Malware spam: "Amount Payable" leads to Locky

This fake financial spam leads to Locky ransomware:

From:    Lynn Drake
Date:    15 December 2016 at 09:55
Subject:    Amount Payable

Dear [redacted],
The amount payable has come to $38.29. All details are in the attachment.
Please open the file when possible.


-
Best Regards,
Lynn Drake

The name of the sender will vary, although the dollar amount seems consistent in all the samples I have seen. Attached is a file with a name similar to doc_6937209.zip which contains an apparently randomly-named script in a format similar to ~_ZJR8WZ_~.js. The highly obfuscated script of one sample can be seen here. Typical detection rates for the script are around 16/54.

There are many different scripts, downloading a component from one of the following locations (thanks to my usual reliable source):

0668.com/k5bhgn
250sb.com./jynvmx
addwords.com.tr/aah6qmhv
anti-dust.ru/7k6cp
asdream.pl/gbbs1c
atio.li/exjik
bappeda.dharmasrayakab.go.id/dlhalychp
braindouble.com/uycx51ix
buhoutserts.ru/ufdazc6vv
casino-okinawa.com/ejguf
catherineduret.ch/5qpqi5ezp
chinaxw.org/xw1ju7y6zc
chungcuvinhomemydinh.com/6dvjasf
crolic88.myjino.ru/1ddig
demo.shispare.com/bvsjq
environment.ae/0od5hn
forbrent.com/h9kqgq
fyd123.cn/kib6h2d9ga
groupeelectrogeneservice.com/eefpeywf9z
hedefosgb.com/dpyzsb6u
hlonline.kentucky.com/i7z78
innercityarts.squaremdesign.com/dyo1w7
jianhu365.com/z9puqdj2eu
malamut.org/gizb2zq
obaloco.com.br/67mfj
peopleprofit.in/pyihdg
roman64.humlak.cz/7bnisgf
rulebraker.ru/zsw4cnf9o
scaune.qmagazin.ro/5hktu4h
slankmethode.nl/4zzq1am
subys.com/mjguriv80
szwanrong.com/x5qxzpjsi
tecnomundo.uy/a8rnlgzv
test1.giaiphaponline.org/0ytdjs1
test.sousouyo.com/feaetpnuee
theamericanwake.com/xw1ju7y6zc
travelinsider.com.au/mwaefb4b
trietlong.net/heyus
tx318.com/kqe4ca
ucbus.net/usdxqqt6
u-niwon.com/kmjg6j9ske
vaaren.dk/ogcz6ys0d
viscarci.com/wyqs6353
walkonwheels.net.au/qmd1uu
wdcd999.com/lm5z2snyqn
web-shuttle.in/eeo9oc
windshieldrepairvancouver.ca/qcp8k7
wiselysoft.com/qcymgbug7
wszystkodokuchni.pl/sl5yko7
wudiai.com/mc3hnwd
www.espansioneimmobiliare.com/akktnck
www.myboatplans.net/6d7ukeco6
wx.utaidu.com/1eybujbru
xlr8services.com/n970foumf
xn--k1affefe.xn--p1ai/8wzzjk24u
youspeak.pt/liowrtxs
yukngobrol.com/h7sfu
zhiyuw.com/qfbdcvrul
zwljfc.com/ld1pvjozu
zzzort10xtest123.com/nin5k3bwo

According to this Malwr analysis, a DLL is dropped with a detection rate of 18/55.  This Hybrid Analysis shows the Locky infection clearly and identifies some C2s, combining this with another source gives the following list of C2 servers:

86.110.117.155/checkupdate (Rustelekom, Russia)
185.129.148.56/checkupdate (MWTV, Latvia)
185.17.120.166/checkupdate (Rustelekom, Russia)

MWTV is a known bad host, so I recommend blocking the entire /24.

Recommended blocklist:
86.110.117.155
185.129.148.0/24
185.17.120.166