SophosLabs has apparent a new spam advance area ransomware is downloaded and run by a macro hidden central a Word certificate that is in about-face nested within a PDF, like a Russian matryoshka doll. The ransomware in this case appears to be a alternative of Locky.
Most antivirus filters apperceive how to admit apprehensive macros in documents, but ambuscade those certificate central a PDF could be a acknowledged way to sidestep it, according to SophosLabs researchers.
Following the archetypal pattern, this latest ransomware advance comes as emailed spam with a PDF attachment:
The PDF has an absorbed certificate inside, which is aggravating to get opened by the Acrobat Reader:
Once the doc is opened in MS Word, it asks you to accredit alteration through a amusing engineering attack:
This runs a VBA macro, which downloads and runs the crypto ransomware.
There are things bodies can do to bigger assure themselves from this array of thing:
Sophos detected the PDF as Troj/PDFDoc-C and the burden as Troj/Locky-UP.
Other links we anticipate you’ll acquisition useful:
Techknow podcast — Dealing with Ransomware:
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