Malware spam "Invoice-205611-49934798-CROSSHILL SF"

This fake financial spam has a malicious attachment. The sender's names, reference numbers and attachment names vary. Here is one example:

From:    Bertha Sherman
Date:    6 January 2016 at 09:29
Subject:    Invoice-205611-49934798-CROSSHILL SF

Dear Customer,

Please find attached Invoice 02276770 for your attention.

Should you have any Invoice related queries please do not hesitate to
contact either your designated Credit Controller or the Main Credit Dept. on
01635 279370.

For Pricing or other general enquiries please contact your local Sales Team.

Yours Faithfully,

Credit Dept'

I have seen at least four different attachments with names in a format similar to invoice40201976.doc (VirusTotal results [1] [2] [3] [4]). These Malwr reports [5] [6] [7] [8] show that the malware contained within POSTs to:

37.46.130.53/jasmin/authentication.php
179.60.144.21/jasmin/authentication.php
195.191.25.138/jasmin/authentication.php

Those reports also show communication to other suspect IPs, giving:

94.158.214.45 (Noviton Ltd , Russia)
78.47.119.93 (Hetzner, Germany)
2.61.168.116 (Sibirtelecom, Russia)
37.46.130.53 (JSC Server, Russia)
179.60.144.21 (Veraton Projects Ltd, Netherlands)
195.191.25.138 (Hostpro Ltd, Ukraine)

This Hybrid Analysis also shows similar characteristics.

The macro drops a file tsx3.exe with a detection rate of 7/55. The Malwr report doesn't give any particlar insight as to what this is, but it is likely to be a banking trojan or ransomware. UPDATE: this is Dridex (botnet 120 apparently), and thos the dropped file has been updated to this one.

There are two other similar spam campaigns at the same time [1] [2], one of which POSTs to a McHost.RU IP in Russia:

109.234.34.224/jasmin/authentication.php

MD5s (dropped EXE):
fdd95b4cc10b536934486c7d3fdee04f
613f5e4139e8006e9d47cb562450bc4a


MD5s (attachments):
06afdf7eaa3aa0d07b74c87c2c4bcede
11efa97e6091fa608596b463c9a20718
1574669aae13badc47b5c32927d22fb9
1988f8c864689bfd725e659e0815f032
27f891f6b0c0820492408022a860accc
37cc9d15f4eb5173e30ebff8ae6d44f6
37dd4e12541994d719d669ef7408b042
41faea2d8d7334a1e645cedf2a297344
42694176858ef65ababe87c8eee3679d
430eb4d6bc75b3743169aba0b5c368b9
5a5e5ac6d0e12215d79d2d321ac7a303
60cb6167675a908e9bba8957ece0947b
63abdef9d973b820f656642831ef6e07
7d190049c2354c18bd850d086d8c43c8
81697ef360e4abd09d96cd58bb1c7f01
82e06ae650e81e77879c5a33dba058b6
840b0d424b541d3649c33e8264632ba7
933f50bd87c02b67e122520022677aa6
a17b2fc61c64381ba5a2a154085ee6e7
a1958f55febde3b0fac15490f5e0ac6e
a43490f4c09e519d72296898343ab04f
ab41e3d7fa1e3d98a0bdec1e4086058a
b614c2f6f07620e53375c35efc692596
bc3142ce5e20814e98e582fa9b258501
cda4ba15eebc6ae3a9ab54610b38db04
d44c6490ab1c86adf9a99da1d173fc2f
d86f5160a0ea91bee70972e2bbf2c86d
e8bd65668d68410adacee9463eb1489e
ee70b032f96fb8f484019396aa130a55
ef4fd29b806675346661aec4907a14f7
f39fcd49bdbd7f100047594d8d7875b4
f65d8b3310f758c5d9c0f156d859125f
ff5f8da0f0d4c7e851dbf5c6d94fa0dc
Recommended blocklist:
94.158.214.45
78.47.119.93
2.61.168.116
37.46.130.53
179.60.144.21
195.191.25.138
109.234.34.224