SmartTube Android App Compromise The key a developer used to sign the Android YouTube player SmartTube was compromised and used to publish a malicious version. https://github.com/yuliskov/SmartTube/issues/5131#issue-3670629826 https://github.com/yuliskov/SmartTube/releases/tag/notification Two Years, 17K Downloads: The NPM Malware That Tried to Gaslight Security Scanners Over the course of two years, a malicious NPM package Read More

Hunting for SharePoint In-Memory ToolShell Payloads A walk-through showing how to analyze ToolShell payloads, starting with acquiring packets all the way to decoding embedded PowerShell commands. https://isc.sans.edu/diary/%5BGuest%20Diary%5D%20Hunting%20for%20SharePoint%20In-Memory%20ToolShell%20Payloads/32524 Android Security Bulletin December 2025 Google fixed numerous vulnerabilities with its December Android update. Two of these vulnerabilities are already being exploited. https://source.android.com/docs/security/bulletin/2025-12-01 Read More

Fake adult websites pop realistic Windows Update screen to deliver stealers via ClickFix The latest variant of ClickFix tricks users into copy/pasting commands by displaying a fake blue screen of death. https://www.acronis.com/en/tru/posts/fake-adult-websites-pop-realistic-windows-update-screen-to-deliver-stealers-via-clickfix/ B2B Guest Access Creates an Unprotected Attack Vector Users may be tricked into joining an external Teams workspace Read More

Spyware Allows Cyber Threat Actors to Target Users of Messaging Applications Spyware attacks messaging applications in part by triggering vulnerabilities in messaging applications but also by deploying tools like keystroke loggers and screenshot applications. https://www.cisa.gov/news-events/alerts/2025/11/24/spyware-allows-cyber-threat-actors-target-users-messaging-applications Stop Putting Your Passwords Into Random Websites Yes. Just Stop! https://labs.watchtowr.com/stop-putting-your-passwords-into-random-websites-yes-seriously-you-are-the-problem/ Fluentbit Vulnerability https://www.oligo.security/blog/critical-vulnerabilities-in-fluent-bit-expose-cloud-environments-to-remote-takeover Happy Read More

Conflicts between URL mapping and URL based access control. Mapping different URLs to the same script, and relying on URL based authentication at the same time, may lead to dangerous authentication and access control gaps. https://isc.sans.edu/diary/Conflicts%20between%20URL%20mapping%20and%20URL%20based%20access%20control./32518 Sha1-Hulud, The Second Coming A new, destructive variant of the Shai-Hulud worm is currently Read More

Use of CSS stuffing as an obfuscation technique? Phishing sites stuff their HTML with benign CSS code. This is likely supposed to throw of simple detection engines https://isc.sans.edu/diary/Use%20of%20CSS%20stuffing%20as%20an%20obfuscation%20technique%3F/32510 Critical Oracle Identity Manager Flaw Possibly Exploited as Zero-Day Early exploit attempts for the vulnerability were part of Searchlight Cyber s research Read More

Oracle Identity Manager Exploit Observation from September (CVE-2025-61757) We observed some exploit attempts in September against an Oracle Identity Manager vulnerability that was patched in October, indicating that exploitation may have occurred prior to the patch being released. https://isc.sans.edu/diary/Oracle%20Identity%20Manager%20Exploit%20Observation%20from%20September%20%28CVE-2025-61757%29/32506 https://slcyber.io/research-center/breaking-oracles-identity-manager-pre-auth-rce/ DigitStealer: a JXA-based infostealer that leaves little footprint https://www.jamf.com/blog/jtl-digitstealer-macos-infostealer-analysis/ SonicWall Read More

Unicode: It is more than funny domain names. Unicode can cause a number of issues due to odd features like variance selectors and text direction issues. https://isc.sans.edu/diary/Unicode%3A%20It%20is%20more%20than%20funny%20domain%20names./32472 FortiWeb Multiple OS command injection in API and CLI A second silently patched vulnerability in FortiWeb is already being exploited in the wild. Read More

KongTuke Activity This diary investigates how a recent Kong Tuke infections evolved all the way from starting with a ClickFix attack. https://isc.sans.edu/diary/KongTuke%20activity/32498 Cloudflare Outage Cloudflare suffered a large outage today after an oversized configuration file was loaded into its bot protection service https://x.com/dok2001 Google Patches Chrome 0-Day Google patched two Read More

Decoding Binary Numeric Expressions Didier updated his number to hex script to support simple arithmetic operations in the text. https://isc.sans.edu/diary/Decoding%20Binary%20Numeric%20Expressions/32490 Tea Token NPM Pollution The NPM repository was hit with around 150,000 submissions that did not contain any useful contributions, but instead attempted to fake contributions to earn a new Read More

