Latest cybersecurity reporting from selected sources.

The Russian state-sponsored hacking group known as Turla has transformed its custom backdoor Kazuar into a modular peer-to-peer (P2P) botnet that's engineered for stealth and persistent access to compromised hosts

'Firestarter' Backdoor Can Survive Reboots, Upgrades and Standard FixesThe Cybersecurity and Infrastructure Security Agency issued an emergency directive warning a newly-discovered Cisco backdoor can survive routine remediation processes, forcing agencies to investigate edge devices that anchor federal firewall and VPN security.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has revealed that an unnamed federal civilian agency's Cisco Firepower device running Adaptive Security Appliance (ASA) software was compromised in September 2025 with a new malware called FIRESTARTER

Latest in long-running pwning of Cisco kit found in mystery Fed agency

Latest in long-running pwning of Cisco kit found in mystery Fed agency A US federal agency was successfully targeted by a previously unknown backdoor malware called Firestarter, according to CISA cybersnoops and their UK counterparts – neither of which disclosed the agency's name.…

CISA and NCSC co-released a Malware Analysis Report today on a Cisco ASA/Firepower backdoor that patching does not remove. Here is what it does, why Sigma will not save you, and what to do this week.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday released details of a backdoor named BRICKSTORM that has been put to use by state-sponsored threat actors from the People's Republic of China (PRC) to maintain long-term persistence on compromised systems

Chinese-Linked Malware Campaign Targets Critical Environments With Weak MonitoringU.S. and Canadian cyber authorities say Chinese state-backed actors used a backdoor dubbed BRICKSTORM to maintain long-term access into critical infrastructure, exploiting VMware environments to exfiltrate credentials and evade detection through encrypted covert channels.

State-sponsored actors tied to China continue to target VMware vSphere environments at government and technology organizations.

CISA Publishes Anatomy of Advanced Ivanti VPN MalwareHackers using Trojans connected to a malware family deployed by Chinese nation-state hackers are actively exploiting a now-patched vulnerability in Ivanti Connect Secure appliances. The malware "contains capabilities of a rootkit, dropper, backdoor, bootkit, proxy and tunneler."

CISA and the FDA are warning that Contec CMS8000 and Epsimed MN-120 patient monitors are open to meddling and data theft; Claroty Team82 flagged the vulnerability as an avoidable insecure design issue.

CISA has identified a backdoor in Contec CMS8000 devices that could allow unauthorized access to patient data and disrupt monitoring functions

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and the Food and Drug Administration (FDA) have issued alerts about the presence of hidden functionality in Contec CMS8000 patient monitors and Epsimed MN-120 patient monitors

The US Cybersecurity and Infrastructure Security Agency (CISA) is warning that Contec CMS8000 devices, a widely used healthcare patient monitoring device, include a backdoor that quietly sends patient data to a remote IP address and downloads and executes files on the device. [...]

PLUS: Chinese chipmaker Nexperia attacked; A Microsoft-signed backdoor; CISA starts scanning your malware; and more Infosec in brief US Congress nearly killed a reauthorization of FISA Section 702 last week over concerns that it would continue to allow warrantless surveillance of Americans, but an amendment to require a warrant failed to pass.…

China-linked APT group has been blamed for the attacks

Researchers have observed China's UNC4841 dropping the backdoor on Barracuda's email security appliances, in a spiraling cyber-espionage campaign.

The U.S. Cybersecurity & Infrastructure Security Agency (CISA) has discovered a new backdoor malware named 'Whirlpool' used in attacks on compromised Barracuda Email Security Gateway (ESG) devices. [...]

A China-nexus cyber espionage campaign rages on with the fourth backdoor to surface in the wild that takes advantage of the CVE-2023-2868 zero-day security bug — with severe threat of lateral movement, CISA warns.

Chinese threat actor used malware in attacks