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A new information stealer has been found leveraging Lua bytecode for added stealth and sophistication, findings from McAfee Labs reveal. The cybersecurity firm has assessed it to be a variant of a known malware called RedLine Stealer owing to the fact that the command-and-control (C2) server  IP address  has been previously identified as associated with the malware. RedLine Stealer,  first documented  in March 2020, is typically delivered via email and malvertising campaigns, either directly or via  exploit kits  and loader malware like  dotRunpeX  and  HijackLoader . The off-the-shelf malware is capable of harvesting information from cryptocurrency wallets, VPN software, and web browsers, such as saved credentials, autocomplete data, credit card information, and geolocations based on the victims' IP addresses. Over the years, RedLine Stealer has been co-opted by several threat actors into their attack chains, making it a prevalent strai...

Threat actors associated with the notorious Emotet malware are continually shifting their tactics and command-and-control (C2) infrastructure to escape detection, according to new research from VMware. Emotet  is the work of a threat actor tracked as Mummy Spider (aka TA542), emerging in June 2014 as a banking trojan before morphing into an all-purpose loader in 2016 that's capable of delivering second-stage payloads such as ransomware. While the botnet's infrastructure was  taken down  as part of a coordinated law enforcement operation in January 2021, Emotet bounced back in November 2021 through another malware known as  TrickBot . Emotet's resurrection, orchestrated by the now-defunct Conti team, has since paved the way for Cobalt Strike infections and, more recently, ransomware attacks involving  Quantum and BlackCat . "The ongoing adaptation of Emotet's execution chain is one reason the malware has been successful for so long," researchers from VMwa...

It's easy to think your defenses are solid — until you realize attackers have been inside them the whole time. The latest incidents show that long-term, silent breaches are becoming the norm. The best defense now isn't just patching fast, but watching smarter and staying alert for what you don't expect. Here's a quick look at this week's top threats, new tactics, and security stories shaping the landscape. ⚡ Threat of the Week F5 Exposed to Nation-State Breach — F5 disclosed that unidentified threat actors broke into its systems and stole files containing some of BIG-IP's source code and information related to undisclosed vulnerabilities in the product. The company said it learned of the incident on August 9, 2025, although it's believed that the attackers were in its network for at least 12 months. The attackers are said to have used a malware family called BRICKSTORM, which is attributed to a China-nexus espionage group dubbed UNC5221. GreyNoise said it observed elevat...