ISC Stormcast For Friday, April 17th, 2026 https://isc.sans.edu/podcastdetail/9896, (Fri, Apr 17th)
2026-04-18T01:23:52Z•80f3818e023938bf96db9633f60c84f839660504de1abd6d4313cadf762d7ba9
AI model scanningArechClient2DShieldDVR compromiseEncystPHPFreePBXIoTLumma StealerMicrosoft Patch TuesdaySectop RATpatchingreconnaissancethreat intelligencevulnerability managementwebshell
What happened
SANS ISC diary entries from April 13–17, 2026 cover multiple active threats and notable telemetry: a reported Lumma Stealer infection delivering the Sectop RAT (ArechClient2); widespread scanning for the EncystPHP webshell (noted against FreePBX systems); discovery of compromised DVRs and methods for finding them in the wild; new probe activity (starting 2026-03-10) scanning for AI model endpoints (claude, openclaw, huggingface, etc.) observed via DShield sensors; and commentary on a large April 2026 Microsoft Patch Tuesday. These items indicate ongoing malware distribution, targeted webshell/
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- sans_isc_diary
- Record identifier
- 80f3818e023938bf96db9633f60c84f839660504de1abd6d4313cadf762d7ba9
- Enrichment time
- 2026-04-18T01:23:52Z
- AI-assisted enrichment
- Yes
This record may overlap with other records. Its enrichment can be incomplete or wrong, and machine assistance was used. Validate consequential decisions against the linked source and your own environment.