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:
- Why bother cracking PCs? Spot o’ malware on PLCs… Done. Industrial control network pwned
December 12, 2017
Security researchers have demonstrated a new technique for hacking air-gapped industrial control system networks, and hope their work will encourage the development of more robust defences for SCADA-based systems. Air-gapped industrial networks are thought to be difficult if not impossible to hack partly because they are isolated from the internet and corporate IT networks. However, in ...
- Process Doppelgänging: New Malware Evasion Technique Works On All Windows Versions
December 7, 2017
A team of security researchers has discovered a new malware evasion technique that could help malware authors defeat most of the modern antivirus solutions and forensic tools. Dubbed Process Doppelgänging, the new fileless code injection technique takes advantage of a built-in Windows function and an undocumented implementation of Windows process loader. Ensilo security researchers Tal Liberman and Eugene Kogan, who ...
- Hackers are scanning computers worldwide for open Bitcoin and Ethereum wallets…
November 27, 2017
Security researcher Didier Stevens setup a trap, or in digital security terms – a “honeypot”. Think of it as digital sting operation, where someone puts a server online open to attack – but nothing of value is really there, it’s only there to record the attacks as they happen. The logs of these honeypots revealed hackers ...
- New Mirai Variant Found Spreading like Wildfire
November 23, 2017
A security researcher reportedly discovered a new variant of Mirai (identified by Trend Micro as ELF_MIRAI family) that is quickly spreading. A notable increase in traffic on port 2323 and 23 was observed over the weekend, with around 100 thousand unique scanner IPs coming from Argentina. The release of the Proof-of-Concept (PoC) exploit code in a public vulnerabilities database was ...
- HP patches severe code execution bug in enterprise printers
November 23, 2017
HP has issued firmware patches to fix a security flaw which allowed attackers to perform remote code execution attacks on enterprise-grade printers. FoxGlove Security researchers issued an advisory disclosing the technical details of the bug, CVE-2017-2750, earlier this week. The team tested out HP’s PageWide Enterprise Color MFP 586 and the HP Color LaserJet Enterprise M553 models, and found they ...
- Google security report finds phishing to be biggest threat
November 14, 2017
In an effort to better understand how users accounts get ‘hijacked,’ Google collaborated with the University of California at Berkeley to investigate how the black markets responsible for obtaining and selling user credentials operate. The study took place from March 2016 to March 2017 and the research focused primarily on tracking several large black markets trading ...