Malware | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have disclosed details of a new malware loader called QuirkyLoader that's being used to deliver via email spam campaigns an array of next-stage payloads ranging from information stealers to remote access trojans since November 2024. Some of the notable malware families distributed using QuirkyLoader include Agent Tesla , AsyncRAT , Formbook , Masslogger , Remcos RAT , Rhadamanthys Stealer , and Snake Keylogger . IBM X-Force, which detailed the malware, said the attacks involve sending spam emails from both legitimate email service providers and a self-hosted email server. These emails feature a malicious archive, which contains a DLL, an encrypted payload, and a real executable. "The actor uses DLL side-loading, a technique where launching the legitimate executable also loads the malicious DLL," security researcher Raymond Joseph Alfonso said . "This DLL, in turn, loads, decrypts, and injects the final payload into its target process....

A Russian state-sponsored cyber espionage group known as Static Tundra has been observed actively exploiting a seven-year-old security flaw in Cisco IOS and Cisco IOS XE software as a means to establish persistent access to target networks. Cisco Talos, which disclosed details of the activity, said the attacks single out organizations in telecommunications, higher education and manufacturing sectors across North America, Asia, Africa and Europe. Prospective victims are chosen based on their "strategic interest" to Russia, it added, with recent efforts directed against Ukraine and its allies following the onset of the Russo-Ukrainian war in 2022. The vulnerability in question is CVE-2018-0171 (CVSS score: 9.8), a critical flaw in the Smart Install feature of Cisco IOS Software and Cisco IOS XE software that could allow an unauthenticated, remote attacker to trigger a denial-of-service (DoS) condition or execute arbitrary code. It's worth noting that the security ...

Cybersecurity researchers have demonstrated a new prompt injection technique called PromptFix that tricks a generative artificial intelligence (GenAI) model into carrying out intended actions by embedding the malicious instruction inside a fake CAPTCHA check on a web page. Described by Guardio Labs an "AI-era take on the ClickFix scam," the attack technique demonstrates how AI-driven browsers, such as Perplexity's Comet , that promise to automate mundane tasks like shopping for items online or handling emails on behalf of users can be deceived into interacting with phishing landing pages or fraudulent lookalike storefronts without the human user's knowledge or intervention. "With PromptFix, the approach is different: We don't try to glitch the model into obedience," Guardio researchers Nati Tal and Shaked Chen said . "Instead, we mislead it using techniques borrowed from the human social engineering playbook – appealing directly to its core des...

A 22-year-old man from the U.S. state of Oregon has been charged with allegedly developing and overseeing a distributed denial-of-service (DDoS)-for-hire botnet called RapperBot . Ethan Foltz of Eugene, Oregon, has been identified as the administrator of the service, the U.S. Department of Justice (DoJ) said. The botnet has been used to carry out large-scale DDoS-for-hire attacks targeting victims in over 80 countries since at least 2021. Foltz has been charged with one count of aiding and abetting computer intrusions. If convicted, he faces a maximum penalty of 10 years in prison. In addition, law enforcement authorities conducted a search of Foltz's residence on August 6, 2025, seizing administrative control of the botnet infrastructure. "RapperBot, aka 'Eleven Eleven Botnet' and 'CowBot,' is a Botnet that primarily compromises devices like Digital Video Recorders (DVRS) or Wi-Fi routers at scale by infecting those devices with specialized malware,"...

Threat actors are exploiting a nearly two-year-old security flaw in Apache ActiveMQ to gain persistent access to cloud Linux systems and deploy malware called DripDropper . But in an unusual twist, the unknown attackers have been observed patching the exploited vulnerability after securing initial access to prevent further exploitation by other adversaries and evade detection, Red Canary said in a report shared with The Hacker News. "Follow-on adversary command-and-control (C2) tools varied by endpoint and included Sliver , and Cloudflare Tunnels to maintain covert command and control over the long term," researchers Christina Johns, Chris Brook, and Tyler Edmonds said. The attacks exploit a maximum-severity security flaw in Apache ActiveMQ ( CVE-2023-46604 , CVSS score: 10.0), a remote code execution vulnerability that could be exploited to run arbitrary shell commands. It was addressed in late October 2023. The security defect has since come under heavy exploitation...