Threat Level: green Handler on Duty: Didier Stevens

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Massive malware spam campain to corporate domains in Colombia

Published: 2015-05-01
Last Updated: 2015-05-01 18:46:28 UTC
by Manuel Humberto Santander Pelaez (Version: 1)
6 comment(s)

There was a massive malware spam campain directed to corporate domains in Colombia. The following was the e-mail received:

ACH spam e-mail

Now this e-mail has two interesting aspects:

  • It is tracking if the user reads the message using the google analytics API by invoking the following:
    img src=3Dhttp://www.google-analytics.com/c=
    ollect?v=3D1&tid=3DUA-62115737-1&cid=3Dxx@xx.com&t=3De=
    vent&ec=3Dxx@xx.com&ea=3Dopens&el=3Dxx@xx.com&cs=3Dnewsletter&cm=3Demail&cn=3D062413&cm1=3D1?/
    
  • It has a link to a dropbox file being masqueraded with the google url redirection script:
    https://www.google.com/url?q=3Dhttps%3A%2F%=
    2Fwww.dropbox.com%2Fs%2Fvs5hho625v7ibw5%2FACH=5Ftransaction5721.doc%3Fdl%3D=
    1&sa=3DD&sntz=3D1&usg=3DAFQjCNFADf1fsGqdWqwSOnMC6XyLMHrL2w

When opened, this document has embedded a visual basic script that downloads a known trojan password stealer designed for colombian banks.

This domain uses a private registation service, avoiding to know the identity of the registrar:

frterminales private registration

Be careful when opening unknown e-mails. You could be leaking information and compromising your computer, even when you see google domain in the URLs.

Manuel Humberto Santander Peláez
SANS Internet Storm Center - Handler
Twitter: @manuelsantander
Web:http://manuel.santander.name
e-mail: msantand at isc dot sans dot org

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6 comment(s)
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