Goodbye Feodo, Hello Geodo!

As a response to a flood of fake e-invoices hitting Germany and Switzerland in January 2014, I’ve introduced Feodo Tracker, aimed to help Internet users protecting themselves from a sophisticated ebanking Trojan called Feodo (also known as Cridex/Bugat). Just a day after I published Feodo Tracker, the daily spam runs of fake invoices hitting German and Swiss internet users suddenly disappeared. Apparently, the distribution of new Feodo binaries stopped completely. After publishing Feodo Tracker, I have not seen any new Feodo infection binaries, neither for Version A nor Version B. In fact I haven’t managed to find any traces of Feodo ever since.

I don’t know what happened, nor do I know whether Feodo Tracker was the reason for the disappearance of Feodo. However, a few weeks ago – more than 3 months after Feodo disappeared – I started seeing a completely new malware popping up that I had never seen before. Investigating the new threat revealed botnet C&C traffic to obviously compromised hosts on port 8080 TCP which immediately reminded me of Feodo (Version A). The new threat is being distributed since late May 2014 through fake e-invoices, using compromised SMTP credentials. Below are a few screenshots of recent spam runs distributing this new threat.

Geodo Telekom Spam

Fake Deutsche Telekom invoices distributing Geodo (click to enlarge)


Geodo O2 Spam
Fake O2 invoices distributing Geodo (click to enlarge)


Geodo Vodafone spam
Fake Vodafone invoices distributing Geodo (click to enlarge)

The botnet infrastructure used by this new threat as well as the way the malware is being distributed raised my suspicion that it might be a successor of Feodo. Talking to other security experts in the community strengthened my suspicions: The new malware is built on completely different code than Feodo, but the crypto code used for the botnet C&C communication seems to be almost the same as that one used by Feodo. In addition, Geodo uses the same botnet C&C infrastructure and distribution mechanism as Feodo. More over, the new malware is aimed to commit ebanking fraud – just like Feodo. Hence I do believe that this new threat can be considered a direct successor of Feodo. Some security experts started to call this new threat Geodo. What is new with Geodo is the fact that it is not only using port 8080 TCP to communicate with the botnet C&C server but also port 7779 TCP.

As a response to this new development, I’ve extended Feodo Tracker’s capabilities so that it now keeps track of Geodo botnet C&C servers as well. Geodo botnet C&C servers detected by Feodo Tracker will be labelled as Version C:

Feodo Tracker tracking Geodo (Version C)

Feodo Tracker tracking Geodo (Version C)

Recent Geodo malware distribution URLs (spammed out though compromised SMTP credentials, all hijacked websites):

hXXp://gulik.biz/zakaz/2014_06_03rechnung_pdf_telekom
hXXp://autumnfeast.com/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://ptel148.org/tmp/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://webtasarim-tr.com/vlive/emoticons/2014_06_03rechnung_pdf_telekom
hXXp://fresnedaweb.com/plugins/2014_06_03rechnung_pdf_telekom
hXXp://mauriziokoch.com/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://neurochamps.com/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://fleischundwurstfreunde.de/2014_06_03rechnung_pdf_telekom
hXXp://chuyenthietkeweb.net/test/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://pharmacyforme.org/online_doc_pdf/2014_06_03rechnung_pdf_telekom
hXXp://vkrasnodar.com/tmp/install_4e1da2c196e62/telekomag
hXXp://polikarbonatcati.com/t3-assets/telekomag
hXXp://schoomity.com/ltd/telekomag
hXXp://hospitalreferralservices.com/tmp/telekomag
hXXp://aqua-term.com/tmp/telekomag
hXXp://ilendcomp.com/plugins/ltd/telekomag
hXXp://litelboss.com/ltd/telekomag
hXXp://thonglorcondo.com/wp-content/uploads/t-online
hXXp://seakayak-krabi.com/mail_info/t-online
hXXp://galilao.net/wp-content/uploads/t-online
hXXp://cddmaejai.com/modules/mod_araticlhess/t-online
hXXp://wangmun.go.th/modules/mod_araticlhess/t-online
hXXp://homeeco.pkru.ac.th/wp-content/uploads/t-online
hXXp://crit.occmednop.com/mail_info/t-online
hXXp://human.sru.ac.th/modules/mod_araticlhess/t-online
hXXp://baby.sanita.me/mail_info/t-online
hXXp://edltv.rvc.ac.th/images/t-online
hXXp://grey-ray.com/wp-content/uploads/t-online

Some recent Geodo malware samples (MD5 hash):

89366e485a798763e2b280baa49c0d21
53d327c9b7b977599a3f7da8113aaad4
ee1814e69b8f0197c8ef7cf8f1eab495
76851f69a99e848976f02571df947b12
1bb9db20d591bbdf599060f2b5a9e193
04d43b8735765b51a07fa8b7c3623803
febf73517923c933f9fc08f55235d70a
1a0e69d123d9a8a02caf7990a84b7008
f0459819bb9308ef504caa024be5858d
378a5183a7983bc4576314e28755ee02

Sample Geodo botnet C&C traffic (all HTTP POST to port 8080):

hXXp://94.76.218.166:8080/
hXXp://103.28.148.51:8080/
hXXp://122.155.3.6:8080/
hXXp://204.93.183.196:8080/
hXXp://192.154.110.228:8080/
hXXp://202.143.185.107:8080/

1 Response to “Goodbye Feodo, Hello Geodo!”


  • Hello,
    First of all thanks for your excellent work! It’s really helping us narrow down the problem…

    The thing is, one of these botnet C&C IPs is ours, and our whole system is dependant on that IP. We don’t know how this could have happened but, we are getting our site blocked to some of our clients, and it seems that the C&C for Geodo has been deployed inside our server.

    I myself, I’m a net sec. enthusiast so I think it would be a great opportunity to learn from if you could help us, or in any case give us any places to look/learn more from this kind of malware.

    Thanks a lot for your time and effort!

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