A brief daily summary of what is important in information security. The podcast is published every weekday and designed to get you ready for the day with a brief, usually 5 minute long, summary of current network security related events. The content is late breaking, educational and based on listener input as well as on input received by the SANS Internet Stormcenter. You may submit questions and comments via our contact form at https://isc.sans.edu/contact.html .
SANS Stormcast Thursday, May 1st: Sonicwall Attacks; Cached Windows RDP Credentials
April 30, 2025
6:28
1.21 MB ( 4.23 MB less)
Downloads: 0
Web Scanning for Sonicwall Vulnerabilities CVE-2021-20016
For the last week, scans for Sonicwall API login and domain endpoints have skyrocketed. These attacks may be exploiting an older vulnerability or just attempting to brute force credentials.
https://isc.sans.edu/diary/Web%20Scanning%20Sonicwall%20for%20CVE-2021-20016/31906
The Wizards APT Group SLAAC Spoofing Adversary in the Middle Attacks
ESET published an article with details regarding an IPv6-linked attack they have observed. Attackers use router advertisements to inject fake recursive DNS servers that are used to inject IP addresses for hostnames used to update software. This leads to the victim downloading malware instead of legitimate updates.
https://www.welivesecurity.com/en/eset-research/thewizards-apt-group-slaac-spoofing-adversary-in-the-middle-attacks/
Windows RDP Access is Possible with Old Credentials
Credential caching may lead to Windows allowing RDP logins with old credentials.
https://arstechnica.com/security/2025/04/windows-rdp-lets-you-log-in-using-revoked-passwords-microsoft-is-ok-with-that/?comments-page=1#comments