Hiding WordPress malware in the mu-plugins directory to avoid detection

Sucuri researchers spotted threat actors deploying WordPress malware in the mu-plugins directory to evade security checks. In February, Sucuri warned of threat actors exploiting WordPress mu-plugins, which auto-load without activation, to maintain persistence and evade detection by hiding backdoors in the plugin directory. “Unlike regular plugins, must-use plugins are automatically loaded on every page load, […]

April 1, 2025
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U.S. CISA adds Cisco Smart Licensing Utility flaw to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Cisco Smart Licensing Utility flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a Cisco Smart Licensing Utility vulnerability, tracked as CVE-2024-20439, to its Known Exploited Vulnerabilities (KEV) catalog. Last week, Cisco disclosed two vulnerabilities in its Smart Licensing Utility: CVE-2024-20439, […]

March 31, 2025
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Russia-linked Gamaredon targets Ukraine with Remcos RAT

Russia-linked Gamaredon targets Ukraine with a phishing campaign using troop-related lures to deploy the Remcos RAT via PowerShell downloader. Talos researchers warn that Russia-linked APT group Gamaredon (a.k.a. Armageddon, Primitive Bear, ACTINIUM, Callisto) targets Ukraine with a phishing campaign. The cyberespionage group is behind a long series of spear-phishing attacks targeting Ukrainian entities, and organizations related […]

March 31, 2025
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CoffeeLoader uses a GPU-based packer to evade detection

CoffeeLoader is a sophisticated malware that uses numerous techniques to bypass security solutions, Zscaler ThreatLabz warns. Zscaler ThreatLabz discovered CoffeeLoader, a malware family active since September 2024, that uses multiple techniques to evade endpoint security while downloading second-stage payloads. The advanced techniques used by the malware include GPU-based packing, call stack spoofing, sleep obfuscation, and […]

March 31, 2025
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Morphing Meerkat phishing kits exploit DNS MX records

Morphing Meerkat phishing kits exploit DNS MX records to deliver spoofed login pages, targeting over 100 brands. Infoblox researchers discovered a new phishing-as-a-service (PhaaS) platform that generated multiple phishing kits, called Morphing Meerkat, using DNS mail exchange (MX) records to deliver fake login pages and targeting over 100 brands. Threat actors are exploiting DNS techniques […]

March 31, 2025
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CISA warns of RESURGE malware exploiting Ivanti flaw

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warns of RESURGE malware, targeting a vulnerability in Ivanti Connect Secure (ICS) appliances. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) published a Malware Analysis Report (MAR) on a new malware called RESURGE. The malicious code has been used in attacks targeting the flaw CVE-2025-0282 in Ivanti Connect […]

March 31, 2025
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SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 39

Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Microsoft Trusted Signing service abused to code-sign malware Shedding light on the ABYSSWORKER driver  VSCode Marketplace Removes Two Extensions Deploying Early-Stage Ransomware New Android Malware Campaigns Evading Detection Using Cross-Platform Framework .NET MAUI   Raspberry Robin: Copy […]

March 30, 2025
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Sam’s Club Investigates Alleged Cl0p Ransomware Breach

The Walmart-owned membership warehouse club chain Sam’s Club is investigating claims of a Cl0p ransomware security breach. Sam’s Club is a membership warehouse club chain in the United States, owned by Walmart. Founded in 1983 by Sam Walton, Walmart’s founder, as Sam’s Wholesale Club, it was renamed Sam’s Club in 1990. These stores operate on a bulk […]

March 30, 2025
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FBI and DOJ seize $8.2 Million in romance baiting crypto fraud scheme

The U.S. DOJ seized over $8.2 million in USDT stolen through ‘romance baiting’ scams, where victims are tricked into fake investments promising high returns. On February 27, 2025, the U.S. Attorney’s Office in Ohio filed a civil forfeiture complaint for $8.2M in USDT (Tether) linked to a ‘romance baiting’ scam. Fraudsters used anonymous messaging apps […]

March 29, 2025
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