Trojan.Encoder.34228

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'services.exe' = '"%APPDATA%\Microsoft\Windows\services.exe" -start'

Creates the following files on removable media

<Drive name for removable media>:\!!! all your files are encrypted !!!.txt
<Drive name for removable media>:\sioc.rdf
<Drive name for removable media>:\schema.rdf
<Drive name for removable media>:\contenttypes.rdf
<Drive name for removable media>:\samieee_obiee_presentation.pptx
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx
<Drive name for removable media>:\stoc13_ml_quoc_le.pptx
<Drive name for removable media>:\indogerman2010.pptx
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt
<Drive name for removable media>:\metac.ppt
<Drive name for removable media>:\ksearch_esa_talk.ppt
<Drive name for removable media>:\accountsreceivable.ppt
<Drive name for removable media>:\arrow-down.png
<Drive name for removable media>:\asm.png
<Drive name for removable media>:\bg_search_box.png
<Drive name for removable media>:\calibre.png
<Drive name for removable media>:\dissolveanother.png
<Drive name for removable media>:\tunpersonalca1.pem
<Drive name for removable media>:\ck.pem
<Drive name for removable media>:\delongcacert.pem
<Drive name for removable media>:\cert.pem
<Drive name for removable media>:\investmentbankca_ca8.pem
<Drive name for removable media>:\elvisimp.rdf
<Drive name for removable media>:\swc_2009-03-02.rdf
<Drive name for removable media>:\price.zip
<Drive name for removable media>:\router_manual.rtf
<Drive name for removable media>:\1sm_price.zip
<Drive name for removable media>:\fiche_inscription_2015.zip
<Drive name for removable media>:\excel_example.zip
<Drive name for removable media>:\national_autism_preparation_programs.xlsx
<Drive name for removable media>:\trtf_matrix2012_oct.xlsx
<Drive name for removable media>:\2013_smccc_competition_points_jul2013.xlsx
<Drive name for removable media>:\highly_cited_2001.xlsx
<Drive name for removable media>:\cee_mmsprogram_summary_public.xlsx
<Drive name for removable media>:\disclosuredetails.xlsx
<Drive name for removable media>:\excel_example.xls
<Drive name for removable media>:\calculatorworksheet.xls
<Drive name for removable media>:\productos.xls
<Drive name for removable media>:\babyboymaintoscenesbackground.wmv
<Drive name for removable media>:\flower_trans_matte.wmv
<Drive name for removable media>:\babyboymaintoscenesbackground_pal.wmv
<Drive name for removable media>:\babyboymaintonotesbackground_pal.wmv
<Drive name for removable media>:\passport_pal.wmv
<Drive name for removable media>:\military_callsigns_0311.rtf
<Drive name for removable media>:\pubnet_855.rtf
<Drive name for removable media>:\static_electricity_easy_and_quick_activities.rtf
<Drive name for removable media>:\pandp.rtf
<Drive name for removable media>:\ck_ugo.pem
<Drive name for removable media>:\20140114.rdf
<Drive name for removable media>:\ff_ot_user_guide.pdf
<Drive name for removable media>:\ituneshelpunavailable.htm
<Drive name for removable media>:\trivial-merge.htm
<Drive name for removable media>:\wrar520.exe
<Drive name for removable media>:\chromesetup.exe
<Drive name for removable media>:\calc.exe
<Drive name for removable media>:\skypesetup.exe
<Drive name for removable media>:\dotnetfx45_full_setup.exe
<Drive name for removable media>:\notepad.exe
<Drive name for removable media>:\sdszfo.docx
<Drive name for removable media>:\hadac_newsletter_july_2010_final.docx
<Drive name for removable media>:\nwfieldnotes1966.docx
<Drive name for removable media>:\lisp_success.doc
<Drive name for removable media>:\cveuropeo.doc
<Drive name for removable media>:\hanni_umami_chapter.doc
<Drive name for removable media>:\508softwareandos.doc
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\sdkfailsafeemulator.cer
<Drive name for removable media>:\contosoroot.cer
<Drive name for removable media>:\dashborder_96.bmp
<Drive name for removable media>:\coffee.bmp
<Drive name for removable media>:\correct.avi
<Drive name for removable media>:\join.avi
<Drive name for removable media>:\64bit_notes.htm
<Drive name for removable media>:\advice_process.htm
<Drive name for removable media>:\spib_pima.pdf
<Drive name for removable media>:\iisstart.htm
<Drive name for removable media>:\2015-02-patients-topic-work-related-asthma-jobs.pdf
<Drive name for removable media>:\lom602.pdf
<Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4
<Drive name for removable media>:\video_1.mp4
<Drive name for removable media>:\clip_480_5sec_6mbps_h264.mp4
<Drive name for removable media>:\etc6_m_1.mov
<Drive name for removable media>:\scan.mov
<Drive name for removable media>:\spanner.mov
<Drive name for removable media>:\dag2_panel1_320_ref.mov
<Drive name for removable media>:\3.jpg
<Drive name for removable media>:\4f0bf7ff71f28.jpg
<Drive name for removable media>:\pushkin.jpg
<Drive name for removable media>:\2.jpg
<Drive name for removable media>:\parnas_01.jpeg
<Drive name for removable media>:\3.jpeg
<Drive name for removable media>:\4f0bf7ff71f28.jpeg
<Drive name for removable media>:\pushkin.jpeg
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\browse.html
<Drive name for removable media>:\trivial-merge.html
<Drive name for removable media>:\about.html
<Drive name for removable media>:\7790_preview.pdf
<Drive name for removable media>:\calculatorworksheet.zip

