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:
- Ensiko: A Webshell With Ransomware Capabilities
July 27, 2020
Ensiko is a PHP web shell with ransomware capabilities that targets various platforms such as Linux, Windows, macOS, or any other platform that has PHP installed. The malware has the capability to remotely control the system and accept commands to perform malicious activities on the infected machine. It can also execute shell commands on an infected ...
- NSA Urgently Warns on Industrial Cyberattacks, Triconex Critical Bug
July 24, 2020
The U.S. National Security Agency (NSA) and the Cybersecurity and Infrastructure Security Agency (CISA) have issued an alert warning that adversaries could be targeting critical infrastructure across the U.S. Separately, ICS-CERT issued an advisory on a critical security bug in the Schneider Electric Triconex TriStation and Tricon Communication Module. These safety instrumented system (SIS) controllers are ...
- OilRig Targets Middle Eastern Telecom Organization and Adds Novel C2 Channel with Steganography to Its Inventory
July 22, 2020
While analyzing an attack against a Middle Eastern telecommunications organization, Unit 42 has discovered a variant of an OilRig-associated tool we call RDAT using a novel email-based command and control (C2) channel that relied on a technique known as steganography to hide commands and data within bitmap images attached to emails. In May 2020, Symantec published ...
- MATA: Multi-platform targeted malware framework
July 22, 2020
As the IT and OT environment becomes more complex, adversaries are quick to adapt their attack strategy. For example, as users’ work environments diversify, adversaries are busy acquiring the TTPs to infiltrate systems. Recently, we reported to our Threat Intelligence Portal customers a similar malware framework that internally we called MATA. The MATA malware framework ...
- Going Down the Spyware Rabbit Hole with SilkBean Mobile Malware
July 22, 2020
An Android spyware attack was recently discovered that targeted the Uyghur ethnic minority group – since 2013. In this in-depth Threatpost podcast Christoph Hebeisen, who leads the Security Intelligence Research Division at Lookout, shares a behind-the-scenes look at how his team discovered and tracked three never-before-seen surveillanceware tools, dubbed SilkBean, GoldenEagle and CarbonSteal. Read more… Source: ThreatPost
- Threat Brief: Microsoft DNS Server Wormable Vulnerability CVE-2020-1350
July 21, 2020
In July 2020, Microsoft released a security update, CVE-2020-1350 | Windows DNS Server Remote Code Execution Vulnerability, for a new remote code execution (RCE) vulnerability. This vulnerability exists within the Microsoft Windows Domain Name System (DNS) Server due to the improper handling of certain types of requests, specifically over port 53/TCP. Exploitation of this vulnerability is ...