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Aman Mishra@gbhackers.com
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ESET researchers have uncovered connections between RansomHub affiliates and other ransomware groups, including Medusa, BianLian, and Play. This link is established through the shared use of EDRKillShifter, a custom tool designed to disable endpoint detection and response (EDR) software on compromised systems. EDRKillShifter utilizes a "Bring Your Own Vulnerable Driver" (BYOVD) tactic, leveraging a legitimate but vulnerable driver to terminate security solutions, ensuring the smooth execution of ransomware encryptors without detection.
This sharing of tools highlights an evolving trend in the ransomware landscape, where groups collaborate and repurpose tooling from rivals. ESET's analysis reveals that even closed ransomware-as-a-service (RaaS) operations like Play and BianLian, known for their consistent use of core tools, have members utilizing EDRKillShifter in their attacks. RansomHub, a relatively new player, quickly rose to prominence in the ransomware scene after emerging in February 2024, dominating the landscape by recruiting affiliates from disrupted groups such as LockBit and BlackCat. The tool, custom-developed by RansomHub, is offered to its affiliates as part of its RaaS program.
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Mandvi@Cyber Security News
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The FishMonger APT, a Chinese cyber-espionage group with ties to the cybersecurity contractor I-SOON, has been implicated in a global espionage operation known as Operation FishMedley. This campaign, active in 2022, targeted a diverse range of entities, including governments, non-governmental organizations (NGOs), and think tanks across Asia, Europe, and the United States. These findings come as the US Department of Justice unsealed an indictment against I-SOON employees for their alleged involvement in espionage campaigns spanning from 2016 to 2023.
The attacks involved sophisticated malware implants such as ShadowPad, Spyder, and SodaMaster, tools frequently associated with China-aligned threat actors. These implants facilitated data theft, surveillance, and network penetration. One case revealed attackers used the Impacket tool to escalate privileges, execute commands, and extract sensitive authentication data from a US-based NGO. ESET's independent research confirms FishMonger is an espionage team operated by I-SOON, highlighting the ongoing threat posed by China-aligned APT groups to sensitive sectors worldwide.
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CISO2CISO Editor 2@ciso2ciso.com
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A new China-aligned cyber espionage group named PlushDaemon has been discovered conducting a supply chain attack against a South Korean VPN provider, IPany. The group compromised the VPN provider's software installer, replacing it with a malicious version that deploys the custom SlowStepper malware. This malware is a sophisticated backdoor with a large toolkit composed of around 30 modules, programmed in C++, Python, and Go, designed for espionage activities. The initial access vector for the group is typically by hijacking legitimate software updates of Chinese applications, but this supply chain attack marks a significant departure from their usual tactics.
ESET Research identified the attack after detecting malicious code in a Windows NSIS installer downloaded from the IPany website in May 2024. The compromised installer included both the legitimate VPN software and the SlowStepper backdoor. ESET researchers notified IPany, and the malicious installer has since been removed. PlushDaemon, active since at least 2019, is believed to be the exclusive user of the SlowStepper malware and has targeted individuals and entities in China, Taiwan, Hong Kong, South Korea, the US, and New Zealand. The group is also known to gain access via vulnerabilities in legitimate web servers.
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