New rule (Spam): Mastercard promotional content #3416
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This rule detects spam messages promoting untrustworthy Mastercard credit cards, focusing on messages with image-based content. It applies additional scrutiny to high-trust sender domains that fail DMARC authentication.
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Latest hunt looks good: https://platform.sublime.security/messages/hunt?huntId=019a4ae6-f63a-7048-ad2b-9c8fb4640e8e |
zoomequipd
approved these changes
Nov 5, 2025
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Description
Detects messages promoting untrustworthy Mastercard credit cards that contain both financial communications and promotional content topics, with the message body primarily consisting of image content rather than text. Excludes legitimate payment-related Mastercard communications and applies additional scrutiny to high-trust sender domains that fail DMARC authentication.
Associated samples