Trojan.Encoder.10826

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '{36FBFA1A-D06F-DD59-149A-8B9D18671D32}' = '%ALLUSERSPROFILE%\{AAEBD22A-F85F-4149-149A-8B9D18671D32}\075402b5.exe'

Creates or modifies the following files

<SYSTEM32>\tasks\{36fbfa1a-d06f-dd59-149a-8b9d18671d32}

Creates the following files on removable media

<Drive name for removable media>:\{1ae78717-a934-f82e-bb75-5330e2af5ce8}\8ad0c29c-3f20-9a18-0766-fe9e8c1ac147.exe
<Drive name for removable media>:\waterresourcesag.pptx.lnk
<Drive name for removable media>:\sim_gametheory_to_finance.ppt.lnk
<Drive name for removable media>:\mappingconcepthubberlin.ppt.lnk
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt.lnk
<Drive name for removable media>:\proposaltemplates.ppt.lnk
<Drive name for removable media>:\cbz.png.lnk
<Drive name for removable media>:\arrow-down.png.lnk
<Drive name for removable media>:\breakpoint.png.lnk
<Drive name for removable media>:\calibre.png.lnk
<Drive name for removable media>:\asm.png.lnk
<Drive name for removable media>:\samieee_obiee_presentation.pptx.lnk
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx.lnk
<Drive name for removable media>:\systisoft.pem.lnk
<Drive name for removable media>:\irgeek.pem.lnk
<Drive name for removable media>:\lom602.pdf.lnk
<Drive name for removable media>:\2015-02-worms-nanoparticle-toxicity.pdf.lnk
<Drive name for removable media>:\ff_ot_user_guide.pdf.lnk
<Drive name for removable media>:\video_1.mp4.lnk
<Drive name for removable media>:\video.mp4.lnk
<Drive name for removable media>:\spanner.mov.lnk
<Drive name for removable media>:\dag2_panel1_320_ref.mov.lnk
<Drive name for removable media>:\firefly1.mov.lnk
<Drive name for removable media>:\ck.pem.lnk
<Drive name for removable media>:\winmine.exe.lnk
<Drive name for removable media>:\hypothyroidism_slides.pptx.lnk
<Drive name for removable media>:\1sm_price.zip.lnk
<Drive name for removable media>:\price.zip.lnk
<Drive name for removable media>:\fiche_inscription_2015.zip.lnk
<Drive name for removable media>:\al.xlsx.lnk
<Drive name for removable media>:\trtf_matrix2012_oct.xlsx.lnk
<Drive name for removable media>:\suspendedcompanies.xlsx.lnk
<Drive name for removable media>:\removedtitles_records.xls.lnk
<Drive name for removable media>:\fiche_inscription_2015.xls.lnk
<Drive name for removable media>:\contractualdeadlines.xls.lnk
<Drive name for removable media>:\productos.xls.lnk
<Drive name for removable media>:\calculatorworksheet.xls.lnk
<Drive name for removable media>:\testwmv.wmv.lnk
<Drive name for removable media>:\babyboymaintonotesbackground_pal.wmv.lnk
<Drive name for removable media>:\phytoremediation.rtf.lnk
<Drive name for removable media>:\waterlandhealthkano.rtf.lnk
<Drive name for removable media>:\fungalnameauthors.rtf.lnk
<Drive name for removable media>:\digest.rdf.lnk
<Drive name for removable media>:\schema.rdf.lnk
<Drive name for removable media>:\contenttypes.rdf.lnk
<Drive name for removable media>:\skos.rdf.lnk
<Drive name for removable media>:\20140114.rdf.lnk
<Drive name for removable media>:\elvisimp.rdf.lnk
<Drive name for removable media>:\taxus_baccata.rdf.lnk
<Drive name for removable media>:\210252809.jpg.lnk
<Drive name for removable media>:\server.pem.lnk
<Drive name for removable media>:\168.jpg.lnk
<Drive name for removable media>:\3.jpg.lnk
<Drive name for removable media>:\13.jpg.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\holycrosschurchinstructions.docx.lnk
