SANS Stormcast: Daily Cyber Security News

Getting Past PyArmor PyArmor is a python obfuscation tool used for malicious and non-malicious software. Xavier is taking a look at a sample to show what can be learned from these obfuscated samples with not too much work. https://isc.sans.edu/diary/Obfuscated%20Malicious%20Python%20Scripts%20with%20PyArmor/31840 CenterStack RCE CVE-2025-30406 Gladinet s CenterStack secure file-sharing software su...

Microsoft Patch Tuesday Microsoft patched over 120 vulnerabilities this month. 11 of these were rated critical, and one vulnerability is already being exploited. https://isc.sans.edu/diary/Microsoft%20April%202025%20Patch%20Tuesday/31838 Adobe Updates Adobe released patches for 12 different products. In particular important are patches for Coldfusion addressing several remote code execution vulner...

XORsearch: Searching With Regexes Didier explains a workaround to use his tool XORsearch to search for regular expressions instead of simple strings. https://isc.sans.edu/diary/XORsearch%3A%20Searching%20With%20Regexes/31834 MCP Security Notification: Tool Poisoning Attacks Invariant labs summarized a critical weakness in the Model Context Protocol (MCP) that allows for "Tool Poisoning Attacks." M...

New SSH Username Report A new ssh/telnet username reports makes it easier to identify new usernames attackers are using against our telnet and ssh honeypots https://isc.sans.edu/diary/New%20SSH%20Username%20Report/31830 Quickshell Sharing is Caring: About an RCE Attack Chain on Quick Share The Google Quick Share protocol is susceptible to several vulnerabilities that have not yet been fully patche...

Exploring Statistical Measures to Predict URLs as Legitimate or Intrusive Using frequency analysis, and training the model with honeypot data as well as log data from legitimate websites allows for a fairly simple and reliable triage of web server logs to identify possible malicious activity. https://isc.sans.edu/diary/Exploring%20Statistical%20Measures%20to%20Predict%20URLs%20as%20Legitimate%20or...

Surge in Scans for Juniper t128 Default User Lasst week, we dedtect a significant surge in ssh scans for the username t128 . This user is used by Juniper s Session Smart Routing, a product they acquired from 128 Technologies which is the reason for the somewhat unusual username. https://isc.sans.edu/diary/Surge%20in%20Scans%20for%20Juniper%20%22t128%22%20Default%20User/31824 Vulnerable Verizon API...

Apple Patches Everything Apple released updates for all of its operating systems. Most were released on Monday with WatchOS patches released today on Tuesday. Two already exploited vulnerabilities, which were already patched in the latest iOS and macOS versions, are now patched for older operating systems as well. A total of 145 vulnerabilities were patched. https://isc.sans.edu/diary/Apple%20Patc...

Apache Camel Exploit Attempt by Vulnerability Scans A recently patched vulnerability in Apache Camel has been integrated into some vulnerability scanners, like for example OpenVAS. We do see some exploit attempts in our honeypots, but they appear to be part of internal vulnerablity scans https://isc.sans.edu/diary/Apache%20Camel%20Exploit%20Attempt%20by%20Vulnerability%20Scan%20%28CVE-2025-27636%2...

A Tale of Two Phishing Sties Two phishing sites may use very different backends, even if the site itself appears to be visually very similar. Phishing kits are often copied and modified, leading to sites using similar visual tricks on the user facing site, but very different backends to host the sites and reporting data to the miscreant. https://isc.sans.edu/diary/A%20Tale%20of%20Two%20Phishing%20...

Sitecore "thumbnailsaccesstoken" Deserialization Scans (and some new reports) CVE-2025-27218 Our honeypots detected a deserialization attack against the CMS Sitecore using a thumnailaccesstoken header. The underlying vulnerability was patched in January, and security firm Searchlight Cyber revealed details about this vulnerability a couple of weeks ago. https://isc.sans.edu/diary/Sitecore%20%22thu...

Leveraging CNNs and Entropy-Based Feature Selection to Identify Potential Malware Artifacts of Interest This diary explores a novel methodology for classifying malware by integrating entropy-driven feature selection with a specialized Convolutional Neural Network (CNN). Motivated by the increasing obfuscation tactics used by modern malware authors, we will focus on capturing high-entropy segments...

XWiki Search Vulnerablity Exploit Attempts (CVE-2024-3721) Our honeypot detected an increase in exploit attempts for an XWiki command injection vulnerablity. The vulnerability was patched last April, but appears to be exploited more these last couple days. The vulnerability affects the search feature and allows the attacker to inject Groovy code templates. https://isc.sans.edu/diary/X-Wiki%20Searc...

Privacy Aware Bots A botnet is using privacy as well as CSRF prevention headers to better blend in with normal browsers. However, in the process they may make it actually easier to spot them. https://isc.sans.edu/diary/Privacy%20Aware%20Bots/31796 Critical Ingress Nightmare Vulnerability ingress-nginx fixed four new vulnerabilities, one of which may lead to a Kubernetes cluster compromise. Note th...

