Trojan.Encoder.39151

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'smss.exe' = '"%APPDATA%\Microsoft\Windows\smss.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>:\delongcacert.pem
<Drive name for removable media>:\hhhlcert.pem
<Drive name for removable media>:\ck_ugo.pem
<Drive name for removable media>:\lom602.pdf
<Drive name for removable media>:\ff_ot_user_guide.pdf
<Drive name for removable media>:\fil_20060629111052.pdf
<Drive name for removable media>:\7790_preview.pdf
<Drive name for removable media>:\clip_1080_5sec_10mbps_h264.mp4
<Drive name for removable media>:\tunpersonalca1.pem
<Drive name for removable media>:\investmentbankca_ca8.pem
<Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4
<Drive name for removable media>:\firefly1.mov
<Drive name for removable media>:\spanner.mov
<Drive name for removable media>:\3.jpg
<Drive name for removable media>:\210252809.jpg
<Drive name for removable media>:\13.jpg
<Drive name for removable media>:\pushkin.jpg
<Drive name for removable media>:\168.jpg
<Drive name for removable media>:\51.mp4
<Drive name for removable media>:\issi2013_template_for_posters.docx
<Drive name for removable media>:\dissolveanother.png
<Drive name for removable media>:\contenttypes.rdf
<Drive name for removable media>:\foaf.rdf
<Drive name for removable media>:\sioc.rdf
<Drive name for removable media>:\taxus_baccata.rdf
<Drive name for removable media>:\skos.rdf
<Drive name for removable media>:\digest.rdf
<Drive name for removable media>:\roozenedowebinar.pptx
<Drive name for removable media>:\samieee_obiee_presentation.pptx
<Drive name for removable media>:\hypothyroidism_slides.pptx
<Drive name for removable media>:\asaprojectcompetition.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>:\proposaltemplates.ppt
<Drive name for removable media>:\ppswamp.ppt
<Drive name for removable media>:\ksearch_esa_talk.ppt
<Drive name for removable media>:\sim_gametheory_to_finance.ppt
<Drive name for removable media>:\metac.ppt
<Drive name for removable media>:\breakpoint.png
<Drive name for removable media>:\calibre.png
<Drive name for removable media>:\4f0bf7ff71f28.jpg
<Drive name for removable media>:\clip_480_5sec_6mbps_h264.mp4
<Drive name for removable media>:\13.jpeg
<Drive name for removable media>:\region-north-karelia.jpeg
<Drive name for removable media>:\1189.jpeg
<Drive name for removable media>:\tileimage.bmp
<Drive name for removable media>:\cveuropeo.doc
<Drive name for removable media>:\508softwareandos.doc
<Drive name for removable media>:\contosoroot_1.cer
<Drive name for removable media>:\contoso.cer
<Drive name for removable media>:\sdksampleunprivdeveloper.cer
<Drive name for removable media>:\pmd.cer
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\dashborder_144.bmp
<Drive name for removable media>:\toolbar.bmp
<Drive name for removable media>:\weeklysheet1215.doc
<Drive name for removable media>:\dialmap.bmp
<Drive name for removable media>:\dashborder_192.bmp
<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>:\000814251_video_01.avi
<Drive name for removable media>:\join.avi
<Drive name for removable media>:\archer.avi
<Drive name for removable media>:\swc_2009-03-02.rdf
<Drive name for removable media>:\arrow-down.png
<Drive name for removable media>:\nwfieldnotes1966.docx
<Drive name for removable media>:\adhd_and_obesity.docx
<Drive name for removable media>:\lisp_success.doc
<Drive name for removable media>:\pushkin.jpeg
<Drive name for removable media>:\2.jpeg
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\adadsi.html
<Drive name for removable media>:\browse.html
<Drive name for removable media>:\tree_view.html
<Drive name for removable media>:\alert.html
<Drive name for removable media>:\browse.htm
<Drive name for removable media>:\alert.htm
<Drive name for removable media>:\trivial-merge.htm
<Drive name for removable media>:\iisstart.htm
<Drive name for removable media>:\64bit_notes.htm
<Drive name for removable media>:\notepad.exe
<Drive name for removable media>:\dotnetfx45_full_setup.exe
<Drive name for removable media>:\hadac_newsletter_july_2010_final.docx
<Drive name for removable media>:\sdszfo.docx
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx
<Drive name for removable media>:\holycrosschurchinstructions.docx
<Drive name for removable media>:\aoc_saq_d_v3_merchant.docx
<Drive name for removable media>:\waterlandhealthkano.rtf

