The Cardinal cybercrime group (aka Storm-1811, UNC4393), which operates the Black Basta ransomware, may have been exploiting a recently patched Windows privilege escalation vulnerability as a zero-day.
The vulnerability (CVE-2024-26169) occurs in the Windows Error Reporting Service. If exploited on affected systems, it can permit an attacker to elevate their privileges. The vulnerability was patched on March 12, 2024, and, at the time, Microsoft said there was no evidence of its exploitation in the wild. However, analysis of an exploit tool deployed in recent attacks revealed evidence that it could have been compiled prior to patching, meaning at least one group may have been exploiting the vulnerability as a zero-day.
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Source: Symantec
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