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ISC Stormcast For Friday, April 17th, 2026 https://isc.sans.edu/podcastdetail/9896, (Fri, Apr 17th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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Lumma Stealer infection with Sectop RAT (ArechClient2), (Fri, Apr 17th)
Introduction This diary provides indicators from a Lumma Stealer infection that was followed by Sectop RAT (ArechClient2). I searched for cracked versions of popular copyright-protected software, and I downloaded the initial malware after following the results of one such search. This is a common distribution technique for various families of malware, and I often find…
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ISC Stormcast For Thursday, April 16th, 2026 https://isc.sans.edu/podcastdetail/9894, (Thu, Apr 16th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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![[Guest Diary] Compromised DVRs and Finding Them in the Wild, (Thu, Apr 16th)](/wp-content/uploads/2026/04/2006-04-16_figure1_v2-NSZIcY.png)
[Guest Diary] Compromised DVRs and Finding Them in the Wild, (Thu, Apr 16th)
[This is a Guest Diary by Alec Jaffe, an ISC intern as part of the SANS.edu Bachelor’s Degree in Applied Cybersecurity (BACS) program [1]. Security cameras are great at monitoring physical doors, but terrible at locking their own digital ones. Across the internet, thousands of unpatched DVRs sit publicly exposed, many guarded only by the…
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ISC Stormcast For Wednesday, April 15th, 2026 https://isc.sans.edu/podcastdetail/9892, (Wed, Apr 15th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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Scanning for AI Models, (Tue, Apr 14th)
Starting March 10, 2026, my DShield sensor started getting probe for various AI models such as claude, openclaw, huggingface, etc. Reviewing the data already reported by other DShield sensors to ISC, the DShield database shows reporting of these probes started that day and has been active ever since. Based on what we currently have reported,…
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Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
This month’s Microsoft Patch Tuesday looks like a record one, but let’s look at it a bit closer to understand what is happening The update patches a total of 243 vulnerabilities. However, 78 of them are Chromium issues affecting Microsoft Edge. Patches for Edge were released earlier. This leaves 165 vulnerabilities that are not Edge-related.…
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ISC Stormcast For Tuesday, April 14th, 2026 https://isc.sans.edu/podcastdetail/9890, (Tue, Apr 14th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
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Scans for EncystPHP Webshell, (Mon, Apr 13th)
Last week, I wrote about attackers scanning for various webshells, hoping to find some that do not require authentication or others that use well-known credentials. But some attackers are paying attention and are deploying webshells with more difficult-to-guess credentials. Today, I noticed some scans for what appears to be the “EncystPHP” web shell. Fortinet wrote about…
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ISC Stormcast For Monday, April 13th, 2026 https://isc.sans.edu/podcastdetail/9888, (Mon, Apr 13th)
(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
