#backdoor

At Microsoft, securing the ecosystem means more than just fixing bugs—it means proactively hunting for variant classes, identifying systemic weaknesses, and working across teams to protect customers before attackers ever get the chance. This blog highlights one such effort: a deep dive into the risks of misconfigured postMessage handlers across Microsoft services and how MSRC worked with engineering teams to mitigate them.

Cybersecurity researchers have shed light on a novel attack chain that employs phishing emails to deliver an open-source backdoor called VShell. The "Linux-specific malware infection chain that starts with a spam email with a malicious RAR archive file," Trellix researcher Sagar Bade said in a technical write-up. "The payload isn't hidden inside the file content or a macro, it's encoded directly

Threat actors have been observed leveraging the deceptive social engineering tactic known as ClickFix to deploy a versatile backdoor codenamed CORNFLAKE.V3. Google-owned Mandiant described the activity, which it tracks as UNC5518, as part of an access-as-a-service scheme that employs fake CAPTCHA pages as lures to trick users into providing initial access to their systems, which is then

Doctor Web warns of Android.Backdoor.916.origin, a fake antivirus app that spies on Russian users by stealing data, streaming…

Attackers are wielding the sophisticated modular malware while exploiting CVE-2025-29824, a previously zero-day flaw in Windows Common Log File System (CLFS) that allows attackers to gain system-level privileges on compromised systems.

The U.K. government has apparently abandoned its plans to force Apple to weaken encryption protections and include a backdoor that would have enabled access to the protected data of U.S. citizens. U.S. Director of National Intelligence (DNI) Tulsi Gabbard, in a statement posted on X, said the U.S. government had been working with its partners with the U.K. over the past few months to ensure that

Microsoft warns that a fake ChatGPT desktop app was used to deliver PipeMagic malware, linked to ransomware attacks…

Power doesn’t just disappear in one big breach. It slips away in the small stuff—a patch that’s missed, a setting that’s wrong, a system no one is watching. Security usually doesn’t fail all at once; it breaks slowly, then suddenly. Staying safe isn’t about knowing everything—it’s about acting fast and clear before problems pile up. Clarity keeps control. Hesitation creates risk. Here are this

Cisco Talos discovered UAT-7237, a Chinese-speaking advanced persistent threat (APT) group active since at least 2022, which has significant overlaps with UAT-5918.

Hazel braves Vegas, overpriced water and the Black Hat maze to bring you Talos’ latest research — including a deep dive into the PS1Bot malware campaign.