MS13089 is a newly emerged ransomware group (first observed December 2025) that named itself after a 2013 Microsoft Security Bulletin, claiming a handful of victims including a law firm, operating primarily as a double-extortion actor.
This group has 5 victims. The victim list API is currently responding slowly for this dataset. Country, sector, and infostealer breakdowns are not available at this time. Basic stats (victim count, first/last seen) are shown above from a faster data source.
Don't let email issues hurt your business reputation.
Our cybersecurity team helps you fix SPF, DKIM, DMARC and protect your sender reputation. Get a free 30-minute consultation with a security expert.