Critical Next.js Vulnerability CVE-2025-29927 A critical vulnerability in how the x-middleware-subrequest header is verified may lead to bypassing authorization in Next.js applications. https://zhero-web-sec.github.io/research-and-things/nextjs-and-the-corrupt-middleware https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw https://www.runzero.com/blog/next-js/ Microsoft Trust...

Some New Data Feeds and Little Incident We started offering additional data feeds, and an SEO spamer attempted to make us change a link from an old podcast episode. https://isc.sans.edu/diary/Some%20new%20Data%20Feeds%2C%20and%20a%20little%20%22incident%22./31786 Veeam Deserialization Vulnerability Veeam released details regarding the latest vulnerablity in Veeam, pointing out the insufficient pat...

Exploit Attempts for Cisco Smart Licensing Utility CVE-2024-20439 CVE-2024-20440 Attackers added last September's Cisco Smart Licensing Utility vulnerability to their toolset. These attacks orginate most likely from botnets and the same attackers are scanning for a wide range of additional vulnerabilities. The vulnerability is a static credential issue and trivial to exploit after the credentials...

Python Bot Delivered Through DLL Side-Loading A "normal", but vulnerable to DLL side-loading PDF reader may be used to launch additional exploit code https://isc.sans.edu/diary/Python%20Bot%20Delivered%20Through%20DLL%20Side-Loading/31778 Tomcat RCE Correction To exploit the Tomcat RCE I mentioned yesterday, two non-default configuration options must be selected by the victim. https://x.com/dkx026...

Static Analysis of GUID Encoded Shellcode Didier explains how to decode shell code embeded as GUIDs in malware, and how to feed the result to his tool 1768.py which will extract Cobal Strike configuration information from the code. https://isc.sans.edu/diary/Static%20Analysis%20of%20GUID%20Encoded%20Shellcode/31774 SAMLStorm: Critical Authentication Bypass in xml-crypto and Node.js libraries xml-c...

Mirai Bot Now Incorporating Malformed DrayTek Vigor Router Exploits One of the many versions of the Mirai botnet added some new exploit strings attempting to take advantage of an old DrayTek Vigor Router vulnerability, but they got the URL wrong. https://isc.sans.edu/diary/Mirai%20Bot%20now%20incroporating%20%28malformed%3F%29%20DrayTek%20Vigor%20Router%20Exploits/31770 Compromised GitHub Action T...

File Hashes Analysis with Power BI Guy explains in this diary how to analyze Cowrie honeypot file hashes using Microsoft's BI tool and what you may be able to discover using this tool. https://isc.sans.edu/diary/File%20Hashes%20Analysis%20with%20Power%20BI%20from%20Data%20Stored%20in%20DShield%20SIEM/31764 Apache Camel Vulnerability Apache released two patches for Camel in close succession. Initia...

Log4J Scans for VMWare Hyhbrid Cloud Extensions An attacker is scanning various login pages, including the authentication feature in the VMWare HCX REST API for Log4j vulnerabilities. The attack submits the exploit string as username, hoping to trigger the vulnerability as Log4j logs the username https://isc.sans.edu/diary/Scans%20for%20VMWare%20Hybrid%20Cloud%20Extension%20%28HCX%29%20API%20(Log4...

Microsoft Patch Tuesday Microsoft Patched six already exploited vulnerabilities today. In addition, the patches included a critical patch for Microsoft's DNS server and about 50 additional patches. https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%3A%20March%202025/31756 Apple Updates iOS/macOS Apple released an update to address a single, already exploited, vulnerability in WebKit. This vuln...

Shellcode Encoded in UUIDs Attackers are using UUIDs to encode Shellcode. The 128 Bit (or 16 Bytes) encoded in each UUID are converted to shell code to implement a cobalt strike beacon https://isc.sans.edu/diary/Shellcode%20Encoded%20in%20UUIDs/31752 Moxa CVE-2024-12297 Expanded to PT Switches Moxa in January first releast an update to address a fronted authorizaation logic disclosure vulnerabilit...

Commonly Probed Webshell URLs Many attackers deploy web shells to gain a foothold on vulnerable web servers. These webshells can also be taken over by parasitic exploits. https://isc.sans.edu/diary/Commonly%20Probed%20Webshell%20URLs/31748 Undocumented ESP32 Commands A recent conference presentation by Tarlogic revealed several "backdoors" or undocumented features in the commonly used ESP32 Chipse...

Latest Google Chrome Update Encourages UBlock Origin Removal The latest update to Google Chrome not only disabled the UBlock Origin ad blocker, but also guides users to uninstall the extension instead of re-enabling it. https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop.html https://www.reddit.com/r/youtube/comments/1j2ec76/ublock_origin_is_gone/ Critical Kibana Update...