Malware spam: "Budget report" leads to Locky (and also evil network on 23.95.106.128/25)

This fake financial spam leads to Locky ransomware:

From:    Lauri Gibbs
Date:    12 September 2016 at 15:11
Subject:    Budget report

Hi [redacted],

I have partially finished the last month's budget report you asked me to do. Please add miscellaneous expenses in the budget.


With many thanks,
Lauri Gibbs

Attached is a randomly-named ZIP file which in sample I saw contained two identical malicious scripts:

921FA0B8 Budget_report_xls - 1.js
921FA0B8 Budget_report_xls.js

The scripts are highly obfuscated however the Hybrid Analysis and Malwr report show that it downloads a component from:

lookbookinghotels.ws/a9sgrrak
trybttr.ws/h71qizc

These are hosted on a New Wave Netconnect IP at 23.95.106.223. This forms part of a block 23.95.106.128/25 which also contained Locky download locations at two other locations [1] [2] which rather makes me think that the whole range should be blocked.

A DLL is dropped with a detection rate of about 8/57 [3] [4] which appears to phone home to:

51.255.105.2/data/info.php (New wind Stanislav, Montenegro / OVH / France)
185.154.15.150/data/info.php [hostname: tyte.ru] (Dunaevskiy Denis Leonidovich, Russia / Zomro, Netherlands)
95.85.29.208/data/info.php [hostname: ilia909.myeasy.ru] (Digital Ocean, Netherlands)
46.173.214.95/data/info.php (Garant-Park-Internet Ltd, Russia)
91.214.71.101/data/info.php (ArtPlanet LLC, Russia)

Incidentally, the registrant information on the bad domains is also very familiar:

  Registry Registrant ID:
  Registrant Name: Dudenkov Denis
  Registrant Organization: Eranet International Limited
  Registrant Street: Lenina 18 Lenina 18
  Registrant City: Vladivostok
  Registrant State/Province: RU
  Registrant Postal Code: 690109
  Registrant Country: RU
  Registrant Phone: 85222190860
  Registrant Phone Ext:
  Registrant Fax:
  Registrant Fax Ext:
  Registrant Email: volosovik@inbox.ru
  Registry Admin ID:


Recommended minimum blocklist:
23.95.106.128/25
51.255.105.2
185.154.15.150
95.85.29.208
46.173.214.95
91.214.71.101

UPDATE - 2016/06/13

A list of the sites currently hosted on 23.95.106.128/25 and their SURBL ratings can be found here.