on the Block”. What is Exmatter?According to security vendor Symantec, Exmatter is a data exfiltration tool that was previously used by a BlackMatter ransomware affiliate. The tool is designed to steal various Microsoft Office files (Word, Excel and PowerPoint) as well as image, email and archive files. It supports FTP, SFTP and WebDav for file transfer of exfiltrated information. The newer version has code to corrupt files.What is Eamfo?Eamfo is a tool to steal credentials from Veeam backup software.What is the Status of Protection?FortiGuard Labs detects reported Exmatter and Eamfo tools with the following AV signatures:MSIL/Agent.DRB!trMSIL/Agent.DRB!tr.spyMSIL/Agent.7AAD!trW32/Crypt!trW32/PossibleThreatPossibleThreatPossibleThreat.PALLAS.HFortiGuard Labs has the following AV protection in place for known BlackCat ransomware:W32/Filecoder_BlackCat.A!tr.ransomW32/Ransom_Win32_BLACKCAT.YNCHH!tr.ransomW32/Ransom_Win32_BLACKCAT.YXCDU!tr.ransomW32/BlackCat.26B0!tr
More Stories
ZDI-CAN-25373: Microsoft
A CVSS score 7.0 AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H severity vulnerability discovered by 'Peter Girnus - Trend Micro Zero Day Initiative' was reported to...
DSA-5774-1 ruby-saml – security update
It was discovered that ruby-saml, a SAML library implementing the client side of a SAML authorization, does not properly verify...
USN-6968-2: PostgreSQL vulnerability
USN-6968-1 fixed CVE-2024-7348 in PostgreSQL-12, PostgreSQL-14, and PostgreSQL-16 This update provides the corresponding updates for PostgreSQL-9.5 in Ubuntu 16.04 LTS....
USN-7015-2: Python vulnerabilities
USN-7015-1 fixed several vulnerabilities in Python. This update provides one of the corresponding updates for python2.7 for Ubuntu 16.04 LTS,...
USN-7027-1: Emacs vulnerabilities
It was discovered that Emacs incorrectly handled input sanitization. An attacker could possibly use this issue to execute arbitrary commands....
USN-7024-1: tgt vulnerability
It was discovered that tgt attempts to achieve entropy by calling rand without srand. The PRNG seed is always 1,...