Microsoft Warns of Tax-Themed Email Attacks Using PDFs and QR Codes to Deliver Malware

These campaigns notably use redirection methods such as URL shorteners and QR codes contained in malicious attachments and abuse legitimate services like file-hosting services and business profile pages to avoid detection.

CISA, FBI, nations warn of fast flux DNS threat

CISA, on Thursday urged organizations, internet service providers, and security firms to strengthen defenses against so-called fast flux attacks. Malicious cyber actors use fast flux to obfuscate the locations of malicious servers.

Over 500 Phishing Domains Emerge Following Bybit Heist

A large number of phishing campaigns emerged in the aftermath of the Bybit heist, designed to siphon cryptocurrency from its customers. There were instances of popular crypto keywords, and the use of free hosting and subdomain registration services.

Hackers Exploit Cloudflare for Advanced Phishing Attacks

A sophisticated phishing campaign orchestrated by a Russian-speaking threat actor has been uncovered, revealing the abuse of Cloudflare services and Telegram for malicious purposes.

FBI Issues Warning Over Free Online File Converters That Actually Install Malware

Instead of converting files, the tools actually load malware onto victims’ computers. The FBI warned specifically that the malware infection can also lead to ransomware attacks.

Denmark Warns of Increased State-Sponsored Campaigns Targeting European Telcos

A new threat assessment by the Danish Social Security Agency warns that nation-state hackers have an extensive technical understanding of the telecommunications sector’s infrastructure and protocols in cyberattacks against the industry abroad.

FBI, CISA, and MS-ISAC Warn Organizations About Medusa Ransomware Attacks

As of February 2025, Medusa developers and affiliates have impacted over 300 victims from a variety of critical infrastructure sectors with affected industries including medical, education, legal, insurance, technology, and manufacturing.

US seizes $23 million in crypto linked to LastPass breaches

U.S. authorities have seized over $23 million in cryptocurrency linked to the theft of $150 million from a Ripple crypto wallet in January 2024. Investigators believe hackers who breached LastPass in 2022 were behind the attack.

New Chirp tool uses audio tones to transfer data between devices

A new open-source tool named 'Chirp' transmits data between computers (and smartphones) through different audio tones. Other microphone-equipped computers running Chirp may capture the sound and translate the message back into text.

US cities warn of wave of unpaid parking phishing texts

US cities are warning of an ongoing mobile phishing campaign pretending to be texts from the city's parking violation departments about unpaid parking invoices, that if unpaid, will incur an additional $35 fine per day.

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