Date: Mon, 14 Jul 2014 16:12:49 +0000 [12:12:49 EDT]Attached to the message is an archive file Internal Only - victimdomain which in turn contains a malicious executable Internal Only.scr which has a VirusTotal detection rate of 9/54 which indicates that this is a variant of Upatre. The Malwr analysis shows that it contacts the following URLs:
From: Administrator [Administrator@victimdomain]
Subject: Important - Internal Only
File Validity: 07/14/2014
Company : http://victimdomain
File Format: Office - Excel ,PDF
Name: Internal Only
Legal Copyright: © Microsoft Corporation. All rights reserved.
Original Filename: Internal Only.pdf
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This drops a few files, including mkird.exe which has a VirusTotal detection rate of 6/54 (Malwr analysis here) and an encoded file 404.tar which only McAfee spots as being suspect (Upatre-Enc.b).
Blocking the following domains may give some protection: