Trojan.Encoder.30890

Technical Information

Malicious functions

Injects code into

the following system processes:

%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe

Reads files which store third party applications passwords

%HOMEPATH%\desktop\210252809.jpg
%HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
%HOMEPATH%\desktop\hanni_umami_chapter.doc
%HOMEPATH%\desktop\nwfieldnotes1966.docx
%HOMEPATH%\desktop\pushkin.jpg
%HOMEPATH%\desktop\region-north-karelia.jpg
%HOMEPATH%\desktop\correct.avi
%HOMEPATH%\desktop\split.avi

Modifies file system

Creates the following files

%WINDIR%\microsoft.net\framework\v2.0.50727\b.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\r.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\s.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\t.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\taskdl.exe
%WINDIR%\microsoft.net\framework\v2.0.50727\taskse.exe
%WINDIR%\microsoft.net\framework\v2.0.50727\u.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\00000000.pky
%WINDIR%\microsoft.net\framework\v2.0.50727\00000000.eky
%WINDIR%\microsoft.net\framework\v2.0.50727\00000000.res
%WINDIR%\microsoft.net\framework\v2.0.50727\@wanadecryptor@.exe
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_german.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\45441580465242.bat
%HOMEPATH%\desktop\168.jpg.wncryt
%HOMEPATH%\desktop\210252809.jpeg.wncryt
%WINDIR%\microsoft.net\framework\v2.0.50727\m.vbs
%HOMEPATH%\desktop\210252809.jpg.wncryt
%HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx.wncryt
%HOMEPATH%\desktop\hanni_umami_chapter.doc.wncryt
%HOMEPATH%\desktop\nwfieldnotes1966.docx.wncryt
%WINDIR%\microsoft.net\framework\v2.0.50727\@wanadecryptor@.exe.lnk
%HOMEPATH%\desktop\pushkin.jpg.wncryt
%HOMEPATH%\desktop\region-north-karelia.jpg.wncryt
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_turkish.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_vietnamese.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_swedish.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_spanish.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_slovak.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_bulgarian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_chinese (simplified).wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_chinese (traditional).wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_croatian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_czech.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_danish.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_dutch.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_english.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_filipino.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_finnish.wnry
%HOMEPATH%\desktop\@please_read_me@.txt
%WINDIR%\microsoft.net\framework\v2.0.50727\@please_read_me@.txt
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_french.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_indonesian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_italian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_japanese.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_korean.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_latvian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_norwegian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_polish.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_portuguese.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_romanian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_russian.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\c.wnry
%WINDIR%\microsoft.net\framework\v2.0.50727\msg\m_greek.wnry
%HOMEPATH%\desktop\@wanadecryptor@.exe

Deletes the following files

%WINDIR%\microsoft.net\framework\v2.0.50727\m.vbs
<Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.wncryt

Moves the following files

from %HOMEPATH%\desktop\168.jpg.wncryt to %HOMEPATH%\desktop\168.jpg.wncry
from %HOMEPATH%\desktop\210252809.jpeg.wncryt to %HOMEPATH%\desktop\210252809.jpeg.wncry
from %HOMEPATH%\desktop\210252809.jpg.wncryt to %HOMEPATH%\desktop\210252809.jpg.wncry
from %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx.wncryt to %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx.wncry
from %HOMEPATH%\desktop\hanni_umami_chapter.doc.wncryt to %HOMEPATH%\desktop\hanni_umami_chapter.doc.wncry
from %HOMEPATH%\desktop\nwfieldnotes1966.docx.wncryt to %HOMEPATH%\desktop\nwfieldnotes1966.docx.wncry
from %HOMEPATH%\desktop\pushkin.jpg.wncryt to %HOMEPATH%\desktop\pushkin.jpg.wncry
from %HOMEPATH%\desktop\region-north-karelia.jpg.wncryt to %HOMEPATH%\desktop\region-north-karelia.jpg.wncry

Modifies user data files (Trojan.Encoder).

Changes user data files extensions (Trojan.Encoder).

Miscellaneous

Creates and executes the following

'%WINDIR%\microsoft.net\framework\v2.0.50727\taskdl.exe'
'%WINDIR%\syswow64\attrib.exe' +h .' (with hidden window)
'%WINDIR%\syswow64\icacls.exe' . /grant Everyone:F /T /C /Q' (with hidden window)
'%WINDIR%\microsoft.net\framework\v2.0.50727\taskdl.exe' ' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /c 45441580465242.bat' (with hidden window)

Executes the following