Websites offering cracked versions of popular software programs have recently been serving up adware bundles that secretly deliver a variant of STOP ransomware.
According to a pair of reports from Bleeping Computer founder Lawrence Abrams, the scheme came to light in December 2018 with the appearance of the malicious encryptor "Djvu" – so named because it appends one of several .djvu string variations to affected files as an extension. Determined to be a member of the STOP family, Djvu later morphed into other minor variants that appended different extensions, including. tco and .rumba.
Bleeping Computer pinpointed the attack vector after user discussions in its forums and other sites revealed a common denominator: victims were infected after visiting one of several websites where they downloaded cracked versions of software products, including Microsoft Windows-based programs, Cubase, Adobe Photoshop, antivirus software and more.
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