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 .
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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/
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
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/
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
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
SANS Stormcast Thursday, May 22nd 2025: Crypto Confidence Scams; Extension Mayhem for VS Code and Chrome
New Variant of Crypto Confidence Scam Scammers are offering login credentials for what appears to be high value crypto coin accounts. However, the goal is to trick users into paying for expensive VIP memberships to withdraw the money. https://isc.sans.edu/diary/New%20Variant%20of%20Crypto%20Confidence%20Scam/31968 Malicious Chrome Extensions Malicious Chrome extensions mimick popular services like VPNs to trick users into installing them. Once installed, the extensions will exfiltrate browser secrets https://dti.domaintools.com/dual-function-malware-chrome-extensions/ Malicious VS Code Extensions Malicious Visual Studio Code extensions target crypto developers to trick them into installing them to exfiltrate developer secrets. https://securitylabs.datadoghq.com/articles/mut-9332-malicious-solidity-vscode-extensions/#indicators-of-compromise
SANS Stormcast Wednesday, May 21st 2025: Researchers Scanning the Internet; Forgotten DNS Records; openpgp.js Vulneraiblity
Researchers Scanning the Internet A newish RFC, RFC 9511, suggests researchers identify themselves by adding strings to the traffic they send, or by operating web servers on machines from which the scan originates. We do offer lists of researchers and just added three new groups today https://isc.sans.edu/diary/Researchers%20Scanning%20the%20Internet/31964 Cloudy with a change of Hijacking: Forgotten DNS Records Organizations do not always remove unused CNAME records. An attacker may take advantage of this if an attacker is able to take possession of the now unused public cloud resource the name pointed to. https://blogs.infoblox.com/threat-intelligence/cloudy-with-a-chance-of-hijacking-forgotten-dns-records-enable-scam-actor/ Message signature verification can be spoofed CVE-2025-47934 A vulnerability in openpgp.js may be used to spoof message signatures. openpgp.js is a popular library in systems implementing end-to-end encrypted browser applications. https://github.com/openpgpjs/openpgpjs/security/advisories/GHSA-8qff-qr5q-5pr8
SANS Stormcast Tuesday, May 20th 2025: AutoIT Code RAT; Fake Keepass Download; Procolored Printer Software Compromise
RAT Dropped By Two Layers of AutoIT Code Xavier explains how AutoIT was used to install a remote admin tool (RAT) and how to analyse such a tool https://isc.sans.edu/diary/RAT%20Dropped%20By%20Two%20Layers%20of%20AutoIT%20Code/31960 RVTools compromise confirmed Robware.net, the site behind the popular tool RVTools now confirmed that it was compromised. The site is currently offline. https://www.robware.net/readMore Trojaned Version of Keepass used to install info stealer and Cobalt Strike beacon A backdoored version of KeePass was used to trick victims into installing Cobalt Strike and other malware. In this case, Keepass itself was not compromised and the malicious version was advertised via search engine optimization tricks https://labs.withsecure.com/publications/keepass-trojanised-in-advanced-malware-campaign Procolored UV Printer Software Compromised The official software offered by the makers of the Procolored UV printer has been compromised, and versions with malware were distributed for about half a year. https://www.hackster.io/news/the-maker-s-toolbox-procolored-v11-pro-dto-uv-printer-review-680d491e17e3 https://www.gdatasoftware.com/blog/2025/05/38200-printer-infected-software-downloads
SANS Stormcast Monday, May 18th 2025: xorsearch python functions; pwn2own Berlin; senior govt official impersonation; dynamic domain risk
