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Obfuscated JavaScript or Nothing, (Thu, Apr 9th)
I spotted an interesting piece of JavaScript code that was delivered via a phishing email in a RAR archive. The file was called “cbmjlzan.JS” (SHA256:a8ba9ba93b4509a86e3d7dd40fd0652c2743e32277760c5f7942b788b74c5285) and is only identified as malicious by 15 AV’s on VirusTotal[1]. The file is pretty big (10MB) and contains a copy of the AsmDB project lib[2]. The purpose is unknown.…
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ISC Stormcast For Thursday, April 9th, 2026 https://isc.sans.edu/podcastdetail/9886, (Thu, Apr 9th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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Number Usage in Passwords: Take Two, (Thu, Apr 9th)
In a previous diary [1], we looked to see how numbers were used within passwords submitted to honeypots. One of the items of interest was how dates, and more specifically years, were represented within the data and how that changed over time. It is often seen that years and seasons are used in passwords, especially…
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TeamPCP Supply Chain Campaign: Update 007 – Cisco Source Code Stolen via Trivy-Linked Breach, Google GTIG Tracks TeamPCP as UNC6780, and CISA KEV Deadline Arrives with No Standalone Advisory, (Wed, Apr 8th)
This is the seventh update to the TeamPCP supply chain campaign threat intelligence report, “When the Security Scanner Became the Weapon” (v3.0, March 25, 2026). Update 006 covered developments through April 3, including the CERT-EU European Commission breach disclosure, ShinyHunters’ confirmation of credential sharing, Sportradar breach details, and Mandiant’s quantification of 1,000+ compromised SaaS environments. This update consolidates five…
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More Honeypot Fingerprinting Scans, (Wed, Apr 8th)
One question that often comes up when I talk about honeypots: Are attackers able to figure out if they are connected to a honeypot? The answer is pretty simple: Yes! Most “medium interaction” honeypots, like the one we are using, are just simulating various systems. These simulations are incomplete. For example, we are using the…
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ISC Stormcast For Wednesday, April 8th, 2026 https://isc.sans.edu/podcastdetail/9884, (Wed, Apr 8th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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A Little Bit Pivoting: What Web Shells are Attackers Looking for?, (Tue, Apr 7th)
Webshells remain a popular method for attackers to maintain persistence on a compromised web server. Many “arbitrary file write” and “remote code execution” vulnerabilities are used to drop small files on systems for later execution of additional payloads. The names of these files keep changing and are often chosen to “fit in” with other files. Webshells themselves…
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ISC Stormcast For Tuesday, April 7th, 2026 https://isc.sans.edu/podcastdetail/9882, (Tue, Apr 7th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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How often are redirects used in phishing in 2026?, (Mon, Apr 6th)
In one of his recent diaries, Johannes discussed how open redirects are actively being sought out by threat actors[1], which made me wonder about how commonly these mechanisms are actually misused… Although open redirect is not generally considered a high-impact vulnerability on its own, it can have multiple negative implications. Johannes already covered one in…
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ISC Stormcast For Monday, April 6th, 2026 https://isc.sans.edu/podcastdetail/9880, (Mon, Apr 6th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
