Malware spam: "Invoice 123456" from random sender in victim's own domain

This fake financial spam appears to come from a random sender in the victim's own domain, but this is just a simple forgery. The payload is Locky ransomware.

Subject:     Invoice 5639438
From:     random sender (random.sender@victimdomain.tld)
Date:     Tuesday, 22 November 2016, 8:43

Attached is the document 'Invoice 5639438'.

The reference number varies from email to email, but is consistent in the subject, body and the name of the attachment (e.g. Invoice 5639438.zip). This ZIP file contains a malicious WSF script (e.g. Invoice 7868933153.wsf) that looks like this.

According the the Malwr analysis, that script downloads from:

manage.parafx.com/98y4h?AdIXigNCmu=UdJVux

There are no doubt many other locations. That same analysis shows a DLL being dropped with an MD5 of de5d8250edf98262f335cd87fe6f6740 and a detection rate of 9/56. The Hybrid Analysis of the same sample shows the malware contacting the following C2 locations:

89.108.73.124/information.cgi (Agava, Russia)
91.211.119.98/information.cgi (Zharkov Mukola Mukolayovuch aka 0x2a.com.ua, Ukraine)
94.242.55.81/information.cgi (RNet, Russia)

Recommended blocklist:
89.108.73.0/24
91.211.119.98
94.242.55.81

UPDATE

My usual reliable source came up with these additional download locations:

adoptshawm.net/98y4h
hotelmm.ro/98y4h
houseller.eu/98y4h
huaphoto.net/98y4h
huduanjichuang.com/98y4h
i12.ir/98y4h
ifsaiumumi.com/98y4h
illinoisnavhda.org/98y4h
inkubator.biz.pl/98y4h
interdean.hu/98y4h
iphoneservices.com.ua/98y4h
iran-bazaar.ir/98y4h
irandivinggroup.com/98y4h
islandspirits.ca/98y4h
izww.cn/98y4h
jain4jain.com/98y4h
jaydeepuk.com/98y4h
jazz.kvalitne.cz/98y4h
jinqiaonkyy.com/98y4h
jkshea.com/98y4h
joesrv.com/98y4h
joplinglobeonline.com/98y4h
junhao8.com/98y4h
justsport.co.il/98y4h
kabele.ru/98y4h
klaxcar.ro/98y4h
kongkhak.go.th/98y4h
korbastudio.com/98y4h
krepiec.pl/98y4h
kstm.or.th/98y4h
kuponik.eu/98y4h
lanphuong.vn/98y4h
lesmouf.com/98y4h
lhesh.com/98y4h
lifanpower.pl/98y4h
lomtalay.com/98y4h
lp511.com/98y4h
ltinvest.de/98y4h
luanasahian.ro/98y4h
lumitech.ro/98y4h
manage.parafx.com/98y4h
maroeg.com/98y4h
maxifitness.ru/98y4h
mckains.net/98y4h
mediawax.be/98y4h
megalingeriemall.com/98y4h
melzer-casting.de/98y4h
microsupport.net/98y4h
militarydirect.com/98y4h
minmin.in/98y4h
mirokon30.ru/98y4h
mooymedia.nl/98y4h
morgoo.es/98y4h
mudrahviezda.sk/98y4h
mybankofgold.com/98y4h
mysolosource.com/98y4h
natalija.ru/98y4h
reoilmaya.com/98y4h