Cisco Talos discovered an ongoing malicious campaign operated by a financially motivated threat actor targeting users, predominantly in Poland and Germany.
Someone has been quietly backdooring selected Juniper routers around the world in key sectors including semiconductor, energy, and manufacturing, since at least mid-2023.
The devices were infected with what appears to be a variant of cd00r, a publicly available "invisible backdoor" designed to operate stealthily on a victim's machine by monitoring network traffic for specific conditions before activating.
In an incident response in Q4 of 2024, GuidePoint Security identified evidence of a threat actor utilizing a Python-based backdoor to maintain access to compromised endpoints. The threat actor later leveraged this access to deploy RansomHub encryptors throughout the entire impacted network. ReliaQuest documented an earlier version of this malware on their website in February 2024.
Imagine this: an OpenSSH backdoor is discovered, maintainers rush to push out a fixed release package, security researchers trade technical details on mailing lists to analyze the backdoor code. Speculation abounds on the attribution and motives of the attacker, and the tech media pounces on the story. A near miss of epic proportions, a blow to the fabric of trust underlying open source development, a stark reminder of the risks of supply-chain attacks. Equal measures brilliant and devious.
We studied the most secure static encrypted nonce variant of "MIFARE Classic compatible" cards -- meant to resist all known card-only attacks -- and developed new attacks defeating it, uncovering a hardware backdoor in the process. And that's only the beginning...
French security services firm Quarkslab has made an eye-popping discovery: a significant backdoor in millions of contactless cards made by Shanghai Fudan Microelectronics Group, a leading chip manufacturer in China.
Threat actors deliver fake software updates on websites for popular browsers: Sites with a high search engine ranking are at an increased risk.