Latest cybersecurity reporting from selected sources.

A China-nexus cyber espionage group has been observed deploying a BSD variant of a known backdoor called BRICKSTORM, as well as two other malware families codenamed PLENET (aka GRIMBOLT) and AGENTPSD to target Linux systems

The threat actor known as Harvester has been attributed to a new Linux version of its GoGra backdoor deployed as part of attacks likely targeting entities in South Asia

A Linux variant of the GoGra backdoor uses legitimate Microsoft infrastructure, relying on an Outlook inbox for stealthy payload delivery. [...]

Cybersecurity researchers have discovered two new malware families, including a modular Apple macOS backdoor called CHILLYHELL and a Go-based remote access trojan (RAT) named ZynorRAT that can target both Windows and Linux systems

A new Linux backdoor called 'WolfsBane' has been discovered, believed to be a port of Windows malware used by the Chinese 'Gelsemium' hacking group. [...]

Cybersecurity researchers have flagged a new malware campaign that infects Windows systems with a Linux virtual instance containing a backdoor capable of establishing remote access to the compromised hosts

The Chinese-speaking threat actor known as Earth Lusca has been observed using a new backdoor dubbed KTLVdoor as part of a cyber attack targeting an unnamed trading company based in China

A previously undocumented cross-platform malware codenamed Noodle RAT has been put to use by Chinese-speaking threat actors either for espionage or cybercrime for years

The ELF backdoor, initially thought to be a variant of existing malware, has a Windows and a Linux version

Cybersecurity researchers have identified a set of 116 malicious packages on the Python Package Index (PyPI) repository that are designed to infect Windows and Linux systems with a custom backdoor

While monitoring Earth Lusca, we discovered an intriguing, encrypted file on the threat actor's server — a Linux-based malware, which appears to originate from the open-source Windows backdoor Trochilus, which we've dubbed SprySOCKS due to its swift behavior and SOCKS implementation

Suspected Chinese hackers exploited a recently disclosed FortiOS SSL-VPN vulnerability as a zero-day in December, targeting a European government and an African MSP with a new custom 'BOLDMOVE' Linux and Windows malware. [...]

State-backed Chinese hackers have developed a Linux variant for the SideWalk backdoor used against Windows systems belonging to targets in the academic sector. [...]