Cl0p Pwns Western Alliance Bank

 Western Alliance Bank over the weekend confirmed that it notified 21,899 people about an October 2024 data breach that compromised info such as SSNs, Tax ID Numbers, DOBs, Passports, etc. The infamous ransomware gang Clop has claimed responsibility for the breach. 

In a blog post reporting this news, Paul Bischoff, Consumer Privacy Advocate at Comparitech,wrote: 

“Clop, or Cl0p, is a high-profile ransomware group that first surfaced in 2019. Its latest wave of claims mostly involve exploiting vulnerabilities in the Cleo file transfer software, which is used by many organizations. Like some other ransomware groups, Clop doesn’t always encrypt files. Instead, it demands ransoms solely in exchange for not selling or publishing stolen data.”

“In 2024, Clop claimed nine confirmed ransomware attacks, plus 74 unconfirmed attacks that haven’t been acknowledged by the targeted organizations. 55 of the 74 unconfirmed claims are related to the same Cleo vulnerability used to breach Western Alliance Bank. In 2025, Cl0p has claimed responsibility for 332 unconfirmed attacks, the vast majority of which exploited Cleo.”

“Ransomware attacks on US finance can endanger clients and delay day-to-day operations until systems are restored. Banks and other financial institutions must either pay a ransom or face extended downtime, data loss, and putting customers at increased risk of fraud. In 2024, Comparitech researchers logged 61 confirmed ransomware attacks on the US finance sector, compromising more than 34.9 million records. The average ransom demand is $1.05 million.”

Clearly the fact that there’s a $10 million reward available for anyone who can serve up information on Cl0p has clearly not deterred them. Illustrating that crime does pay apparently. Speaking of rewards, if you do have information on Cl0p, this Tweet will help to get your info into the right hands.

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