MalwareTips Newswire

Security updates, independent AV tests and useful news for the MalwareTips community.
Microsoft Security ·

Impersonating IT support: how threat actors turn a remote session into enterprise-wide access

Microsoft Threat Intelligence observed a human-operated intrusion campaign that abuses Microsoft Teams external collaboration to impersonate IT support, gain remote access, and deploy a Node.js-based implant. Learn how attackers move from social engineering to lateral movement using legitimate tools, and how Microsoft Defender helps detect and disrupt the activity. The post Impersonating IT support: how threat actors turn a remote session into enterprise-wide access appeared first on Microsoft Security Blog.
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The Hacker News ·

Fake Software Installers Disable Windows Update and Weaken Microsoft Defender

An active malware campaign is using bogus software-download websites to impersonate trusted vendors and distribute malicious installers. "The campaign has targeted users looking to download popular software and has resulted in compromises across multiple organizations and industries, primarily affecting China-based operations of multinational organizations and Chinese-speaking users," Microsoft
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The Hacker News ·

Malicious .git Configs Can Make Claude, Codex, Cursor, and Other AI Agents Run Attacker Code

Manifold Security has disclosed eight security flaws across seven command-line AI coding agents in which a repository's own Git configuration names a command that the agent runs on the developer's machine, four of them still unpatched at publication. The command executes as the user, outside the agent's sandbox and without an approval prompt, and exploitation requires the repository to arrive
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The Hacker News ·

Meta Ads Push StreamRat Android Trojan That Can Gain Near-Complete Device Control

Cybersecurity researchers have disclosed details of a new Android banking trojan called StreamRat that was promoted to Spanish-speaking users through a fake television-streaming campaign on Meta and can give operators near-complete control of infected devices. ThreatFabric said the campaign's advertisement focused on Spain and reached an estimated 570,950 Meta accounts in the European Union
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Check Point Research ·

Gaming the system: how a Chinese-speaking actor turned Brazilian government sites into an SEO weapon

Research by: Amit Yardeni Key Points Introduction Since mid-2025, Check Point Research has tracked a sustained campaign against Brazilian organizations. The tradecraft points to a Chinese-speaking cybercrime group connected to Earth Berberoka, an actor first documented targeting gambling sites across Asia. Once inside a victim, the group deploys a broad Linux toolkit: a custom downloader, several backdoors, […] The post Gaming the system: how a Chinese-speaking actor turned Brazilian government sites into an SEO weapon appeared first on Check Point Research.
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Microsoft Security ·

Counterfeit installers to system compromise: Tracking a deceptive software download campaign

An active campaign is impersonating legitimate software vendors to deliver malware through look-alike download pages and regenerated installer archives. Microsoft Defender Experts shares observed attack techniques, Defender XDR detections, indicators of compromise, and practical mitigations to help organizations identify, block, and respond to this threat. The post Counterfeit installers to system compromise: Tracking a deceptive software download campaign appeared first on Microsoft Security Blog.
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Check Point Research ·

Breaking the Seal: Static Deobfuscation of JSCeal’s Compiled V8 Bytecode

Research by: hasherezade Key Points Introduction JSCeal is a stealer delivered as compiled V8 bytecode (.jsc) and executed by a bundled Node.js runtime, targeting cryptocurrency applications (other vendors also tag it with the names WEEVILPROXY or MeadowLocust). Its campaign activity dates back to March 2024 [1]; Check Point Research has been tracking the malware since early […] The post Breaking the Seal: Static Deobfuscation of JSCeal’s Compiled V8 Bytecode appeared first on Check Point Research.
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Check Point Research ·

BTR Reforged: Weaponizing Defender’s Remediation Driver as a Kernel Operation Primitive

Research by: Jiří Vinopal (@vinopaljiri) Abstract What if a trusted security component could be repurposed into an attacker-controlled kernel primitive? What if a signed Microsoft remediation driver could be instructed to execute arbitrary file and registry operations from Ring 0 – without exploits, vulnerabilities, or memory corruption? In this publication, we present the first full […] The post BTR Reforged: Weaponizing Defender’s Remediation Driver as a Kernel Operation Primitive appeared first on Check Point Research.
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