SANS Internet Stormcenter Daily Cyber Security Podcast (Stormcast)

• SANS Stormcast Friday, May 30th 2025: Alternate Data Streams; Connectwise Breach; Google Calendar C2;

  Alternate Data Streams: Adversary Defense Evasion and Detection Good Primer of alternate data streams and how they are abused, as well as how to detect and defend against ADS abuse. https://isc.sans.edu/diary/Alternate%20Data%20Streams%20%3F%20Adversary%20Defense%20Evasion%20and%20Detection%20%5BGuest%20Diary%5D/31990 Connectwise Breach Affects ScreenConnect Customers Connectwise s ScreenConnect solution was compromised, leading to attacks against a small number of customers. This is yet another example of how attackers are taking advantage of remote access solutions. https://www.connectwise.com/company/trust/advisories Mark Your Calendar: APT41 Innovative Tactics Google detected attacks leveraging Google s calendar solution as a command and control channel. https://cloud.google.com/blog/topics/threat-intelligence/apt41-innovative-tactics Webs of Deception: Using the SANS ICS Kill Chain to Flip the Advantage to the Defender Defending a small Industrial Control System (ICS) against sophisticated threats can seem futile. The resource disparity between small ICS defenders and sophisticated attackers poses a significant security challenge. https://www.sans.edu/cyber-research/webs-deception-using-sans-ics-kill-chain-flip-advantage-defender/

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• SANS Stormcast Thursday May 29th 2025: LLM Assisted Analysis; MSP Ransomware; Everetz Vulnerability

  Exploring a Use Case of Artificial Intelligence Assistance with Understanding an Attack Jennifer Wilson took a weird string found in a recent honeypot sample and worked with ChatGPT to figure out what it is all about. https://isc.sans.edu/diary/%5BGuest%20Diary%5D%20Exploring%20a%20Use%20Case%20of%20Artificial%20Intelligence%20Assistance%20with%20Understanding%20an%20Attack/31980 Ransomware Deployed via SimpleHelp Vulnerabilities Ransomware actors are using vulnerabilities in SimpleHelp to gain access to victim s networks via MSPs. The exploited vulnerabilities were patched in January. https://news.sophos.com/en-us/2025/05/27/dragonforce-actors-target-simplehelp-vulnerabilities-to-attack-msp-customers/ OS Command Injection in Everetz Equipment Broadcast equipment manufactured by Everetz is susceptible to an OS command injection vulnerability. Everetz has not responded to researchers reporting the vulnerability so far and there is no patch available. https://www.onekey.com/resource/security-advisory-remote-code-execution-on-evertz-svdn-cve-2025-4009

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• SANS Stormcast Wednesday May 28th 2025: Securing authorized_keys; ADAuditPlus SQL Injection; Dero Miner vs Docker API

  SSH authorized_keys File One of the most common techniques used by many bots is to add rogue keys to the authorized_keys file, implementing an SSH backdoor. Managing these files and detecting unauthorized changes is not hard and should be done if you operate Unix systems. https://isc.sans.edu/diary/Securing%20Your%20SSH%20authorized_keys%20File/31986 REMOTE COMMAND EXECUTION ON SMARTBEDDED METEOBRIDGE (CVE-2025-4008) Weatherstation software Meteobridge suffers from an easily exploitable unauthenticated remote code execution vulnerability https://www.onekey.com/resource/security-advisory-remote-command-execution-on-smartbedded-meteobridge-cve-2025-4008 https://forum.meteohub.de/viewtopic.php?t=18687 Manageengine ADAuditPlus SQL Injection Zoho patched two SQL Injection vulnerabilities in its ManageEngine ADAuditPlus product https://www.manageengine.com/products/active-directory-audit/cve-2025-41407.html https://www.manageengine.com/products/active-directory-audit/cve-2025-36527.html Dero Miner Infects Containers through Docker API Kaspersky found yet another botnet infecting docker containers to spread crypto coin miners. The initial access happens via exposed docker APIs. https://securelist.com/dero-miner-infects-containers-through-docker-api/116546/

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• SANS Stormcast Tuesday, May 27th 2025: SVG Steganography; Fortinet PoC; GitLab Duo Prompt Injection

  SVG Steganography Steganography is not only limited to pixel-based images but can be used to embed messages into vector-based formats like SVG. https://isc.sans.edu/diary/SVG%20Steganography/31978 Fortinet Vulnerability Details CVE-2025-32756 Horizon3.ai shows how it was able to find the vulnerability in Fortinet s products, and how to possibly exploit this issue. The vulnerability is already being exploited in the wild and was patched May 13th https://horizon3.ai/attack-research/attack-blogs/cve-2025-32756-low-rise-jeans-are-back-and-so-are-buffer-overflows/ Remote Prompt Injection in GitLab Duo Leads to Source Code Theft An attacker may leave instructions (prompts) for GitLab Duo embedded in the source code. This could be used to exfiltrate source code and secrets or to inject malicious code into an application. https://www.legitsecurity.com/blog/remote-prompt-injection-in-gitlab-duo

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• SANS Stormcast Friday, May 23rd 2025: Backup Connectivity; Windows 2025 dMSA Abuse; Samlify Vulnerability

  Resilient Secure Backup Connectivity for SMB/Home Users Establishing resilient access to a home network via a second ISP may lead to unintended backdoors. Secure the access and make sure you have the visibility needed to detect abuse. https://isc.sans.edu/diary/Resilient%20Secure%20Backup%20Connectivity%20for%20SMB%20Home%20Users/31972 BadSuccessor: Abusing dMSA to Escalate Privileges in Active Directory An attacker with the ability to create service accounts may be able to manipulate these accounts to mark them as migrated accounts, inheriting all privileges the original account had access to. https://www.akamai.com/blog/security-research/abusing-dmsa-for-privilege-escalation-in-active-directory Flaw in samlify That Opens Door to SAML Single Sign-On Bypass CVE-2025-47949 The samlify Node.js library does not verify SAML assertions correctly. It will consider the entire assertion valid, not just the original one. An attacker may use this to obtain additional privileges or authenticate as a different user https://www.endorlabs.com/learn/cve-2025-47949-reveals-flaw-in-samlify-that-opens-door-to-saml-single-sign-on-bypass

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