<Drive name for removable media>:\nwfieldnotes1966.docx.lnk
<Drive name for removable media>:\aoc_saq_d_v3_merchant.docx.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
<Drive name for removable media>:\hanni_umami_chapter.doc.lnk
<Drive name for removable media>:\testee.cer.lnk
<Drive name for removable media>:\contosoroot_1.cer.lnk
<Drive name for removable media>:\sdkfailsafeemulator.cer.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\sdksampleunprivdeveloper.cer.lnk
<Drive name for removable media>:\wrar520.exe.lnk
<Drive name for removable media>:\dashborder_120.bmp.lnk
<Drive name for removable media>:\coffee.bmp.lnk
<Drive name for removable media>:\tileimage.bmp.lnk
<Drive name for removable media>:\dial.bmp.lnk
<Drive name for removable media>:\toolbar.bmp.lnk
<Drive name for removable media>:\dashborder_192.bmp.lnk
<Drive name for removable media>:\dashborder_144.bmp.lnk
<Drive name for removable media>:\split.avi.lnk
<Drive name for removable media>:\correct.avi.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\productos.zip.lnk
<Drive name for removable media>:\swc_2009-03-02.rdf.lnk
<Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe.lnk
<Drive name for removable media>:\utorrent.exe.lnk
<Drive name for removable media>:\sdszfo.docx.lnk
<Drive name for removable media>:\region-north-karelia.jpg.lnk
<Drive name for removable media>:\2.jpg.lnk
<Drive name for removable media>:\4f0bf7ff71f28.jpeg.lnk
<Drive name for removable media>:\210252809.jpeg.lnk
<Drive name for removable media>:\pushkin.jpeg.lnk
<Drive name for removable media>:\168.jpeg.lnk
<Drive name for removable media>:\1189.jpeg.lnk
<Drive name for removable media>:\about.html.lnk
<Drive name for removable media>:\howto-index.html.lnk
<Drive name for removable media>:\trivial-merge.html.lnk
<Drive name for removable media>:\adadsi.html.lnk
<Drive name for removable media>:\iisstart.html.lnk
<Drive name for removable media>:\tree_view.html.lnk
<Drive name for removable media>:\alert.html.lnk
<Drive name for removable media>:\ituneshelpunavailable.html.lnk
<Drive name for removable media>:\about.htm.lnk
<Drive name for removable media>:\browse.htm.lnk
<Drive name for removable media>:\64bit_notes.htm.lnk
<Drive name for removable media>:\iisstart.htm.lnk
<Drive name for removable media>:\tree_view.htm.lnk
<Drive name for removable media>:\garden.htm.lnk
<Drive name for removable media>:\trivial-merge.htm.lnk
<Drive name for removable media>:\notepad.exe.lnk
<Drive name for removable media>:\price030215.zip.lnk

Malicious functions

Injects code into

the following system processes:

%WINDIR%\syswow64\svchost.exe

the following user processes:

iexplore.exe

Modifies file system

Creates the following files

%ALLUSERSPROFILE%\{aaebd22a-f85f-4149-149a-8b9d18671d32}\075402b5.exe

Deletes the following files

<Drive name for removable media>:\{1ae78717-a934-f82e-bb75-5330e2af5ce8}\8ad0c29c-3f20-9a18-0766-fe9e8c1ac147.exe

Substitutes the following files

<Drive name for removable media>:\{1ae78717-a934-f82e-bb75-5330e2af5ce8}\8ad0c29c-3f20-9a18-0766-fe9e8c1ac147.exe

Deletes itself.

Miscellaneous

Creates and executes the following

'<Full path to file>' ' (with hidden window)
'%WINDIR%\syswow64\svchost.exe' ' (with hidden window)

Executes the following

'%WINDIR%\syswow64\svchost.exe'

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