Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: A "Stream O" Maldoc SANS ISC InfoSec Forums

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A "Stream O" Maldoc

Reader Robert submitted a malicious document. It just happens to be a maldoc with the payload hidden in a user form, as discussed in diary entry "Maldoc: Payloads in User Forms" last weekend.

I'm using plugin plugin_stream_o to view the payload.

This output is more user-friendly: it's a XLS/XLST file with malicious JScript: a downloader:

Didier Stevens
Senior handler
Microsoft MVP
blog.DidierStevens.com DidierStevensLabs.com

DidierStevens

399 Posts
ISC Handler

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