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Wednesday 1 April 2015

Malware spam: "Your Remittance Advice COMPANY NAME"

Yet another malware spam run today, this time from randomly-named but legitimate companies, for example:

From:    Kate Coffey
Date:    1 April 2015 at 15:00
Subject:    Your Remittance Advice PEEL SOUTH EAST

Dear sir or Madam,

Please find attached a remittance advice (JT934IYIP.doc) for your information.
Should you need any further information, please do not hesitate to contact us.

Best regards

Attached is a Word document with a filename matching the body one in the text. Every email attachment we have seen so far is slightly different, but there seem to be just two different malicious macros [1] [2] [pastebin] which download a component from one of the following locations:

Those servers are almost certainly entirely malicious, with IPs assigned to: (Relink Ltd, Russia) (Sysmedia, Russia)

This file is saved as %TEMP%\DOWUIAAFQTA.exe and has a VirusTotal detection rate of 4/49. Automated analysis tools [1] [2] [3] show attempted connections to: (TheFirst-RU, Russia) (Digital Ocean, US) (Portlane AB, Sweden) (Data Communication Business Group, Taiwan) (Private Layer Inc, Switzerland) (Telefonica Moviles Espana, Spain) (OVH / Simpace.com, UK)

According to this Malwr report it downloads the same Dridex DLL as seen in this spam run plus another variant of the downloader with a detection rate of 3/56.

Recommended blocklist:


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