By CBSLA Staff

LOS ANGELES (CBSLA) – Companies and organizations in Los Angeles County are being warned about a recent slew of cybersecurity threats from hackers.

The L.A. County Sheriff’s Department Fraud & Cyber Crimes Bureau (FCCB) Thursday announced that it had received reports that the servers of several organizations had been compromised, including those of law enforcement agencies.

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A recent “server vulnerability” allows “attackers to gain persistent system access, compromise authentication methods, and exfiltrate data and email files by executing code on vulnerable Microsoft Exchange Servers,” the FCCB wrote.

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Hackers were able to access the servers even after the organizations had patched their systems with updates.

“Reports showed attackers have established backdoors and/or installed malware on systems once gaining access,” the FCCB wrote.

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Organizations were urged to patch their systems with March 2021 Exchange Server Security Updates and to run the Microsoft Exchange On-Premise mitigation tool.