Private equity giant Apollo Global Management has disclosed a data breach that exposed sensitive personal information.
According to a data breach notice sent to affected individuals, a social engineering attack enabled threat actors to access some of the company’s cloud platforms between July 6 and 10.
An investigation is ongoing, but Apollo determined recently that personal information may have been compromised, including names, contact information, and SSNs.
The company has not shared any information about who is behind the attack, but noted that it found no evidence that the compromised personal information was made public or used for fraud. Nevertheless, impacted individuals are being offered identity protection and credit monitoring services.
It’s unclear how many individuals are affected by the data breach.
The private equity firm, which has roughly $1.05 trillion of assets under management, appears to be one of the victims of a campaign conducted by a cybercrime group tracked as UNC6671 and BlackFile.
The group, which emerged in early 2026, has been using IT helpdesk-themed vishing attacks to target organizations across North America, Australia and the UK. The hackers recently rebranded and diversified operations, with the latest attacks focusing on the private equity, financial services, and professional services sectors.
Among the organizations that researchers and reporting indicate were targeted in the BlackFile-linked vishing campaign are private equity and investment firms including Blackstone, Bain Capital, KKR, TPG, Bridgewater Associates, Clearlake Capital, and CME Group, as well as hedge funds such as Point72, Citadel, Two Sigma, and Millennium Management.
This is a list of targeted organizations based on observed phishing infrastructure, domain registrations, or reported intrusion attempts; it does not imply they have been breached.
Public disclosures confirm a successful data compromise only in the case of Apollo, and several of the named entities have stated that they detected or blocked attempts with no evidence of data theft.
The BlackFile group appears to be highly successful. Google Threat Intelligence Group (GTIG) recently reported that it received over $10 million in Bitcoin ransom payments between January and May.
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