Malicious functions

To complicate detection of its presence in the operating system,

deletes volume shadow copies.

Injects code into

the following system processes:

%WINDIR%\syswow64\notepad.exe

Modifies file system

Creates the following files

%TEMP%\05f5bf5f.zeppelin
%APPDATA%\microsoft\windows\services.exe
%TEMP%\edb7477f.zeppelin
%TEMP%\~temp001.bat
D:\$recycle.bin\.zeppelin
D:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\.zeppelin
D:\!!! all your files are encrypted !!!.txt
D:\$recycle.bin\!!! all your files are encrypted !!!.txt
D:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\!!! all your files are encrypted !!!.txt
C:\$recycle.bin\.zeppelin
C:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\.zeppelin

Deletes the following files

%TEMP%\05f5bf5f.zeppelin
%TEMP%\edb7477f.zeppelin

Modifies the following files

<Drive name for removable media>:\join.avi
<Drive name for removable media>:\correct.avi
<Drive name for removable media>:\coffee.bmp
<Drive name for removable media>:\dashborder_96.bmp
<Drive name for removable media>:\contosoroot.cer
<Drive name for removable media>:\sdkfailsafeemulator.cer
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\508softwareandos.doc
<Drive name for removable media>:\hanni_umami_chapter.doc
<Drive name for removable media>:\cveuropeo.doc
<Drive name for removable media>:\lisp_success.doc
<Drive name for removable media>:\indogerman2010.pptx
<Drive name for removable media>:\stoc13_ml_quoc_le.pptx
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx
<Drive name for removable media>:\samieee_obiee_presentation.pptx

Deletes itself.

Modifies user data files (Trojan.Encoder).

Network activity

Connects to

'ge###tool.com':80
'ge###tool.com':443
'ip###ger.org':80
'ip###ger.org':443
'oc##.#ectigo.com':80

TCP

Other

'ge###tool.com':443
'ip###ger.org':443

UDP

DNS ASK ge###tool.com
DNS ASK ge###tatool.com
DNS ASK ip###ger.org
DNS ASK oc##.#ectigo.com

Miscellaneous

Creates and executes the following

'%APPDATA%\microsoft\windows\services.exe' -start
'%APPDATA%\microsoft\windows\services.exe' -agent 0
'%APPDATA%\microsoft\windows\services.exe' -agent 1
'%APPDATA%\microsoft\windows\services.exe' -agent 2
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C %TEMP%\~temp001.bat' (with hidden window)

Executes the following

'%WINDIR%\syswow64\notepad.exe'
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet
'%WINDIR%\syswow64\cmd.exe' /C %TEMP%\~temp001.bat

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