YouTube serves every video thumbnail in two formats. The JPEG lives under https://i.ytimg.com/vi/VIDEO_ID/ and the WebP under https://i.ytimg.com/vi_webp/VIDEO_ID/, same file names (maxresdefault, sddefault, hqdefault, and so on). The usual advice is "use the WebP, it is smaller." yt-dlp's issue tracker has a long thread arguing the opposite,... Weiterlesen
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YouTube's WebP thumbnails are half the bytes of the JPEG at 1280x720. At 480x360 they are often bigger. 1,000 videos measured.
YouTube serves every video thumbnail in two formats. The JPEG lives under https://i.ytimg.com/vi/VIDEO_ID/ and the WebP under https://i.ytimg.com/vi_webp/VIDEO_ID/, same file names (maxresdefault, sddefault, hqdefault, and so on). The…
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1-Click Detection Engineering: Sigma & YARA Rules
SOC Readytitle: Detect Exploitation - YouTube's WebP thumbnails are half the bytes of the JPEG at 1280x720. At 480x360 they are often bigger. 1,000 videos measured.
id: a7c67c89-6280-4e6d-a9b9-e455ba9072f1
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-23
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-23"
description = "YARA Signature for "
strings:
$str = "YouTube\'s WebP thumbnails are " ascii wide
condition:
any of them
}
SOCIAL SHARE CARD GENERATOR