Opera Code-Signing Breach: Malware Threat for Windows Users

Opera Software said Wednesday hackers pilfered from its internal systems at least one code-signing certificate that was used to sign malicious software. The Oslo-based company, which makes a mobile and desktop web browser, wrote in a blog post that it believes a few thousand Windows users may have automatically installed malicious software between 01.00 and 01.36 UTC on June 19, the day the attack was detected and halted.

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