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Linux Backdoor, BPFDoor
BPFDoor is an evasive Linux backdoor utilized by Chinese Red Menshen threat actors, ideal for espionage and persistent attacks. Researched by Kevin Beaumont, PwC, and the Sandfly Security Team, BPFDoor uses a Berkeley Packet Filter sniffer for stealthy network monitoring and packet sending. It operates at the network layer, bypassing firewall rules without needing open ports. The malware, requiring root permissions for execution, is set up as an in-memory implant with persistence through scripts or scheduled tasks. Attackers control the implant by modifying firewall configurations and using a "magic" password. Targets include education, government, logistics, and telecommunication sectors in Asia and the Middle East.
Ransomware Forces Closure of Lincoln College
After 157 years, Lincoln College in Illinois will close on May 13th, 2022, due to financial losses from the COVID-19 pandemic and a ransomware attack in December 2021. The attack disrupted admissions and access to institutional data, making it impossible to sustain operations. No personal information was exposed.
Quantum Ransomware Analyzed by Cybereason
Cybereason analyzes Quantum ransomware, a rebrand of Mount Locker, Astro Locker, and Xing Locker. The ransomware group uses IcedID malware for initial infection, with rapid attacks leading to a Time-to-Ransom under 4 hours. Quantum follows a double extortion model, leaking data if victims don't respond within 72 hours.
Windows Event Logs Abused for Malware
In February 2022, Kaspersky uncovered a stealthy malware campaign using Windows event logs for concealment. The attack, starting in September 2021, involved tools like Cobalt Strike and Silent Break, injecting malware into system processes and hiding shellcode in event logs for persistence.
National Emergency Declared in Costa Rica
Costa Rican President Rodrigo Chaves declared a national emergency on May 8th, 2022, following Conti ransomware attacks on multiple government agencies. The attacks resulted in a 672 GB data leak, with 97% of the stolen data already exposed. The attacks are aimed at financial gain, with threats of more severe attacks.
New REvil Malware
REvil ransomware has resurfaced with a new malware variant, confirmed by security researchers. The new encryptor was identified by AVAST researcher Jakub Kroustek, with code compiled on April 26th, 2022, and version incremented to 2.08. This suggests a continuation from when REvil supposedly shut down.
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