Collaborate Disseminate
Yesterday, a reader reported to us a malicious ZIP archive (SHA256: a0104921a2d37ab87482ac9a9f5c3713479c118846c3e999178e75b81620c094[1]). Once unzipped, it contains a VHDX file that discloses a malicious JavaScript after being mounted (which is automatic on modern Windows OSs):
Continue reading From a VHDX File to a Remcos RAT, (Tue, Jun 16th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Tuesday, June 16th, 2026 https://isc.sans.edu/podcastdetail/9974, (Tue, Jun 16th)
I like it when a fellow handler posts a diary entry about images with malicious content. Last one is Xavier: “The Evil MSI Background is Back!“.
Continue reading Evil MSI Background: BASE64 Statistical Analysis, (Mon, Jun 15th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Monday, June 15th, 2026 https://isc.sans.edu/podcastdetail/9972, (Mon, Jun 15th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Friday, June 12th, 2026 https://isc.sans.edu/podcastdetail/9970, (Fri, Jun 12th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Thursday, June 11th, 2026 https://isc.sans.edu/podcastdetail/9968, (Thu, Jun 11th)
Back in 2023, I wrote a diary[1] discussing how commonly X-Frame-Options and CSP headers containing the frame-ancestors directive were used on 1 million most popular domains on the internet (based on the Tranco list[2]), and how they were set. Given that three years have passed since then, I thought it might be interesting to repeat the analysis and see what – if anything – has changed in the meantime.
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Wednesday, June 10th, 2026 https://isc.sans.edu/podcastdetail/9966, (Wed, Jun 10th)
Microsoft today released patches for 204 vulnerabilities. 38 of these vulnerabilities are considered critical, and three have been disclosed before today. Six of the vulnerabilities affect Microsoft cloud solutions and do not require any user action. In addition, Microsoft incorporated 360 different vulnerabilities affecting Chromium into its Edge browser.
Continue reading Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License. Continue reading ISC Stormcast For Tuesday, June 9th, 2026 https://isc.sans.edu/podcastdetail/9964, (Tue, Jun 9th)