SonicWall devices infected by malware that survives firmware upgrades

A suspected Chinese hacking campaign has been targeting unpatched SonicWall Secure Mobile Access appliances to install custom malware that establishes long-term persistence for cyber espionage campaigns.

The deployed malware is customized for SonicWall devices and is used to steal user credentials, provide shell access to the attackers, and even persist through firmware upgrades.

The malware used on SonicWall devices consists of an ELF binary, the TinyShell backdoor, and several bash scripts that show a deep understanding of the targeted network devices.

Recent flaws disclosed by SonicWall [1, 2, 3] that impacted SMA devices allowed unauthenticated access to devices, which could then be used in campaigns like this one.

If one is found, the malware injects itself into the upgrade package to survive even after firmware upgrades.

Similar to the SonicWall campaign, the threat actors behind the Fortinet attacks showed intimate knowledge about the devices and how they operated to inject custom malware for persistence and data theft.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.
This field is for validation purposes and should be left unchanged.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:
GET STARTED TODAY

Tell us About your Needs
Get an Answer the Same Business Day

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.

What happens next:

  • We reach out to learn about your objectives
  • We work together to define your project’s scope
  • You get an all-inclusive, no engagement proposal
PCI-DSS
This field is for validation purposes and should be left unchanged.

BOOK A MEETING

Enter your Email Address

This field is for validation purposes and should be left unchanged.

* No free email provider (e.g: gmail.com, hotmail.com, etc.)

2024 EDITION

PENETRATION TESTING Buyer's Guide

Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.
This site is registered on wpml.org as a development site. Switch to a production site key to remove this banner.