xorsearch.py: Python Functions Didier s xorsearch tool now supports python functions to filter output https://isc.sans.edu/diary/xorsearch.py%3A%20Python%20Functions/31858 Pwn2Own Berlin 2025 Last weeks Pwn2Own contest in Berlin allowed researchers to demonstrate a number of new exploits with a large focus on privilege escalation and virtual machine escape. https://www.zerodayinitiative.com/blog/2025/5/17/pwn2own-berlin-2025-day-three-results Senior US Officials Impersonated in Malicious Messaging Campaign The FBI warns of senior US officials being impersonated in text and voice messages. https://www.ic3.gov/PSA/2025/PSA250515 Scattered Spider: TTP Evolution in 2025 Pushscurity provided an update on how Scattered Spider evolved. One thing they noted was that Scattered Spider takes advantage of legit dynamic domain name systems to make detection more difficult https://pushsecurity.com/blog/scattered-spider-ttp-evolution-in-2025/
SANS Stormcast Friday, May 16th: Increase in Sonicwall Scans; RVTools Compromised?; RountPress
Web Scanning SonicWall for CVE-2021-20016 - Update Scans for SonicWall increased by an order of magnitude over the last couple of weeks. Many of the attacks appear to originate from Global Host , a low-cost virtual hosting provider. https://isc.sans.edu/diary/Web%20Scanning%20SonicWall%20for%20CVE-2021-20016%20-%20Update/31952 Google Update Patches Exploited Chrome Flaw Google released an update for Chrome. The update fixes two specific flaws reported by external researchers, CVE-2025-4664 and CVE-2025-4609. The first flaw is already being exploited in the wild. https://chromereleases.googleblog.com/2025/05/stable-channel-update-for-desktop_14.html https://x.com/slonser_/status/1919439373986107814 RVTools Bumblebee Malware Attack Zerodaylabs published its analysis of the RV-Tools Backdoor attack. It suggests that this may not be solely a search engine optimization campaign directing victims to the malicious installer, but that the RVTools distribution site was compromised. https://zerodaylabs.net/rvtools-bumblebee-malware/ Operation RoundPress ESET Security wrote up a report summarizing recent XSS attacks against open-source webmail systems https://www.welivesecurity.com/en/eset-research/operation-roundpress/
SANS Stormcast Thursday, May 15th: Google Open Redirects; Adobe, Ivanti, and Samsung patches
Another day, another phishing campaign abusing google.com open redirects Google s links from it s maps page to hotel listings do suffer from an open redirect vulnerability that is actively exploited to direct users to phishing pages. https://isc.sans.edu/diary/Another%20day%2C%20another%20phishing%20campaign%20abusing%20google.com%20open%20redirects/31950 Adobe Patches Adobe patched 12 different applications. Of particular interest is the update to ColdFusion, which fixes several arbitrary code execution and arbitrary file read problems. https://helpx.adobe.com/security/security-bulletin.html Samsung Patches magicInfo 9 Again Samsung released a new patch for the already exploited magicInfo 9 CMS vulnerability. While the description is identical to the patch released last August, a new CVE number is used. https://security.samsungtv.com/securityUpdates#SVP-MAY-2025 Ivanti Patches Critical Ivanti Neurons Flaw Ivanti released a patch for Ivanti Neurons for ITSM (on-prem only) fixing a critical authentication bypass vulnerability. Ivanti also points to its guidance to secure the underlying IIS server to make exploitation of flaws like this more difficult
SANS Stormcast Wednesday, May 14th: Microsoft Patch Tuesday; 0-Days patched for Ivanti Endpoint Manager and Fortinet Products
Microsoft Patch Tuesday Microsoft patched 70-78 vulnerabilities (depending on how you count them). Five of these vulnerabilities are already being exploited. In particular, a remote code execution vulnerability in the scripting engine should be taken seriously. It requires the Microsoft Edge browser to run in Internet Explorer mode. https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%3A%20May%202025/31946 Security Advisory Ivanti Endpoint Manager Mobile (EPMM) May 2025 (CVE-2025-4427 and CVE-2025-4428) Ivanti patched an authentication bypass vulnerability and a remote code execution vulnerability. The authentication bypass can exploit the remote code execution vulnerability without authenticating first. https://forums.ivanti.com/s/article/Security-Advisory-Ivanti-Endpoint-Manager-Mobile-EPMM?language=en_US Fortinet Patches Exploited Vulnerability in API (CVE-2025-32756) Fortinet patched an already exploited stack-based buffer overflow vulnerability in the API of multiple Fortinet products. The vulnerability is exploited via crafted HTTP requests. https://fortiguard.fortinet.com/psirt/FG-IR-25-254