Fortiweb Vulnerability Fortinet, with significant delay, acknowledged a recently patched vulnerability after exploit attempts were seen publicly. https://isc.sans.edu/diary/Honeypot+FortiWeb+CVE202564446+Exploits/32486 https://labs.watchtowr.com/when-the-impersonation-function-gets-used-to-impersonate-users-fortinet-fortiweb-auth-bypass/ https://fortiguard.fortinet.com/psirt/FG-IR-25-910?ref=labs.watchtowr.com Flnger.exe and ClickFix Attackers started to use the finger.exe binary to retrieve additional payload in ClickFix attacks https://isc.sans.edu/diary/Finger.exe%20%26%20ClickFix/32492

SmartApeSG campaign uses ClickFix page to push NetSupport RAT A detailed analysis of a recent SamtApeSG campaign taking advantage of ClickFix https://isc.sans.edu/diary/32474 Formbook Delivered Through Multiple Scripts An analysis of a recent version of Formbook showing how it takes advantage of multiple obfuscation tricks https://isc.sans.edu/diary/32480 sudo-rs vulnerabilities Two vulnerabilities were Read More

OWASP Top 10 2025 Release Candidate OWASP published a release candidate for the 2025 version of its Top 10 list https://owasp.org/Top10/2025/0x00_2025-Introduction/ Citrix/Cisco Exploitation Details Amazon detailed how Citrix and Cisco vulnerabilities were used by advanced actors to upload webshells https://aws.amazon.com/blogs/security/amazon-discovers-apt-exploiting-cisco-and-citrix-zero-days/ Testing Quantum Readyness A website tests your services for post-quantum Read More

Microsoft Patch Tuesday for November 2025 https://isc.sans.edu/diary/Microsoft+Patch+Tuesday+for+November+2025/32468/ Gladinet Triofox Vulnerability Triofox uses the host header in lieu of proper access control, allowing an attacker to access the page managing administrators by simply setting the host header to localhost. https://cloud.google.com/blog/topics/threat-intelligence/triofox-vulnerability-cve-2025-12480/ SAP November 2025 Patch Day SAP fixed a critical vulnerability, fixed Read More

It isn t always defaults: Scans for 3CX Usernames Our honeypots detected scans for usernames that may be related to 3CX business phone systems https://isc.sans.edu/diary/It%20isn%27t%20always%20defaults%3A%20Scans%20for%203CX%20usernames/32464 Watchguard Default Password Controversy A CVE number was assigned to a default password commonly used in Watchguard products. This was a documented username and password Read More

Honeypot Requests for Code Repository Attackers continue to scan websites for source code repositories. Keep your repositories outside your document root and proactively scan your own sites. https://isc.sans.edu/diary/Honeypot%3A%20Requests%20for%20%28Code%29%20Repositories/32460 Malicious NuGet Packages Deliver Time-Delayed Destructive Payloads Newly discovered malicious .NET packages attempt to deliver a time-delayed attack targeting ICS systems. https://socket.dev/blog/9-malicious-nuget-packages-deliver-time-delayed-destructive-payloads Read More

Binary Breadcrumbs: Correlating Malware Samples with Honeypot Logs Using PowerShell [Guest Diary] Windows, with PowerShell, has a great scripting platform to match common Linux/Unix command line utilities. https://isc.sans.edu/diary/Binary%20Breadcrumbs%3A%20Correlating%20Malware%20Samples%20with%20Honeypot%20Logs%20Using%20PowerShell%20%5BGuest%20Diary%5D/32454 RondoDox v2 Increases Exploits The RondoDox (or RondoWorm) added a substantial amount of new exploits to its repertoire. https://beelzebub.ai/blog/rondo-dox-v2/ Google Chrome Updates Read More

Updates to Domainname API Some updates to our domainname API will make it more flexible and make it easier and faster to get the complete dataset. https://isc.sans.edu/diary/Updates%20to%20Domainname%20API/32452 Microsoft Teams Impersonation and Spoofing Vulnerabilities Checkpoint released details about recently patched spoofing and impersonation vulnerabilities in Microsoft Teams https://research.checkpoint.com/2025/microsoft-teams-impersonation-and-spoofing-vulnerabilities-exposed/ NViso Report: VSHELL Read More

Apple Patches Everything, Again Apple released a minor OS upgrade across its lineup, fixing a number of security vulnerabilities. https://isc.sans.edu/diary/Apple%20Patches%20Everything%2C%20Again/32448 Remote Access Tools Used to Compromise Trucking and Logistics Attackers infect trucking and logistics companies with regular remote management tools to inject malware into other companies or learn about high-value Read More

XWiki SolrSearch Exploit Attempts CVE-2025-24893 We have detected a number of exploit attempts against XWiki taking advantage of a vulnerability that was added to the KEV list on Friday. https://isc.sans.edu/diary/XWiki%20SolrSearch%20Exploit%20Attempts%20%28CVE-2025-24893%29%20with%20link%20to%20Chicago%20Gangs%20Rappers/32444 AMD Zen 5 Random Number Generator Bug The RDSEED function for AMD s Zen 5 processors does return 0 more Read More