StegoAd: How 119 Fake Browser Extensions Stole Credentials and Ran Ad Fraud for Two Years

Microsoft shut down the StegoAd campaign, which used 119 malicious Edge extensions, hit 2.6M installs, and ran undetected for two years. Microsoft just shut down one of the more technically clever malicious extension campaigns it’s ever documented. The operation, named StegoAd, ran 119 extensions on the Edge Add-ons store, racked up roughly 2.6 million installs, […]

June 29, 2026
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SSU and FBI Uncover Russian Cyber Espionage Operation Against Officials and Military Personnel

Ukraine’s SSU and the FBI Just Confirmed Russian Intelligence Has Been Systematically Hacking Messenger Accounts for Years. The Security Service of Ukraine (SSU), working jointly with the FBI, has formally exposed a sustained Russian intelligence campaign targeting the messaging accounts of government officials, military personnel, politicians, and activists across Ukraine, Europe, and the United States. […]

June 29, 2026
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KDDI Data Breach Impacts up to 14.2 Million Email Accounts at Six ISPs

KDDI Corporation disclosed a breach affecting up to 14.2 million email accounts after attackers exploited a vulnerability in third-party software. KDDI Corporation disclosed a data breach that exposed up to 14.2 million email accounts across six Japanese internet service providers. KDDI Corporation is one of Japan’s largest telecommunications companies. It employs more than 60,000 people […]

June 28, 2026
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SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 103

Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Malware Newsletter More Than 4,000 Legacy Routers Compromised by AryStinger, Turned into Global Attack Proxies for Hackers   A VBScript campaign distributed through WhatsApp deploying RMM software  Lost in relocation: analysis of a new loader distributing CASTLESTEALER   […]

June 28, 2026
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Chinese APT CL-STA-1062 Expands Attacks on Southeast Asian Critical Infrastructure With Custom Malware

Chinese-speaking APT CL-STA-1062 targeted Southeast Asian government and energy networks open-source tools, and a new TinyRCT backdoor. Palo Alto Networks Unit 42 researchers published a detailed report on a Chinese-speaking threat actor, tracked as CL-STA-1062, that has been running persistent operations across East Asia since at least March 2022 and shifted focus to Southeast Asian […]

June 26, 2026
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Activist Phone Hacked With Cellebrite After Russia Contract Cancellation

Russian authorities used Cellebrite tools to unlock an activist’s iPhone and analyze private data despite canceled support, raising abuse concerns. On May 31, 2021, Russian security services pulled opposition activist Andrey Pivovarov off a flight at St. Petersburg airport and confiscated his iPhone 12 and MacBook. He never consented to a search and never gave […]

June 26, 2026
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U.S. CISA adds Cisco and PTC Windchill and FlexPLM flaws to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Cisco and PTC Windchill and FlexPLM flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Cisco and PTC Windchill and FlexPLM flaws to its Known Exploited Vulnerabilities (KEV) catalog. The two flaws added to the catalog are: CVE-2026-12569 is a critical remote […]

June 26, 2026
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Third-Party Breach at Polymarket Leads to $2.94M Crypto Theft

Polymarket confirmed hackers stole funds from some users after attackers injected malicious code through a compromised third-party vendor. Polymarket confirmed that a security breach at a third-party vendor allowed attackers to inject malicious code into its website, leading to the theft of funds from an undisclosed number of users. The company said it has contained […]

June 26, 2026
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