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Thursday 24 March 2016

Malware spam: "FW: Payment Receipt" from multiple recipients leads to Locky

This fake financial spam comes from random recipients, for example:

From:    Marta Wood
Date:    24 March 2016 at 10:10
Subject:    FW: Payment Receipt

Dear [redacted],

Thank you for your payment. It is important that you print this receipt and record the receipt number as proof of your payment.
You may be asked to provide your receipt details should you have an enquiry regarding this payment.

Regards,
Marta Wood
Technical Manager - General Insurance

Attached is a ZIP file that incorporates the recipients name plus a word such as payment, details or receipt plus a random number. This achive contains a randomly-named script (starting with "PM") and ending with .js.js plus which appear to be a set of hidden .BIN files which may well be junk.

VirusTotal detection rates for the scripts are fairly low (examples [1] [2] [3] [4] [5] [6]). Automated analysis [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] shows binary download locations at:

stie.pbsoedirman.com/msh4uys
projectpass.org/o3isua
natstoilet.com/l2ps0sa [404]
yourhappyjourney.com/asl2sd [404]


Two of locations are 404ing, the two that work serve up a different binary each. There are probably many more download locations and more binaries, I will try to add a list later.

The VirusTotal results for the binaries [19] [20] indicate that this is ransomware, specifically is it Locky. Automated analyses [21] [22] [23] [24] [25] [26] show it phoning home to:

195.123.209.123 (ITL, Latvia)
107.181.187.228 (Total Server Solutions, US)
217.12.218.158 (ITL, Netherlands)
46.8.44.39 (PE Dunaeivskyi Denys Leonidovich, Ukraine)


UPDATE

Some further download locations from another source (thank you!):

byprez.com/oeepsl3s
caidongrong.com/e5owzc
emprendamosjuntos.com/dk3oas
epicld.com/n3sjax
fallrunathon.com/pw9eoa
famouscouponcodes.com/nxj3sa
hudesign.com/k39skad
kanberdemir.com/b5uas
mqhchurch.net/k2usy
mskphilly.org/yt7wei
optionstrategiesinsiders.org/zpq9sa
plexcera.com/m4uxj2
tigabersaudara.com/k3isa
www.naturseife-gartetal.de/oe9fja


MD5s for downloaded binaries:

0b0f29dc216e481659e84efc349823e1
0bd4f9b53991e86e39945559be074f40
2aea58b3328728ee5f0117112f8d8bd1
3da8d515085dc46be0c5e8d0aa959a5d
8630de2e42fb8e26764a994a4b7c65a9
8b07f6a6b52462395ed8dc91c4b7e7e6
8b6bc36cf0fc6db4fe7f2257cdc75905
9b52fbfe6d763bdbd9156b308ce4cd9f
9ebc25f1e53a2174213ea128a3cdb166
ab7c78cbd32ca79dff83f00aec693b2c
c070835d983f162b48f4fc370e30cf02
c9be9e7751b8f164d04a31a71d0199c6
f5d668c551cecb12f6404214fb0c8251



Recommended blocklist:
195.123.209.123
107.181.187.228
217.12.218.158
46.8.44.39

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