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Tuesday 25 October 2016

Malware spam: "Blank / Document / File / Image / img / IMG / Pic / Picture / Scan Data" leads to Locky

Perhaps minimalist spam works better, there is currently a Locky spam run with on of the subjects Blank / Document / File / Image / img / IMG / Pic / Picture / Scan Data plus a number (e.g. "Picture 4") with a ZIP file attached matching the subject (e.g. Picture 4.zip) which in turn contains a malicious Javascript that looks like this [pastebin]. There is no body text.

These automated analyses [1] [2] [3] [4] show that it is Locky. My usual sources tell me that the various scripts download from one of the following locations:

abplhomes.com/g76dbf
alyatater.com/g76dbf
baedalapp.com/g76dbf
beaumontschool.com/g76dbf
blastspraypolish.com/g76dbf
codefinder.co/g76dbf
copperfilters.com/g76dbf
cultural-ecology.com/g76dbf
designera.org/g76dbf
dev.indonesiatextile.id/g76dbf
dwimultimakmur.com/g76dbf
dziennikarze.lo-kolaczyce.pl/g76dbf
easytravelvault.com/g76dbf
elitednadt.com/g76dbf
emreker.com/g76dbf
faisal-ibrahim.info/g76dbf
fpi-canada.com/g76dbf
fresflor.net/g76dbf
gellyrepin.com/g76dbf
himytutor.com/g76dbf
informing.asia/g76dbf
jciindia.in/g76dbf
kantoor.vescolub.nl/g76dbf
kendalpos.com/g76dbf
lamurindo.com/g76dbf
lilxtreme.com/g76dbf
lookbeauty.ir/g76dbf
mahendradesai.net/g76dbf
newdesign.well.pk/g76dbf
nitrogenwebs.com/g76dbf
panaceapeople.com/g76dbf
permars.com/g76dbf
privatestashstorage.com/g76dbf
promo.worldloft.ru/g76dbf
read4change.com/g76dbf
runmyaccounts.ch/g76dbf
rws1.com.au/g76dbf
samuderaciptaraya.com/g76dbf
sendat.vn/g76dbf
shopro.ir/g76dbf
srcc.co.th/g76dbf
swissmades.com/g76dbf
tacunair.com/g76dbf
tciislandguide.com/g76dbf
uatsa.cl/g76dbf
vicampro.com/g76dbf
web.justproductions.co.uk/g76dbf
wivebeday.com/g76dbf
www.fireballindia.com/g76dbf
www.jockytours.com/g76dbf
www.pb2bb2c.com/g76dbf
www.pharmaciela.com/g76dbf

The URL is appended with a random query string, e.g. ?EsIemTBBP=LHvybwFTeh

A malicious DLL is dropped with an MD5 of 7a131fff8eaf144312494988300d7dc1 and a detection rate of 4/56. The malware then phones home to one of the following locations:

185.127.27.100/linuxsucks.php [hostname: artem.kotyuzhanskiy.example.com] (JSC "Informtehtrans", Russia)
91.200.14.124/linuxsucks.php [hostname: artem.kotyuzhanskiy.example.com] (SKS-Lugan / VHoster, Ukraine)
77.123.137.221/linuxsucks.php (Volia DataCentre, Ukraine)


The malware also attempts to contact the following locations, all of which seem to be inactive:

mehksltbkd.info/linuxsucks.php
wugijvpctg.click/linuxsucks.php
svyegag.su/linuxsucks.php
fvhnnhggmck.ru/linuxsucks.php
tdlqkewyjwakpru.ru/linuxsucks.php
tnhtfmoglsjarf.work/linuxsucks.php
bhfcyqagglplpt.info/linuxsucks.php
yxlpkrhhkbyhrn.work/linuxsucks.php
fhbllecpavbrxlvci.org/linuxsucks.php
krtwpukq.su/linuxsucks.php
yptehqhsgdvwsxc.biz/linuxsucks.php
otcnomgbqko.work/linuxsucks.php

Recommended blocklist:
185.127.27.100
91.200.14.124
77.123.137.221

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