SANS Internet Storm Center's Daily Network Security News Podcast

SANS Stormcast Friday, August 1st, 2025: Scattered Spider Domains; Excel Blocking Dangerous Links; CISA Releasing Thorium Platform 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 D...

SANS Stormcast Thursday July 31st, 2025: Firebase Security; WebKit Vuln Exploited; Scattered Spider Update 
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 Vulnerabilit...

SANS Stormcast Wednesday July 30th, 2025: Apple Updates; Python Triage; Papercut Vuln Exploited 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...

SANS Stormcast Tuesday, July 29th, 2025:Parasitic Exploits; Cisco ISE Exploit; MyASUS Vuln 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....

SANS Stormcast Monday, July 28th, 2025: Linux Namespaces; UI Automation Abuse; Autoswagger 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 Coy...

SANS Stormcast Friday, July 25th, 2025: ficheck.py; Mital and SonicWall Patches 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 Mite...

SANS Stormcast Thursday, July 24th, 2025: Reversing SharePoint Exploit; NPM "is" Compromise; 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" Pack...

SANS Stormcast Wednesday, July 23rd, 2025: Sharepoint 2016 Patch; MotW Privacy and WinZip; Interlock Ransomware; Sophos Patches 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-sharepoin...

SANS Stormcast Tuesday, July 22nd, 2025: SharePoint Emergency Patches; How Long Does Patching Take; HPE Wifi Vuln; Zoho WorkDrive Abused 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://m...

SANS Stormcast Monday July 21st, 2025: Sharepoint Exploited; Veeam Fake Voicemail Phish; Passkey Phishing Attack 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/3...

SANS Stormcast Friday, July 18th, 2025: Extended File Attributes; Critical Cisco ISE Patch; VMWare Patches; Quarterly Oracle Patches 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...

SANS Stormcast Thursday, July 17th, 2025: catbox.moe abuse; Sonicwall Attacks; Rendering Issues 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 Son...

SANS Stormcast Wednesday, July 16th, 2025: ADS Keystroke Logger; Fake Homebrew; Broadcom Altiris RCE; Malicious Cursor AI Extensions Keylogger Data Stored in an ADS Xavier came across a keystroke logger that stores data in alternate data streams. The data includes keystroke logs as well as clipboard data https://isc.sans.edu/diary/Keylogger%20Data%20Stored%20in%20an%20ADS/32108 Malvertising Homebr...

SANS Stormcast Monday, July 14th, 2025: Web Honeypot Log Volume; Browser Extension Malware; RDP Forensics DShield Honeypot Log Volume Increase Within the last few months, there has been a dramatic increase in honeypot log volumes and how often these high volumes are seen. This has not just been from Jesse's residential honeypot, which has historically seen higher log volumes, but from all of the h...

SANS Stormcast Monday, July 14th, 2025: Suspect Domain Feed; Wing FTP Exploited; FortiWeb Exploited; NVIDIA GPU Rowhammer Experimental Suspicious Domain Feed Our new experimental suspicious domain feed uses various criteria to identify domains that may be used for phishing or other malicious purposes. https://isc.sans.edu/diary/Experimental%20Suspicious%20Domain%20Feed/32102 Wing FTP Server RCE Vu...

SANS Stormcast Friday, July 11th, 2025: SSH Tunnel; FortiWeb SQL Injection; Ruckus Unpatched Vuln; Missing Motherboard Patches; 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...

SANS Stormcast Thursday, July 10th, 2025: Internal CA with ACME; TapJacking on Android; Adobe Patches; Setting up Your Own Certificate Authority for Development: Why and How. Some tips on setting up your own internal certificate authority using the smallstep CA. https://isc.sans.edu/diary/Setting%20up%20Your%20Own%20Certificate%20Authority%20for%20Development%3A%20Why%20and%20How./32092 Animation-...

SANS Stormcast Wednesday, July 9th, 2025: Microsoft Patches; Opposum Attack; Microsoft Patch Tuesday, July 2025 Today, Microsoft released patches for 130 Microsoft vulnerabilities and 9 additional vulnerabilities not part of Microsoft's portfolio but distributed by Microsoft. 14 of these are rated critical. Only one of the vulnerabilities was disclosed before being patched, and none of the vulnera...

SANS Stormcast Tuesday, July 8th, 2025: Detecting Filename (Windows); Atomic Stealer now with Backdoor; SEO Scams What's My File Name Malware may use the GetModuleFileName API to detect if it was renamed to a name typical for analysis, like sample.exe or malware.exe https://isc.sans.edu/diary/What%27s%20My%20%28File%29Name%3F/32084 Atomic macOS infostealer adds backdoor for persistent attacks Malw...

SANS Stormcast Monday, July 7th, 2025: interesting usernames; More sudo issues; CitrixBleed2 PoC; Short Lived Certs Interesting ssh/telnet usernames Some interesting usernames observed in our honeypots https://isc.sans.edu/diary/A%20few%20interesting%20and%20notable%20ssh%20telnet%20usernames/32080 More sudo trouble The host option in Sudo can be exploited to execute commands on unauthorized hosts...

SANS Stormcast Thursday July 3rd, 2025: sudo problems; polymorphic zip files; cisco vulnerablity Sudo chroot Elevation of Privilege The sudo chroot option can be leveraged by any local user to elevate privileges to root, even if no sudo rules are defined for that user. https://www.stratascale.com/vulnerability-alert-CVE-2025-32463-sudo-chroot Polymorphic ZIP Files A zip file with a corrupt End of...

SANS Stormcast Monday June 30th, 2025: Scattered Spider; AMI BIOS Exploited; Secure Boot Certs Expiring; Microsoft Resliliency Initiative Scattered Spider Update The threat actor known as Scattered Spider is in the news again, this time focusing on airlines. But the techniques used by Scattered Spider, social engineering, are still some of the most dangerous techniques used by various threat actor...

SANS Stormcast Friday, June 27th, 2025: Open-VSX Flaw; Airoha Bluetooth Vulnerablity; Critical Cisco Identity Service Engine Vuln; 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...

SANS Stormcast Thursday, June 26th, 2025: Another Netscaler Vuln; CentOS Web Panel Vuln; IP Based Certs NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2025-6543 Citrix patched a memory overflow vulnerability leading to unintended control flow and denial of service. https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 Remote code execution in CentOS Web Pa...

SANS Stormcast Tuesday, June 24th, 2025: Telnet/SSH Scan Evolution; Fake Sonicwall Software; File-Fix vs Click-Fix Quick Password Brute Forcing Evolution Statistics After collecting usernames and passwords from our ssh and telnet honeypots for about a decade, I took a look back at how scans changed. Attackers are attempting more passwords in each scans than they used to, but the average length of...