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Head Mare APT is exploiting vulnerabilities in an unpatched TrueConf server to deliver PhantomCore and PhantomGraph to video conference participants

Overview of the attack In July 2026, Kaspersky experts detected a new attack by the Head Mare group. Previously, we classified them as hacktivists, but now we define them as an APT group due to the sophistication of their TTPs and the absence of destructive activity (encryption, wiping) in the targeted infrastructures. In this latest campaign, the attackers exploited a chain of vulnerabilities in the TrueConf video conferencing server and replaced the original TrueConf client installers with…

TrueConf Kaspersky Microsoft energetika výroba a průmysl doprava telekomunikace RU

Securelist (Kaspersky) ·

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DeadLock ransomware: Breaking down a Rust-based encryptor with decentralized recovery infrastructure

In this article Pre-encryptionEncryptionPost-encryptionDefending against DeadLock ransomwareIndicators of compromise Microsoft Threat Intelligence tracks DeadLock ransomware as an emerging financially motivated operation distinguished by its use of decentralized infrastructure to support victim communications and data leak operations. Its recovery ecosystem combines the Session messaging network with blockchain-backed services that store and deliver resources used throughout the extortion…

Microsoft doprava výroba a průmysl energetika US

Microsoft Security Blog ·

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CaptiveCrunch: Midnight Blizzard targets travelers worldwide for malware delivery and credential theft

In this article The CaptiveCrunch campaignStorm-2945 and Midnight BlizzardCaptiveCrunch tradecraft and toolingHow to protect against CaptiveCrunch activityMicrosoft Defender detections and hunting guidanceIndicators of compromise Since early May 2026, Microsoft Threat Intelligence has observed Storm-2945, a sub-cluster of Midnight Blizzard, conducting widespread but targeted traffic manipulation attacks involving hospitality sector networks served by captive portals worldwide. Despite some…

Microsoft telekomunikace obchod doprava US

Microsoft Security Blog ·

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27th July – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 27th July, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Nichirei, a Japan-based frozen-food supplier and logistics company, has experienced a ransomware attack that disrupted shipping operations and affected approximately 5,000 customers. KFC Japan warned of possible shortages. Nichirei confirmed personal data theft, while the RansomHouse group claimed responsibility and published a subset of the stolen…

KEV ✓ EPSS 0.77 CVE-2025-66376 CVE-2026-16232 CVE-2026-50522 Check Point Oracle Microsoft OpenAI energetika vodárenství veřejná správa doprava IL

Check Point Research ·