SANS Stormcast Tuesday, May 12th: Apple Patches; Unipi Technologies Scans;
Apple Updates Everything Apple patched all of its operating systems. This update ports a patch for a recently exploited vulnerability to older versions of iOS and macOS. https://isc.sans.edu/diary/31942 It Is 2025, And We Are Still Dealing With Default IoT Passwords And Stupid 2013 Router Vulnerabilities Versions of the Mirai botnet are attacking devices made by Unipi Technology. These devices are using a specific username and password combination. In addition, this version of the Mirai botnet will also attempt exploits against an old Netgear vulnerability. https://isc.sans.edu/diary/It%20Is%202025%2C%20And%20We%20Are%20Still%20Dealing%20With%20Default%20IoT%20Passwords%20And%20Stupid%202013%20Router%20Vulnerabilities/31940 Output Messenger Vulnerability The internal messenger application Output Messenger is currently used in sophisticated attacks. Attackers are exploiting a path traversal vulnerability that has not been fixed. https://www.outputmessenger.com/cve-2025-27920/ Commvault Correction Commvault s patch indeed fixes the recent vulnerability. The Pioneer Release Will Dormann used to experiment will only offer patches after it has been registered, which leads to an error when assessing the patch s efficacy. https://www.darkreading.com/application-security/commvault-patch-works-as-intended
SANS Stormcast Monday, May 11th: Steganography Challenge; End-of-Life Routers; ASUS Driverhub; RV-Tools SEO Poisoning
Steganography Challenge Didier revealed the solution to last weekend s cryptography challenge. The image used the same encoding scheme as Didier described before, but the columns and rows were transposed. https://isc.sans.edu/forums/diary/Steganography%20Challenge%3A%20My%20Solution/31912/ FBI Warns of End-of-life routers The FBI is tracking larger botnets taking advantage of unpatched routers. Many of these routers are end-of-life, and no patches are available for the exploited vulnerabilities. The attackers are turning the devices into proxies, which are resold for various criminal activities. https://www.ic3.gov/PSA/2025/PSA250507 ASUS Driverhub Vulnerability ASUS Driverhub software does not properly check the origin of HTTP requests, allowing a CSRF attack from any website leading to arbitrary code execution. https://mrbruh.com/asusdriverhub/ RV-Tools SEO Poisoning Varonis Threat Labs observed SEO poisoning being used to trick system administrators into installing a malicious version of RV Tools. The malicious version includes a remote access tool leading to the theft of credentials https://www.varonis.com/blog/seo-poisoning#initial-access-and-persistence
SANS Stormcast Friday, May 9th: SSH Exfil Tricks; magicINFO still vulnerable; SentinelOne Vulnerability; Commvault insufficient patch
No Internet Access: SSH to the Rescue If faced with restrictive outbound network access policies, a single inbound SSH connection can quickly be turned into a tunnel or a full-blown VPN https://isc.sans.edu/diary/No%20Internet%20Access%3F%20SSH%20to%20the%20Rescue!/31932 SAMSUNG magicINFO 9 Server Flaw Still exploitable The SAMSUNG magicINFO 9 Server Vulnerability we found being exploited last week is apparently still not completely patched, and current versions are vulnerable to the exploit observed in the wild. https://www.huntress.com/blog/rapid-response-samsung-magicinfo9-server-flaw Bring Your Own Installer: Bypassing SentinelOne Through Agent Version Change Interruption SentinelOne s installer is vulnerable to an exploit allowing attackers to shut down the end point protection software https://www.aon.com/en/insights/cyber-labs/bring-your-own-installer-bypassing-sentinelone Commvault Still Exploitable A recent patch for Commvault is apparently ineffective and the PoC exploit published by watchTowr is still working against up to date patched systems https://infosec.exchange/@wdormann/114458913006792356