Tag: friday

Increasing Searches for ZIP Files Attackers are scanning our honeypots more and more for .zip files. They are looking for backups of credential files and the like left behind by careless administrators and developers. https://isc.sans.edu/diary/Increasing%20Searches%20for%20ZIP%20Files/32242 FreePBX Vulnerability An upatched vulnerability in FreePBX is currently being exploited. FreePBX offers mitigation advice and has also just released […]

Don’t Forget The „-n“ Command Line Switch Disabling reverse DNS lookups for IP addresses is important not just for performance, but also for opsec. Xavier is explaining some of the risks. https://isc.sans.edu/diary/Don%27t%20Forget%20The%20%22-n%22%20Command%20Line%20Switch/32220 watchTowr releases details about recent Commvault flaws Users of the Commvault enterprise backup solution must patch now after watchTowr released details about recent […]

AI and Faster Attack Analysis A few use cases for LLMs to speed up analysis https://isc.sans.edu/diary/AI%20and%20Faster%20Attack%20Analysis%20%5BGuest%20Diary%5D/32198 Proxyware Malware Being Distributed on YouTube Video Download Site Popular YouTube download sites will attempt to infect users with proxyware. https://asec.ahnlab.com/en/89574/ Xerox Freeflow Core Vulnerability Horizon3.ai discovered XXE Injection (CVE-2025-8355) and Path Traversal (CVE-2025-8356) vulnerabilities in Xerox FreeFlow Core, […]

Mass Internet Scanning from ASN 43350 Our undergraduate intern Duncan Woosley wrote up aggressive scans from ASN 43350 https://isc.sans.edu/diary/Mass+Internet+Scanning+from+ASN+43350+Guest+Diary/32180/#comments HTTP/1.1 Desync Attacks Portswigger released details about new types of HTTP/1.1 desync attacks it uncovered. These attacks are particularly critical for organizations using middleboxes to translate from HTTP/2 to HTTP/1.1 https://portswigger.net/research/http1-must-die Microsoft Warns of Exchange Server […]

Scattered Spider Related Domain Names A quick demo of our domain feeds and how they can be used to find Scattered Spider related domains https://isc.sans.edu/diary/Scattered+Spider+Related+Domain+Names/32162 Excel External Workbook Links to Blocked File Types Will Be Disabled by Default Excel will discontinue allowing links to dangerous file types starting as early as October. https://support.microsoft.com/en-us/topic/external-workbook-links-to-blocked-file-types-will-be-disabled-by-default-6dd12903-0592-463d-9e68-0741cf62ee58 CISA Releases […]

New File Integrity Tool: ficheck.py Jim created a new tool, ficheck.py, that can be used to verify file integrity. It is a drop-in replacement for an older tool, fcheck, which was written in Perl and no longer functions well on modern Linux distributions. https://isc.sans.edu/diary/New%20Tool%3A%20ficheck.py/32136 Mitel Vulnerability Mitel released a patch for a vulnerability in its […]

SSH Tunneling in Action: direct-tcp requests Attackers are compromising ssh servers to abuse them as relays. The attacker will configure port forwarding direct-tcp connections to forward traffic to a victim. In this particular case, the Yandex mail server was the primary victim of these attacks. https://isc.sans.edu/diary/SSH%20Tunneling%20in%20Action%3A%20direct-tcp%20requests%20%5BGuest%20Diary%5D/32094 Fortiguard FortiWeb Unauthenticated SQL injection in GUI (CVE-2025-25257) An […]

Open-VSX Flaw Puts Developers at Risk A flaw in the open-vsx extension marketplace could have let to the compromise of any extension offered by the marketplace. https://blog.koi.security/marketplace-takeover-how-we-couldve-taken-over-every-developer-using-a-vscode-fork-f0f8cf104d44 Bluetooth Vulnerability Could Allow Eavesdropping A vulnerability in the widely used Airoha Bluetooth chipset can be used to compromise devices and use them for eavesdropping. https://insinuator.net/2025/06/airoha-bluetooth-security-vulnerabilities/ Critical Cisco […]

How Long Until the Phishing Starts? About Two Weeks After setting up a Google Workspace and adding a new user, it took only two weeks for the new employee to receive somewhat targeted phishing emails. https://isc.sans.edu/diary/How%20Long%20Until%20the%20Phishing%20Starts%3F%20About%20Two%20Weeks/32052 Scammers hijack websites of Bank of America, Netflix, Microsoft, and more to insert fake phone numbers Scammers are placing […]

Be Careful With Fake Zoom Client Downloads Miscreants are tricking victims into downloading fake Zoom clients (and likely other meeting software) by first sending them fake meeting invites that direct victims to a page that offers malware for download as an update to the Zoom client. https://isc.sans.edu/diary/Be%20Careful%20With%20Fake%20Zoom%20Client%20Downloads/32014 Python tarfile Vulnerability Recently, the Python tarfile module […]