2017-07-25 TrickBot "< No Subject >"

2017-07-25 #trickBot email phishing campaign "< No Subject >"
Samples: 458

Email sample:
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From: <notifications@in.telstra.com.au>
To: [REDACTED]
Subject: < No Subject >
Date: Wed, 26 Jul 2017 01:57:26 +0300

Good Day,

Please see attached email bill request from May-July 2017.

Yours Sincerely,
Sandy
D354810

Attachment: May-July2017.zip
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- sender is "notifications@in.telstra.com.au"
- subject is "< No Subject >"
- attached file "May-July2017.zip" contains file "<3 upcase letters>_ <11 digits>_<6 digits>.wsf", a which when executed will downaload 2nd stage downloader from:

Stage2 download sites:
http://acomplia.orgfree.com/8?
http://delicefilm.com/cgi-bin/10?
http://dodawanie.com/1?
http://esu-tech-saar.de/4?
http://gala.noads.biz/2?
http://huairou.com/3?
http://kpalion.piwko.pl/12?
http://mavisehirrotaract.org/cgi-bin/5?
http://naturis.info/6?

Stage2 downloader is a MSHTA file containing VBScript downloader which will download malware from:

Malware download sites:
http://1pointsix18.in/n3f7b
http://eselink.com.my/n3f7b
http://gotchawildlife.com/n3f7b
http://infopoupees.com/n3f7b
http://olsonlamaj.com/n3f7b
http://potsdamer-strassenfest.de/n3f7b
http://rencontre-rouen.com/n3f7b
http://sakrabeskydy.wz.cz/n3f7b
http://starsafety.net/n3f7b
http://sunbrio.com/n3f7b
http://thelaw.ae/n3f7b
http://trominguatedrop.org/af/n3f7b
http://wirbeldipf.ch/n3f7b

Malware:
- encoded on download SHA256 932cc394f05ae536e98b9861bfc854251023809ae8099f2cb6af16c28f6300bd, MD5 e0aee94076700e1bcb6b9eac6121a9bb
- decode by XORing with "ur43vUVcQMub86bdFOwgt1rZJjssOXNj"
- decoded SHA256 b7a7d715f370142ddc6d1ba15f9f7377cda3995d4726874d4eeda24d4b9eff13, MD5 90284b01fae8a932ca99767825568721
- VT: https://www.virustotal.com/file/b7a7d715f370142ddc6d1ba15f9f7377cda3995d4726874d4eeda24d4b9eff13/analysis/1501024947/
- HA: https://www.reverse.it/sample/b7a7d715f370142ddc6d1ba15f9f7377cda3995d4726874d4eeda24d4b9eff13?environmentId=100