Handler on Duty: Didier Stevens
Threat Level: green
Podcast Detail
SANS Stormcast Thursday, May 1st: Sonicwall Attacks; Cached Windows RDP Credentials
If you are not able to play the podcast using the player below: Use this direct link to the audio file: https://traffic.libsyn.com/securitypodcast/9432.mp3
My Next Class
Application Security: Securing Web Apps, APIs, and Microservices | San Diego | May 5th - May 10th 2025 |
Application Security: Securing Web Apps, APIs, and Microservices | Washington | Jul 14th - Jul 19th 2025 |
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
Application Security: Securing Web Apps, APIs, and Microservices | San Diego | May 5th - May 10th 2025 |
Application Security: Securing Web Apps, APIs, and Microservices | Washington | Jul 14th - Jul 19th 2025 |
Application Security: Securing Web Apps, APIs, and Microservices | Las Vegas | Sep 22nd - Sep 27th 2025 |
Application Security: Securing Web Apps, APIs, and Microservices | Denver | Oct 4th - Oct 9th 2025 |