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:
- Two hacking groups responsible for huge spike in hacked Magento 2.x stores
June 12, 2019
Two hacker groups are responsible for a huge spike in the number of hacked Magento 2.x shopping sites, according to Willem de Groot, founder of Sanguine Security. This is now the third month in a row when the number of hacked Magento 2.x sites has doubled, after it previously doubled from March to April, and again ...
- RAMBleed Attack – Flip Bits to Steal Sensitive Data from Computer Memory
June 12, 2019
A team of cybersecurity researchers yesterday revealed details of a new side-channel attack on dynamic random-access memory (DRAM) that could allow malicious programs installed on a modern system to read sensitive memory data from other processes running on the same hardware. Dubbed RAMBleed and identified as CVE-2019-0174, the new attack is based on a well-known class of DRAM side ...
- Intel NUC Firmware Open to Privilege Escalation, DoS and Information Disclosure
June 12, 2019
Intel has patched seven high-severity vulnerabilities in its mini PC NUC kit firmware. Intel has patched seven high-severity vulnerabilities in the system firmware of its Intel NUC (short for Next Unit of Computing), a mini-PC kit used for gaming, digital signage and more. Overall, the chip-maker patched 25 vulnerabilities across various platforms this week – including eight ...
- New FormBook Dropper Harbors Obfuscation, Persistence
June 12, 2019
Never-before-seen dropper found in FormBook samples that has increased persistence and obfuscation capabilities. Researchers are warning that a future data-theft attack may be brewing after discovering a new sample of the FormBook malware, with a never-before-seen dropper — i.e. a malicious file that is used in the initial infection stage and installs malware on the system. FormBook, ...
- FBI Issues Warning on ‘Secure’ Websites Used For Phishing
June 10, 2019
The U.S. Federal Bureau of Investigation (FBI) issued a public service announcement regarding TLS-secured websites being actively used by malicious actors in phishing campaigns. Internet users are accustomed by now to always look at the padlock next to the web browser’s address bar to check if the current page is served by a website secured using a ...
- MuddyWater Resurfaces, Uses Multi-Stage Backdoor POWERSTATS V3 and New Post-Exploitation Tools
June 10, 2019
We found new campaigns that appear to wear the badge of MuddyWater. Analysis of these campaigns revealed the use of new tools and payloads, which indicates that the well-known threat actor group is continuously developing their schemes. We also unearthed and detailed our other findings on MuddyWater, such as its connection to four Android malware ...