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high severity December 16, 2025 · scope unconfirmed

Lanmark Group Listed by sinobi Ransomware Group

Lanmark Group, Inc. is a full-service general contracting firm based in Brooklyn, NY, founded in 2005. The company specializes in handling complex construction projects for both public and private sector clients, demonstrating a commitment to quality, safety, and client satisfaction. With a focus on meticulous planning and execution, Lanmark has established a strong reputation through their extensive portfolio of successful projects. Their expertise is showcased in multi-million dollar constructions, making them a trusted partner for state and municipal agencies.

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Severity High
Disclosed December 16, 2025
Affected Unconfirmed
Data exposed Internal files exfiltrated in ransomware attack
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