Microsoft Patch Tuesday https://isc.sans.edu/diary/Microsoft%20August%202025%20Patch%20Tuesday/32192 https://cymulate.com/blog/zero-click-one-ntlm-microsoft-security-patch-bypass-cve-2025-50154/ libarchive Vulnerability A libarchive vulnerability patched in June was upgraded from a low CVSS score to a critical one. Libarchive is used by compression software across various operating systems, making this a difficult vulnerability to patch https://www.freebsd.org/security/advisories/FreeBSD-SA-25:07.libarchive.asc Adobe Patches Adobe released patches for 13 different Read More

Erlang OTP SSH Exploits A recently patched and easily exploited vulnerability in Erlang/OTP SSH is being exploited. Palo Alto collected some of the details about this exploit activity that they observed. https://unit42.paloaltonetworks.com/erlang-otp-cve-2025-32433/ WinRAR Exploited WinRAR vulnerabilities are actively being exploited by a number of threat actors. The vulnerability allows for Read More

Google Paid Ads for Fake Tesla Websites Someone is setting up fake Tesla lookalike websites that attempt to collect credit card data from unsuspecting users trying to preorder Tesla products. https://isc.sans.edu/diary/Google%20Paid%20Ads%20for%20Fake%20Tesla%20Websites/32186 Compromising USB Devices for Persistent Stealthy Access USB devices, like Linux-based web cams, can be compromised to emulate malicious Read More

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 Read More

Do Sextortion Scams Still Work in 2025? Jan looked at recent sextortion emails to check if any of the crypto addresses in these emails received deposits. Sadly, some did, so these scams still work. https://isc.sans.edu/diary/Do%20sextortion%20scams%20still%20work%20in%202025%3F/32178 Akira Ransomware Group s use of Drivers Guidepoint Security observed the Akira ransomware group using Read More

Stealing Machinekeys for fun and profit (or riding the SharePoint wave) Bojan explains in detail how .NET uses Machine Keys to protect the VIEWSTATE, and how to abuse the VIEWSTATE for code execution if the Machine Keys are lost. https://isc.sans.edu/diary/Stealing%20Machine%20Keys%20for%20fun%20and%20profit%20%28or%20riding%20the%20SharePoint%20wave%29/32174 Perplexity is using stealth, undeclared crawlers to evade website no-crawl Read More

Daily Trends Report A new trends report will bring you daily data highlights via e-mail. https://isc.sans.edu/diary/New%20Feature%3A%20Daily%20Trends%20Report/32170 NVidia Triton RCE Wiz found an interesting information leakage vulnerability in NVidia s Triton servers that can be leveraged to remote code execution. https://www.wiz.io/blog/nvidia-triton-cve-2025-23319-vuln-chain-to-ai-server Cursor AI MCP Vulnerability An attacker could abuse negligent Cursor Read More

Scans for pop3user with guessable password A particular IP assigned to a network that calls itself Unmanaged has been scanning telnet/ssh for a user called pop3user with passwords pop3user or 123456 . I assume they are looking for legacy systems that either currently run pop3 or ran pop3 in the Read More

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 Read More

Securing Firebase: Lessons Re-Learned from the Tea Breach Inspried by the breach of the Tea app, Brendon Evans recorded a video to inform of Firebase security issues https://isc.sans.edu/diary/Securing%20Firebase%3A%20Lessons%20Re-Learned%20from%20the%20Tea%20Breach/32158 WebKit Vulnerability Exploited before Apple Patch A WebKit vulnerablity patched by Apple yesterday has already been exploited in Google Chrome. Google noted Read More

Apple Updates Everything: July 2025 Edition Apple released updates for all of its operating systems patching 89 different vulnerabilities. Many vulnerabilities apply to multiple operating systems. https://isc.sans.edu/diary/Apple%20Updates%20Everything%3A%20July%202025/32154 Python Triage A quick python script by Xavier to efficiently search through files, even compressed once, for indicators of compromise. https://isc.sans.edu/diary/Triage+is+Key+Python+to+the+Rescue/32152/ PaperCut Attacks Read More

Parasitic SharePoint Exploits We are seeing attacks against SharePoint itself and attempts to exploit backdoors left behind by attackers. https://isc.sans.edu/diary/Parasitic%20Sharepoint%20Exploits/32148 Cisco ISE Vulnerability Exploited A recently patched vulnerability in Cisco ISE is now being exploited. The Zero Day Initiative has released a blog detailing the exploit chain to obtain code Read More

Linux Namespaces Linux namespaces can be used to control networking features on a process-by-process basis. This is useful when trying to present a different network environment to a process being analysed. https://isc.sans.edu/diary/Sinkholing%20Suspicious%20Scripts%20or%20Executables%20on%20Linux/32144 Coyote in the Wild: First-Ever Malware That Abuses UI Automation Akamai identified malware that takes advantage of Microsoft Read More

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 Read More

Reversing SharePoint Toolshell Exploits CVE-2025-53770 and CVE-2025-53771 A quick walk-through showing how to decode the payload of recent SharePoint exploits https://isc.sans.edu/diary/Analyzing%20Sharepoint%20Exploits%20%28CVE-2025-53770%2C%20CVE-2025-53771%29/32138 Compromised JavaScript NPM is Package The popular npm package is was compromised by malware. Luckily, the malicious code was found quickly, and it was reversed after about five hours. Read More

Microsoft Updates SharePoint Vulnerability Guidance CVE-2025-53770 and CVE-2025-53771 Microsoft released its update for SharePoint 2016, completing the updates across all currently supported versions. https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/ WinZip MotW Privacy Starting with version 7.10, WinZip introduced an option to no longer include the download URL in zip files as part of the Mark Read More

Microsoft Released Patches for SharePoint Vulnerability CVE-2025-53770 CVE-2025-53771 Microsoft released a patch for the currently exploited SharePoint vulnerability. It also added a second CVE number identifying the authentication bypass vulnerability. https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/ How Quickly Are Systems Patched? Jan took Shodan data to check how quickly recent vulnerabilities were patched. The quick Read More

SharePoint Servers Exploited via 0-day CVE-2025-53770 Late last week, CodeWhite found a new remote code execution exploit against SharePoint. This vulnerability is now actively exploited. https://isc.sans.edu/diary/Critical+Sharepoint+0Day+Vulnerablity+Exploited+CVE202553770+ToolShell/32122/ Veeam Voicemail Phishing Attackers appear to impersonate VEEAM in recent voicemail-themed phishing attempts. https://isc.sans.edu/diary/Veeam%20Phishing%20via%20Wav%20File/32120 Passkey Phishing Attack A currently active phishing attack takes advantage Read More

Hiding Payloads in Linux Extended File Attributes Xavier today looked at ways to hide payloads on Linux, similar to how alternate data streams are used on Windows. Turns out that extended file attributes do the trick, and he presents some scripts to either hide data or find hidden data. https://isc.sans.edu/diary/Hiding%20Payloads%20in%20Linux%20Extended%20File%20Attributes/32116 Read More

More Free File Sharing Services Abuse The free file-sharing service catbox.moe is abused by malware. While it officially claims not to allow hosting of executables, it only checks extensions and is easily abused https://isc.sans.edu/diary/More%20Free%20File%20Sharing%20Services%20Abuse/32112 Ongoing SonicWall Secure Mobile Access (SMA) Exploitation Campaign using the OVERSTEP Backdoor A group Google identifies Read More