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Mallory

Weyhro

Also known asweyhro

Weyhro is an emerging ransomware/extortion group first listed as a new ransomware variant appearing in March 2024. Reporting in the provided content places it among new and emerging ransomware groups observed through 2025. Flashpoint states that Weyhro, like RansomHub, shifted to a pure extortion model and ditched encryption. Dragos also lists Weyhro among new/emerging ransomware groups observed in Q1 2025. The content further notes that LockBit 5.0 was assessed to have reposted victim data taken from other groups, including Weyhro, indicating Weyhro operated a leak site or public victim-claiming mechanism. Mentioned victim claims attributed to Weyhro include Avantune, Fragola S.p.A, MBI International, Resnick & Caffrey, CELCO Inc, Montgomery, Little & Soran, Terra Construction, Valens Bank Pay Exchange, Adriatic Glass & Mirrors, McMillan James Equipment Company, 101 Arch Street, Synergy Investments, Community Services of Missouri, and Chemtron RiverBend. The content does not attribute Weyhro to a nation-state and does not provide confirmed aliases or sub-groups beyond the name Weyhro itself.

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Tradecraft mapping

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Malware arsenal

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Exploited CVEs

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