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%\2de9ec0a.zeppelin
%ProgramFiles%\!!! all your files are encrypted !!!.txt
C:\perflogs\admin\!!! all your files are encrypted !!!.txt
C:\perflogs\!!! all your files are encrypted !!!.txt
C:\msocache\all users\!!! all your files are encrypted !!!.txt
D:\$recycle.bin\s-1-5-21-3150914307-1777937420-491476919-1000\!!! all your files are encrypted !!!.txt
C:\msocache\!!! all your files are encrypted !!!.txt
C:\kms\!!! all your files are encrypted !!!.txt
C:\documents and settings\!!! all your files are encrypted !!!.txt
C:\$recycle.bin\s-1-5-21-3150914307-1777937420-491476919-1000\!!! all your files are encrypted !!!.txt
D:\$recycle.bin\!!! all your files are encrypted !!!.txt
D:\!!! all your files are encrypted !!!.txt
D:\$recycle.bin\s-1-5-21-3150914307-1777937420-491476919-1000\.zeppelin
D:\$recycle.bin\.zeppelin
C:\$recycle.bin\!!! all your files are encrypted !!!.txt
C:\!!! all your files are encrypted !!!.txt
C:\kms\.zeppelin
C:\$recycle.bin\s-1-5-21-3150914307-1777937420-491476919-1000\.zeppelin
C:\$recycle.bin\.zeppelin
%TEMP%\~temp001.bat
%TEMP%\7584ff9c.zeppelin
%APPDATA%\microsoft\windows\smss.exe
%CommonProgramFiles%\!!! all your files are encrypted !!!.txt
%ProgramFiles%\dvd maker\!!! all your files are encrypted !!!.txt

Deletes the following files

%TEMP%\2de9ec0a.zeppelin
%TEMP%\7584ff9c.zeppelin

Modifies the following files

<Drive name for removable media>:\archer.avi
<Drive name for removable media>:\hypothyroidism_slides.pptx
<Drive name for removable media>:\asaprojectcompetition.pptx
<Drive name for removable media>:\indogerman2010.pptx
<Drive name for removable media>:\weeklysheet1215.doc
<Drive name for removable media>:\lisp_success.doc
<Drive name for removable media>:\cveuropeo.doc
<Drive name for removable media>:\508softwareandos.doc
<Drive name for removable media>:\contosoroot_1.cer
<Drive name for removable media>:\contoso.cer
<Drive name for removable media>:\sdksampleunprivdeveloper.cer
<Drive name for removable media>:\samieee_obiee_presentation.pptx
<Drive name for removable media>:\pmd.cer
<Drive name for removable media>:\dashborder_144.bmp
<Drive name for removable media>:\tileimage.bmp
<Drive name for removable media>:\toolbar.bmp
<Drive name for removable media>:\dialmap.bmp
<Drive name for removable media>:\dashborder_192.bmp
<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>:\000814251_video_01.avi
<Drive name for removable media>:\join.avi
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\roozenedowebinar.pptx

Deletes itself.

Modifies user data files (Trojan.Encoder).

Miscellaneous

Creates and executes the following

'%APPDATA%\microsoft\windows\smss.exe' -start
'%APPDATA%\microsoft\windows\smss.exe' -agent 0
'%APPDATA%\microsoft\windows\smss.exe' -agent 1
'%APPDATA%\microsoft\windows\smss.exe' -agent 2

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
'%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)

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