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Wednesday 8 July 2015

Malware spam: "Strange bank account operation" / "Unauthorised bank account activity" / "Illegal bank account transfer" etc

This fake financial spam comes with a malicious payload. It appears to be randomly generated in part, here are some examples:
Date:    8 July 2015 at 18:02
Subject:    Strange bank account operation

Kindly be informed that bank did noticed suspect attempt of money withdrawal relating to Your debit card.
Please find enclosed bank e-mail sent by financial department on Monday.
As well attached are security details for Your review.
Michael Morgan
Senior Manager

==========

Date:    1 January 1970 at 00:00
Subject:    Suspicious bank account operation

Kindly be acknowledged that bank had found unauthorised attempt of amounts withdrawal from Your credit card.
Please find enclosed bank warning provided by bank manager earlier.
Also enclosed are security details for Your affirmation.
Robin Owen
Chief accountant

==========

Date:    8 July 2015 at 17:59
Subject:    Illegal bank account transfer

Kindly be informed that bank security department has found illegal attempt of money withdrawal from Your Mastercard account.
Please check the enclosed bank publication provided by banking department today.
As well attached are security details for Your approval.
Clive Adams
Tax Consultant

=========

Date:    8 July 2015 at 16:55
Subject:    Strange bank account transfer

Kindly note that bank did noticed suspect attempt of amounts withdrawal related to Your Mastercard.
Please examine the enclosed bank statement sent by manager on Monday.
Furthermore attached are personal details for Your confirmation.
Martin Morgan
Tax authority

==========

Date:    8 July 2015 at 17:51
Subject:    Unauthorised bank account activity

Kindly be acknowledged that bank security department had detected suspect attempt of money withdrawal related to Your debit card.
Please check the enclosed bank statement forwarded by banking department today.
In addition attached are security details for Your control.
Robin Willis
Senior Manager

Attached is a Word document [VT 6/55]with various filenames:

extract_of_bank_document.doc
fragment_of_bank_fax.doc
original_of_bank_report.doc
scan-copy_of_bank_document.doc
transcript_of_bank_statement.doc


All the samples I have seen have an identical document with different names, containing this malicious macro which then goes off and downloads various other components according to the Hybrid Analysis report, using the following URLs:

midwestlabradoodle.com/wp-content/plugins/really-simple-captcha/6727156315273.txt
artyouneed.com/wp-includes/theme-compat/6727156315273.txt
artyouneed.com/wp-includes/theme-compat/kaka.txt

These appear to download as a set of malicious scripts [1] [2] [3] which then download a further component from:

bluemagicwarranty.com/wp-includes/theme-compat/getrichtoday.exe

This binary has a detection rate of 3/55. The Malwr report shows that it drops two other files, named as Zlatowef.exe [VT 3/55] and redtytme4.exe [VT 9/55] and it also downloads components from:

38.65.142.12:12551/ON12/HOME/0/51-SP3/0/ELHBEDIBEHGBEHK
38.65.142.12:12551/ON12/HOME/41/5/4/ELHBEDIBEHGBEHK


That IP is allocated to Cogent Communications in Mexico. The download is Upatre which means that the payload is almost definitely the Dyre banking trojan, even though the delivery mechanism of a Word document is unusual for Dyre.

Recommended blocklist:
38.65.142.12
midwestlabradoodle.com
artyouneed.com
bluemagicwarranty.com

MD5s:
8d547f5ef829d9033c3eb5d4ce1602c1
5cff4106fd4c393f4b935e8e97277351
21023e02a33ec1d924f489378d1f01d5
e8f2c4845008d3064948ed336c1a9852




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