Trojan.Encoder.34049

Technical Information

To ensure autorun and distribution

Creates the following files on removable media

<Drive name for removable media>:\read me.txt
<Drive name for removable media>:\schema.rdf
<Drive name for removable media>:\samieee_obiee_presentation.pptx.redeem
<Drive name for removable media>:\stoc13_ml_quoc_le.pptx.redeem
<Drive name for removable media>:\indogerman2010.pptx.redeem
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx.redeem
<Drive name for removable media>:\roozenedowebinar.pptx.redeem
<Drive name for removable media>:\hypothyroidism_slides.pptx.redeem
<Drive name for removable media>:\waterresourcesag.pptx.redeem
<Drive name for removable media>:\asaprojectcompetition.pptx.redeem
<Drive name for removable media>:\20140114.rdf
<Drive name for removable media>:\proposaltemplates.ppt
<Drive name for removable media>:\bg_search_box.png
<Drive name for removable media>:\breakpoint.png
<Drive name for removable media>:\asm.png
<Drive name for removable media>:\dissolveanother.png
<Drive name for removable media>:\block.png
<Drive name for removable media>:\systisoft.pem
<Drive name for removable media>:\irgeek.pem
<Drive name for removable media>:\cert.pem
<Drive name for removable media>:\investmentbankca_ca8.pem
<Drive name for removable media>:\cleanlyrics.png
<Drive name for removable media>:\taxus_baccata.rdf
<Drive name for removable media>:\phytoremediation.rtf
<Drive name for removable media>:\passport_pal.wmv
<Drive name for removable media>:\military_callsigns_0311.rtf
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt
<Drive name for removable media>:\subjectclassification.zip
<Drive name for removable media>:\51.mp4
<Drive name for removable media>:\dualectls.pdf
<Drive name for removable media>:\flower_trans_matte.wmv
<Drive name for removable media>:\1sm_price.xls
<Drive name for removable media>:\pubnet_855.rtf
<Drive name for removable media>:\file1.ppt
<Drive name for removable media>:\pandp.rtf
<Drive name for removable media>:\samieee_obiee_presentation.pptx
<Drive name for removable media>:\applicant.xlsx
<Drive name for removable media>:\disclosuredetails.xlsx
<Drive name for removable media>:\price030215.xls
<Drive name for removable media>:\national_autism_preparation_programs.xlsx
<Drive name for removable media>:\cee_mmsprogram_summary_public.xlsx
<Drive name for removable media>:\2013_smccc_competition_points_jul2013.xlsx
<Drive name for removable media>:\parnas_01.jpg
<Drive name for removable media>:\fiche_inscription_2015.xls
<Drive name for removable media>:\subjectclassification.xls
<Drive name for removable media>:\calculatorworksheet.xls
<Drive name for removable media>:\tunpersonalca1.pem
<Drive name for removable media>:\firefly1.mov
<Drive name for removable media>:\ck_ugo.pem
<Drive name for removable media>:\168.jpg
<Drive name for removable media>:\contosoroot.cer.redeem
<Drive name for removable media>:\contoso.cer
<Drive name for removable media>:\contoso.cer.redeem
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\contoso_1.cer.redeem
<Drive name for removable media>:\sdkfailsafeemulator.cer
<Drive name for removable media>:\sdkfailsafeemulator.cer.redeem
<Drive name for removable media>:\contosoroot_1.cer
<Drive name for removable media>:\contosoroot_1.cer.redeem
<Drive name for removable media>:\contosoroot.cer
<Drive name for removable media>:\dashborder_192.bmp
<Drive name for removable media>:\dashborder_120.bmp
<Drive name for removable media>:\dashborder_120.bmp.redeem
<Drive name for removable media>:\dialmap.bmp
<Drive name for removable media>:\dialmap.bmp.redeem
<Drive name for removable media>:\toolbar.bmp
<Drive name for removable media>:\toolbar.bmp.redeem
<Drive name for removable media>:\correct.avi.redeem
<Drive name for removable media>:\join.avi.redeem
<Drive name for removable media>:\delete.avi.redeem
<Drive name for removable media>:\dashborder_192.bmp.redeem
<Drive name for removable media>:\testcertificate.cer.redeem
<Drive name for removable media>:\testcertificate.cer
<Drive name for removable media>:\sdksampleprivdeveloper.cer.redeem
<Drive name for removable media>:\210252809.jpg
<Drive name for removable media>:\parnas_01.jpeg
<Drive name for removable media>:\adhd_and_obesity.docx
<Drive name for removable media>:\4f0bf7ff71f28.jpeg
<Drive name for removable media>:\region-north-karelia.jpeg
<Drive name for removable media>:\api-hashmap.html
<Drive name for removable media>:\adadsi.html
<Drive name for removable media>:\about.html
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\tree_view.htm
<Drive name for removable media>:\advice_process.htm
<Drive name for removable media>:\about.htm
<Drive name for removable media>:\garden.htm
<Drive name for removable media>:\file_p_00000000_1371597592.docx
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx
<Drive name for removable media>:\applicantform_en.doc.redeem
<Drive name for removable media>:\cveuropeo.doc.redeem
<Drive name for removable media>:\fi51.doc.redeem
<Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.redeem
<Drive name for removable media>:\lisp_success.doc.redeem
<Drive name for removable media>:\sdksampleprivdeveloper.cer
<Drive name for removable media>:\delete.avi
<Drive name for removable media>:\highly_cited_2001.xlsx

Malicious functions

To complicate detection of its presence in the operating system,

deletes volume shadow copies.

Modifies file system

Creates the following files

%WINDIR%\programdata\conhost.exe
C:\read me.txt
D:\read me.txt
D:\install.log.redeem

Sets the 'hidden' attribute to the following files

%WINDIR%\programdata\conhost.exe

Modifies the following files

D:\install.log
<Drive name for removable media>:\toolbar.bmp
<Drive name for removable media>:\dialmap.bmp
<Drive name for removable media>:\dashborder_120.bmp
<Drive name for removable media>:\dashborder_192.bmp
<Drive name for removable media>:\contosoroot_1.cer
<Drive name for removable media>:\sdkfailsafeemulator.cer
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\contoso.cer
<Drive name for removable media>:\contosoroot.cer
<Drive name for removable media>:\testcertificate.cer
<Drive name for removable media>:\sdksampleprivdeveloper.cer
<Drive name for removable media>:\applicantform_en.doc
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx
<Drive name for removable media>:\file_p_00000000_1371597592.docx

Substitutes the following files

<Drive name for removable media>:\1kalmig2kb7fzp5tm1qbi
<Drive name for removable media>:\5wuz2a9nytavobjnu3fe1h0jxhqvwedr3jhz4ar2wk0k

Deletes itself.

Modifies user data files (Trojan.Encoder).

Changes user data files extensions (Trojan.Encoder).

Miscellaneous

Creates and executes the following

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

Executes the following

'%WINDIR%\syswow64\cmd.exe' /c vssadmin delete shadows /All /Quiet
'%WINDIR%\syswow64\cmd.exe' /c wevtutil clear-log Application
'%WINDIR%\syswow64\wevtutil.exe' clear-log Application
'%WINDIR%\syswow64\cmd.exe' /c wevtutil clear-log Security
'%WINDIR%\syswow64\wevtutil.exe' clear-log Security
'%WINDIR%\syswow64\cmd.exe' /c wevtutil clear-log Setup
'%WINDIR%\syswow64\wevtutil.exe' clear-log Setup
'%WINDIR%\syswow64\cmd.exe' /c wevtutil clear-log System
'%WINDIR%\syswow64\wevtutil.exe' clear-log System

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