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:
- Oracle grapples with dual data breaches
March 31, 2025
Oracle is dealing with the fallout of a double data breach — one exposing patient data at US hospitals, and another raising concerns about its cloud security. Reports over the weekend suggest a breach at Oracle Health, formerly known as Cerner, has impacted multiple US healthcare organisations and hospitals. Threat actors are believed to have stolen ...
- A Deep Dive into Water Gamayun’s Arsenal and Infrastructure
March 28, 2025
Water Gamayun, a suspected Russian threat actor also known as EncryptHub and Larva-208, has been exploiting the MSC EvilTwin (CVE-2025-26633), a zero-day vulnerability that was patched on March 11. In the first installment of this two-part series, Trend Research discussed in depth its discovery of an Water Gamayun campaign exploiting this vulnerability. In this blog entry, ...
- Again and again, NSO Group’s customers keep getting their spyware operations caught
March 28, 2025
On Thursday, Amnesty International published a new report detailing attempted hacks against two Serbian journalists, allegedly carried out with NSO Group’s spyware Pegasus. The two journalists, who work for the Serbia-based Balkan Investigative Reporting Network (BIRN), received suspicious text messages including a link — basically a phishing attack, according to the nonprofit. In one case, Amnesty ...
- Mozilla Releases Security Updates for Firefox
March 28, 2025
Mozilla has released security updates to address one critical vulnerability in Firefox and Firefox ESR. Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in Firefox’s Inter-process Communication (IPC) code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. Exploitation ...
- Google Releases Security Updates for Chrome
March 28, 2025
Google has released Chrome version 134.0.6998.177/.178 to address a high severity vulnerability, reported as exploited in the wild. A remote attacker could exploit this vulnerability to escape a sandbox via a malicious file. Google is aware that an exploit for CVE-2025-2783 exists in the wild. Affected organisations are encouraged to review the Chrome Release 134.0.6998.177/.178 Stable ...
- Cyberattacks climbing across Caribbean
March 28, 2025
Ransomware gangs FOG and Akira continue to be the main culprits behind a number of recent cyberattacks plaguing businesses locally and across the Caribbean, a cyber-security expert has indicated. According to Rory Ebanks, director of cybersecurity at Symptai Consulting Limited, the two ransomware gangs, which both emerged in the last three years, primarily exploit vulnerabilities in ...