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CACTUS Ransomware Strikes Large Enterprises
CACTUS ransomware, first observed in March 2023, targets large enterprises by exploiting VPN vulnerabilities. The ransomware uses tools like Chisel, Rclone, and custom scripts to disable security software, set up SSH backdoors, and maintain persistence. Attackers perform extensive reconnaissance, install remote access software, gather credentials, and exfiltrate data using Rclone. The ransomware encryptor requires a key for execution to evade detection.
Royal Ransomware Continues to Spread, With US Organizations Hit Hardest
Royal ransomware, a private group of former Conti members, has heavily targeted US organizations, accounting for 64% of its victims. Utilizing SEO poisoning and malvertising, the group initiates complex infection chains leading to malware deployment. Affected industries include manufacturing, healthcare, and professional services. The ransomware uses tools like Cobalt Strike, BATLOADER, and Rclone for lateral movement and data exfiltration.
Ransomware Attack Limits Operations in South Carolina Country
Spartanburg County in South Carolina is dealing with a ransomware attack that has restricted its IT and phone networks since April 27, 2023. Essential services like 9-1-1 remain operational. The county is investigating the incident with security experts and law enforcement, though no ransomware group has claimed responsibility yet.
Ukrainian CERT Warns of APT28 Phishing Attacks Disguised as Windows Updates
Ukrainian CERT warns that APT28 (Fancy Bear) is targeting Ukrainian government bodies with phishing attacks disguised as Windows updates. Emails, appearing to be from system administrators, trick recipients into running PowerShell scripts that collect system information and exfiltrate it to the Mocky service. These attacks use sender addresses formed using employee surnames and initials.
Mac Users Beware: Threat Actor Offers New AMOS Stealer on Telegram for Sale
Atomic macOS Stealer (AMOS) is a new information-stealing malware targeting macOS platforms, sold on Telegram for $1000. It extracts keychain passwords, browser credentials, system information, and cryptocurrency wallet data. AMOS uses fake password prompts to gain elevated privileges and exfiltrates data to the attacker's C2. This malware poses a growing threat to macOS users.
Tonto Team Employs CHM files to Infiltrate Systems with RATs
The Chinese-state-sponsored group Tonto Team is targeting Korean construction, education, and government sectors with malicious CHM files. These files sideload a malicious DLL, execute ReVBShell, and drop the Bisonal remote access trojan (RAT). ASECS's investigation reveals sophisticated methods, including abusing anti-malware product files and establishing persistence via registry keys.
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