Rapid7 tracked a set of Linux samples that blend into the software and device conventions of the telecom environments they target. The set spans a newly observed BPFDoor variant, a BPF Rekoobe build seen against South Korean targets, a dropper, and six builds of a Linux implant Rapid7 researchers track as AVERAT, deployed against Taiwanese appliances. Additionally, researchers provide source code details of the Rapid7 BPFDoor controller introduced in our April 2026 blog, Stealthy BPFDoor Variants are a Needle That Looks Like Hay.
The chain uses two binaries. A dropper writes a shell script to the appliance’s storage mount and executes it. The script stages both payloads into /sbin under the names ntpdate and udevds, launches them, and deletes each file ten seconds later while the processes continue running. One of those payloads is the dropper itself, re-executing as a resident watchdog, leaving both processes running without an on-disk image.
Read more…
Source: Rapid7 News
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- New macOS malware chain could cause a major security headache
November 26, 2025
North Korean state-sponsored threat actors are targeting macOS users with new malware, utilizing a strategy that combines two popular approaches – fake job ads, and ClickFix, experts have warned. Security researchers Jamf confirmed they have spotted attacks in the wild using ClickFix, an attack method in which the victim is presented with a fake problem, and ...
- Multiple London councils hit by ‘cyber attack’
November 26, 2025
Several London councils have been hit by a “cyber attack” which could have compromised residents’ data. Kensington and Chelsea, Hammersmith and Fulham, and Westminster City councils said they have been responding to a “cyber security issue” since Monday morning. The councils, which share a number of IT systems, added they are working with the “help of ...
- FBI: Account Takeover Fraud via Impersonation of Financial Institution Support
November 25, 2025
The FBI warns of cyber criminals impersonating financial institutions to steal money or information in Account Takeover (ATO) fraud schemes. The cyber criminals target individuals, businesses, and organizations of varied sizes and across sectors. In ATO fraud, cyber criminals gain unauthorized access to the targeted online financial institution, payroll, or health savings account, with the ...
- The Dual-Use Dilemma of AI: Malicious LLMs
November 25, 2025
A fundamental challenge with large language models (LLMs) in a security context is that their greatest strengths as defensive tools are precisely what enable their offensive power. This issue is known as the dual-use dilemma, a concept typically applied to technologies like nuclear physics or biotechnology, but now also central to AI. Any tool powerful enough ...
- US banks scramble to assess data theft after hackers breach financial tech firm
November 24, 2025
Several U.S. banking giants and mortgage lenders are reportedly scrambling to assess how much of their customers’ data was stolen during a cyberattack on a New York financial technology company earlier this month. SitusAMC, which provides technology for over a thousand commercial and real estate financiers, confirmed in a statement over the weekend that it had ...
- From Extortion to E-commerce: How Ransomware Groups Turn Breaches into Bidding Wars
November 24, 2025
Ransomware has evolved from simple digital extortion into a structured, profit-driven criminal enterprise. Over time, it has led to the development of a complex ecosystem where stolen data is not only leveraged for ransom, but also sold to the highest bidder. This trend first gained traction in 2020 when the Pinchy Spider group, better known as ...