Trojan.Encoder.43809

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'allkeeper' = 'C:\users\Public\conlhost.exe'

Creates the following files on removable media

<Drive name for removable media>:\coffee.bmp
<Drive name for removable media>:\tileimage.bmp
<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>:\applicantform_en.doc
<Drive name for removable media>:\issi2013_template_for_posters.docx
<Drive name for removable media>:\file_p_00000000_1371597592.docx
<Drive name for removable media>:\nwfieldnotes1966.docx
<Drive name for removable media>:\sdszfo.docx
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx
<Drive name for removable media>:\browse.html
<Drive name for removable media>:\about.html
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\iisstart.html
<Drive name for removable media>:\tree_view.html
<Drive name for removable media>:\3.jpeg
<Drive name for removable media>:\4f0bf7ff71f28.jpeg
<Drive name for removable media>:\168.jpeg
<Drive name for removable media>:\1189.jpeg
<Drive name for removable media>:\210252809.jpeg
<Drive name for removable media>:\pushkin.jpeg
<Drive name for removable media>:\parnas_01.jpeg
<Drive name for removable media>:\210252809.jpg
<Drive name for removable media>:\parnas_01.jpg
<Drive name for removable media>:\region-north-karelia.jpg
<Drive name for removable media>:\1189.jpg
<Drive name for removable media>:\bc01.pdf
<Drive name for removable media>:\fil_20060629111052.pdf
<Drive name for removable media>:\spib_pima.pdf
<Drive name for removable media>:\ff_ot_user_guide.pdf
<Drive name for removable media>:\10thingscondoms.pdf
<Drive name for removable media>:\2015-02-worms-nanoparticle-toxicity.pdf
<Drive name for removable media>:\arrow-down.png
<Drive name for removable media>:\dissolveanother.png
<Drive name for removable media>:\cleanlyrics.png
<Drive name for removable media>:\breakpoint.png
<Drive name for removable media>:\sacs_presentation_sacs_qep_improving_rt_education_final.ppt
<Drive name for removable media>:\mappingconcepthubberlin.ppt
<Drive name for removable media>:\ppswamp.ppt
<Drive name for removable media>:\metac.ppt
<Drive name for removable media>:\sim_gametheory_to_finance.ppt
<Drive name for removable media>:\indogerman2010.pptx
<Drive name for removable media>:\gruenspecht_02172016.pptx
<Drive name for removable media>:\asaprojectcompetition.pptx
<Drive name for removable media>:\phytoremediation.rtf
<Drive name for removable media>:\static_electricity_easy_and_quick_activities.rtf
<Drive name for removable media>:\waterlandhealthkano.rtf
<Drive name for removable media>:\fungalnameauthors.rtf
<Drive name for removable media>:\subjectclassification.xls
<Drive name for removable media>:\price030215.xls
<Drive name for removable media>:\contractualdeadlines.xls
<Drive name for removable media>:\trtf_matrix2012_oct.xlsx
<Drive name for removable media>:\cee_mmsprogram_summary_public.xlsx
<Drive name for removable media>:\suspendedcompanies.xlsx
<Drive name for removable media>:\disclosuredetails.xlsx
<Drive name for removable media>:\national_autism_preparation_programs.xlsx
<Drive name for removable media>:\1sm_price.zip
<Drive name for removable media>:\excel_example.zip
<Drive name for removable media>:\productos.zip
<Drive name for removable media>:\subjectclassification.zip
<Drive name for removable media>:\contractualdeadlines.zip
<Drive name for removable media>:\fiche_inscription_2015.zip

Malicious functions

Reads files which store third party applications passwords

%HOMEPATH%\desktop\coffee.bmp
%HOMEPATH%\desktop\dashborder_120.bmp
%HOMEPATH%\desktop\dashborder_96.bmp
%HOMEPATH%\desktop\fi51.doc
%HOMEPATH%\desktop\file_p_00000000_1371597592.docx
%HOMEPATH%\desktop\hanni_umami_chapter.doc
%HOMEPATH%\desktop\holycrosschurchinstructions.docx
%HOMEPATH%\desktop\issi2013_template_for_posters.docx
%HOMEPATH%\desktop\nwfieldnotes1966.docx
%HOMEPATH%\desktop\ovp25012015.doc
%HOMEPATH%\desktop\weeklysheet1215.doc

Modifies file system

Creates the following files

C:\users\public\del.bat
C:\users\public\conlhost.exe
C:\users\public\files
C:\users\public\testdecrypt
C:\files_back.txt
C:\users\files_back.txt
C:\users\public\files_back.txt
%HOMEPATH%\files_back.txt
%HOMEPATH%\favorites\files_back.txt
%HOMEPATH%\pictures\files_back.txt
C:\users\public\time.e

Sets the 'hidden' attribute to the following files

C:\users\public\conlhost.exe
C:\users\public\time.e

Modifies the following files

<Drive name for removable media>:\coffee.bmp
<Drive name for removable media>:\tileimage.bmp
<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>:\applicantform_en.doc
<Drive name for removable media>:\issi2013_template_for_posters.docx
<Drive name for removable media>:\file_p_00000000_1371597592.docx
<Drive name for removable media>:\nwfieldnotes1966.docx
<Drive name for removable media>:\sdszfo.docx
<Drive name for removable media>:\thlps_keeper_mayer_1965.docx
<Drive name for removable media>:\browse.html
<Drive name for removable media>:\about.html
<Drive name for removable media>:\howto-index.html
<Drive name for removable media>:\iisstart.html
<Drive name for removable media>:\tree_view.html

Modifies user data files (Trojan.Encoder).

Network activity

Connects to

'46.##.169.106':80
'bl###chain.info':443
'oc##.#igicert.cn':80

TCP

HTTP GET requests

http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?ef##############
http://oc##.#igicert.cn/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEA%2FgMquETQMxBsUMjhPIsGg%3D

Other

'bl###chain.info':443

UDP

DNS ASK bl###chain.info
DNS ASK oc##.#igicert.cn

Miscellaneous

Creates and executes the following

'C:\users\public\conlhost.exe'

Executes the following

'%WINDIR%\syswow64\cmd.exe' /c C:\users\Public\del.bat
'%WINDIR%\syswow64\reg.exe' ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "allkeeper" /t REG_SZ /d "C:\users\Public\conlhost.exe" /f /reg:64
'%WINDIR%\syswow64\reg.exe' ADD "HKEY_CURRENT_USER\SOFTWARE" /v "crypted" /t REG_SZ /d "1" /reg:64
'%WINDIR%\syswow64\cmd.exe' /c C:\users\Public\del.bat' (with hidden window)
'%WINDIR%\syswow64\reg.exe' ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "allkeeper" /t REG_SZ /d "C:\users\Public\conlhost.exe" /f /reg:64' (with hidden window)
'%WINDIR%\syswow64\reg.exe' ADD "HKEY_CURRENT_USER\SOFTWARE" /v "crypted" /t REG_SZ /d "1" /reg:64' (with hidden window)

Technologies

Terminology

Training and education

Myths

Technical Information

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