Wednesday, 18 February 2015

xlsm documents malware

xlsm documents are being spammed out, with an attached excel document containing a macro

These emails aren't from the various random companies at all, they are just being used to make the email look more genuine, ie. from a real company.
It's also worth remembering that the company itself  may not have any knowledge of this email and it's link(s) or attachment as it won't have come from their servers and IT systems but from an external bot net.

It's not advised to ring them as there won't really be anything they can do to help you.
Message Header: (Note: reference is random)
Subject: Claim [random ref]
Subject: Claims Documentation [random ref]
Subject: Invoice delivery failure [random ref]
Subject: Request error [random ref]
Subject: Requests documentation [random ref]
Subject: Copy [random] attaced

Message Body
Attachment: (Note: filename is random)

Md5 Hashes:
126041fb98c13fa24aea6be588fe8cc6 [1]
2b15e09af0148ce8a345f43d92de252a [2]
d927f8cff07f87c3c3f748604ab35896 [3]
fea3ab857813c0d65cd0b6b6233a834b [4]

Malware Macro document information:

VirusTotal Report [1] (hits 0/57 Virus Scanners)

VirusTotal Report [2] (hits 0/57 Virus Scanners)

VirusTotal Report [3] (hits 0/57 Virus Scanners)
VirusTotal Report [4] (hits 0/57 Virus Scanners)


The current round of Word and Excel attachments are targeted at Windows users.

Apple and Android software can open these attachments and may even manage to run the macro embedded inside the attachment.

The auto-download file is normally a windows executable and so will not currently run on  any operating system, apart from Windows.

However, if you are an Apple/Android user and forward the message to a Windows user, you will them put them at risk of opening the attachment and auto-downloading the malware.

Currently these attachments try to auto-download Dridex, which is designed to steal login information regarding your bank accounts (either by key logging, taking auto-screens hots or copying information from your clipboard (copy/paste))


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