Trojan.Encoder.30043

Technical Information

To ensure autorun and distribution

Creates the following files on removable media

<Drive name for removable media>:\correct.avi
<Drive name for removable media>:\indogerman2010.pptx
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx
<Drive name for removable media>:\cveuropeo.doc
<Drive name for removable media>:\ovp25012015.doc
<Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc
<Drive name for removable media>:\weeklysheet1215.doc
<Drive name for removable media>:\hanni_umami_chapter.doc
<Drive name for removable media>:\contoso.cer
<Drive name for removable media>:\pmd.cer
<Drive name for removable media>:\contoso_1.cer
<Drive name for removable media>:\sdksampleunprivdeveloper.cer
<Drive name for removable media>:\contosoroot.cer
<Drive name for removable media>:\dashborder_192.bmp
<Drive name for removable media>:\tileimage.bmp
<Drive name for removable media>:\toolbar.bmp
<Drive name for removable media>:\dashborder_144.bmp
<Drive name for removable media>:\dashborder_96.bmp
<Drive name for removable media>:\dialmap.bmp
<Drive name for removable media>:\join.avi
<Drive name for removable media>:\000814251_video_01.avi
<Drive name for removable media>:\!!! all your files are encrypted !!!.txt
<Drive name for removable media>:\middaugh_keynote.pptx
<Drive name for removable media>:\asaprojectcompetition.pptx

Malicious functions

To complicate detection of its presence in the operating system,

deletes volume shadow copies.

Modifies file system

Creates the following files

C:\far2\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini.[17b83731-b80f-8da3-c071-1e190e3b8a03]
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini
C:\far2\addons\colors\default_highlighting\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\arm\s\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\arm\s\armmanifest.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab
unc\mtrpozpf\users\all users\adobe\arm\s\armmanifest.msi
C:\far2\addons\colors\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\arm\reader_15.007.20033\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
unc\mtrpozpf\users\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi
C:\far2\addons\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\ntuser.pol.[17b83731-b80f-8da3-c071-1e190e3b8a03]
unc\mtrpozpf\users\all users\ntuser.pol
C:\far2\addons\colors\custom_highlighting\!!! all your files are encrypted !!!.txt
unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab.[17b83731-b80f-8da3-c071-1e190e3b8a03]

Sets the 'hidden' attribute to the following files

unc\mtrpozpf\users\all users\ntuser.pol.[17b83731-b80f-8da3-c071-1e190e3b8a03]

Moves the following files

from unc\mtrpozpf\users\all users\ntuser.pol to unc\mtrpozpf\users\all users\ntuser.pol.[17b83731-b80f-8da3-c071-1e190e3b8a03]
from unc\mtrpozpf\users\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi to unc\mtrpozpf\users\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
from unc\mtrpozpf\users\all users\adobe\arm\s\armmanifest.msi to unc\mtrpozpf\users\all users\adobe\arm\s\armmanifest.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
from unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini to unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini.[17b83731-b80f-8da3-c071-1e190e3b8a03]
from unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi to unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi.[17b83731-b80f-8da3-c071-1e190e3b8a03]
from unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab to unc\mtrpozpf\users\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab.[17b83731-b80f-8da3-c071-1e190e3b8a03]

Modifies user data files (Trojan.Encoder).

Changes user data files extensions (Trojan.Encoder).

Network activity

Connects to

'ip###ger.org':443

TCP

HTTP GET requests

http://ge###tool.com/
http://ip##gger.ru/1oZbc.jpg

'ge###tool.com':443

'ip##gger.ru':443

UDP

DNS ASK ge###tool.com
DNS ASK ip##gger.ru
DNS ASK ip###ger.org

Miscellaneous

Creates and executes the following

'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C sc config eventlog start=disabled' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log System' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log Security' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log Application' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C del "%userprofile%\documents\Default.rdp"' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C attrib "%userprofile%\documents\Default.rdp" -s -h' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C reg add "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers"' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C chcp 1250 && net view' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers" /f' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete backup' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup -keepversions:0' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Default" /va /f' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C chcp 1250 && net view "\\MTRPOZPF"' (with hidden window)

Executes the following

'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} bootstatuspolicy ignoreallfailures
'%WINDIR%\syswow64\net.exe' view
'%WINDIR%\syswow64\chcp.com' 1250
'%WINDIR%\syswow64\cmd.exe' /C chcp 1250 && net view
'%WINDIR%\syswow64\sc.exe' config eventlog start=disabled
'%WINDIR%\syswow64\cmd.exe' /C sc config eventlog start=disabled
'%WINDIR%\syswow64\wevtutil.exe' clear-log System
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log System
'%WINDIR%\syswow64\wevtutil.exe' clear-log Security
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log Security
'%WINDIR%\syswow64\wevtutil.exe' clear-log Application
'%WINDIR%\syswow64\cmd.exe' /C wevtutil.exe clear-log Application
'%WINDIR%\syswow64\cmd.exe' /C del "%userprofile%\documents\Default.rdp"
'%WINDIR%\syswow64\attrib.exe' "%HOMEPATH%\documents\Default.rdp" -s -h
'%WINDIR%\syswow64\cmd.exe' /C chcp 1250 && net view "\\MTRPOZPF"
'%WINDIR%\syswow64\cmd.exe' /C attrib "%userprofile%\documents\Default.rdp" -s -h
'%WINDIR%\syswow64\cmd.exe' /C reg add "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers"
'%WINDIR%\syswow64\reg.exe' delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers" /f
'%WINDIR%\syswow64\cmd.exe' /C reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers" /f
'%WINDIR%\syswow64\reg.exe' delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Default" /va /f
'%WINDIR%\syswow64\cmd.exe' /C reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Default" /va /f
'%WINDIR%\syswow64\cmd.exe' /C vssadmin delete shadows /all /quiet
'<SYSTEM32>\vssvc.exe'
'%WINDIR%\syswow64\cmd.exe' /C wmic shadowcopy delete
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete backup
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup -keepversions:0
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete systemstatebackup
'%WINDIR%\syswow64\cmd.exe' /C wbadmin delete catalog -quiet
'%WINDIR%\syswow64\cmd.exe' /C bcdedit /set {default} recoveryenabled no
'%WINDIR%\syswow64\reg.exe' add "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers"
'%WINDIR%\syswow64\net.exe' view "\\MTRPOZPF"

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