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Tuesday, 14 April 2015

Malware spam: "Kairen Varker [mailto:kvarker@notifications.kashflow.com]" / "Invoice from"

This fake invoice has a malicious attachment:
From: Kairen Varker [mailto:kvarker@notifications.kashflow.com] On Behalf Of Kairen Varker
Sent: Tuesday, April 14, 2015 9:26 AM
Subject: Invoice from

I have made the changes need and the site is now mobile ready . Invoice is attached
In this case the attachment is called Invoice-83230.xls which is currently undetected by AV vendors. It contains this malicious macro [pastebin] which downloads a component from the following location (although there are probably more than this):


This is saved as %TEMP%\stepk1.5a.exe and has a VirusTotal detection rate of 3/57. Automated analysis tools [1] [2] [3] [4] shows the malware phoning home to: (TheFirst-RU, Russia) (UK2, UK) (OneGbits, Lithuania) (Sandton Telkom, South Africa) (Vultr Holdings / Choopa LLC, Canada) (OVH, Czech Republic) (RuWeb Corp, US) (Reg.Ru Hosting, RUssia) (StarNet SRL, Moldova)

The Malwr report shows that among other files it drops a malicious Dridex DLL with a detection rate of 2/57.

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