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FIN8 Compromised an EMEA Retailer
The financially-driven threat group, FIN8, targeted an EMEA retailer on April 30th, 2023, leading to the exfiltration of 61GB of data. Darktrace identifies SSL connections, lateral movements, and potential DCSync attacks as key indicators. The initial breach point remains unidentified, but phishing, a known strategy of FIN8, is suspected. Nine devices, including five administrative ones, played roles in this breach.
CISA: Valid Accounts A Prevailing Technique for Attacks in 2022
CISA's risk and vulnerability assessment has identified "Valid Accounts" as the most prominent attack technique in 2022 against government and critical infrastructure organizations. Accounting for over half of initial access attacks and a significant portion of other tactic categories, this technique is a key concern. Other top techniques include PowerShell for execution, LLMNR/NBT-NS Poisoning & SMB Relay for credential access, and Exfiltration Over C2 Channel for data exfiltration. The report emphasizes that even minor changes to technology controls can enhance security, as threat actors largely continue to follow established patterns without significant deviation.
Wiz Discovers Two Vulnerabilities in Ubuntu's OverlayFS module
Wiz researchers Sagi Tzadik and Shir Tamari have discovered two privilege escalation vulnerabilities (CVE-2023-2640, CVE-2023-32629) in Ubuntu's OverlayFS module, potentially affecting 40% of Ubuntu users. These vulnerabilities arose from conflicts between Ubuntu's custom configurations and subsequent modifications to the module by the Linux kernel project. Ubuntu has released patches to rectify the vulnerabilities, and users are urged to apply them immediately, as proof-of-concept exploits have been made public.
Casbaneiro Banking Trojan Strikes Financial Institutions for Credential Theft
The Casbaneiro banking Trojan, active since 2018, has been targeting financial institutions primarily in Latin America. Recently, it expanded its reach to North and South America. Sygnia's findings reveal a new User Account Control (UAC) bypass technique that avoids detection. The attack usually starts with a phishing email, utilizing fodhelper.exe to execute commands with high integrity, thus bypassing UAC prompts. Financial institutions need to be aware of these evolving tactics.
Nitrogen Malware Bonds to the Trend of Impersonating Popular Software
The Nitrogen malware is impersonating popular software like AnyDesk and WinSCP to target technology and non-profit organizations in North America. Researchers from Sophos have identified the infection chain as a potential precursor to ransomware deployment. The campaign begins through malicious advertisements and progresses through an elaborate process that includes privilege elevation and potential Cobalt Strike activity. The discovery of this campaign underscores the need for organizations to be vigilant against deceptive threats.
Clop Borrows from BlackCat to Up Their Extortion Game
The Clop ransomware group has adopted a new extortion method, using data from the significant MOVEit breach to create clearview websites dedicated to specific compromised companies. Unlike darkweb platforms, these sites are accessible to conventional search engines, allowing higher web traffic. Victims include PWC, Anon, EY, Kirkland, and TD Ameritrade. Although these sites have been taken down, the group's use of clearview websites signifies a concerning escalation in their tactics. It's unclear who was responsible for the takedowns.
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