BackDoor.Butirat.28

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'fdhat' = '%HOMEPATH%\fdhat.exe /s'
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'CB5.exe' = '%ProgramFiles(x86)%\Internet Explorer\83DC\CB5.exe'
[<HKLM>\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems] 'Windows' = '<SYSTEM32>\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows Ser...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000010] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000009] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000008] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000007] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000006] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001] 'PackedCatalogItem' = '{6d,73,77,73,6f,63,6b,2e,64,6c,6c,00,00,00,00,00,00,00,00,00...
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\NameSpace_Catalog5\Catalog_Entries\000000000005] 'LibraryPath' = 'mswsock.dll'
[<HKLM>\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\NameSpace_Catalog5\Catalog_Entries\000000000001] 'LibraryPath' = 'mswsock.dll'

Creates the following files on removable media

<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\rcx4c76.tmp
<Drive name for removable media>:\asm.exe
<Drive name for removable media>:\rcx4850.tmp
<Drive name for removable media>:\calibre.exe
<Drive name for removable media>:\rcx442a.tmp
<Drive name for removable media>:\rcx43fb.tmp
<Drive name for removable media>:\rcx43bb.tmp
<Drive name for removable media>:\lom602.exe
<Drive name for removable media>:\rcx3f86.tmp
<Drive name for removable media>:\rcx509c.tmp
<Drive name for removable media>:\background.exe
<Drive name for removable media>:\2015-02-patients-topic-work-related-asthma-jobs.exe
<Drive name for removable media>:\rcx3ab2.tmp
<Drive name for removable media>:\rcx3a92.tmp
<Drive name for removable media>:\rcx3a53.tmp
<Drive name for removable media>:\spib_pima.exe
<Drive name for removable media>:\rcx35fe.tmp
<Drive name for removable media>:\rcx3487.tmp
<Drive name for removable media>:\clip_1080_5sec_10mbps_h264.exe
<Drive name for removable media>:\rcx2edb.tmp
<Drive name for removable media>:\rcx3f56.tmp
<Drive name for removable media>:\rcxf65b.tmp
<Drive name for removable media>:\dissolveanother.exe
<Drive name for removable media>:\rcx7a49.tmp
<Drive name for removable media>:\excel_example.exe
<Drive name for removable media>:\rcx7613.tmp
<Drive name for removable media>:\rcx75f3.tmp
<Drive name for removable media>:\rcx75c3.tmp
<Drive name for removable media>:\1sm_price.exe
<Drive name for removable media>:\rcx718e.tmp
<Drive name for removable media>:\rcx715e.tmp
<Drive name for removable media>:\passport_pal.exe
<Drive name for removable media>:\rcx6d29.tmp
<Drive name for removable media>:\rcx6ce9.tmp
<Drive name for removable media>:\testwmv.exe
<Drive name for removable media>:\rcx68a4.tmp
<Drive name for removable media>:\rcx6875.tmp
<Drive name for removable media>:\babyboymaintoscenesbackground_pal.exe
<Drive name for removable media>:\rcx643f.tmp
<Drive name for removable media>:\arrow-down.exe
<Drive name for removable media>:\rcx600a.tmp
<Drive name for removable media>:\breakpoint.exe
<Drive name for removable media>:\rcx5bb5.tmp
<Drive name for removable media>:\cleanlyrics.exe
<Drive name for removable media>:\rcx2da2.tmp
<Drive name for removable media>:\rcx3ed8.tmp
<Drive name for removable media>:\51.exe
<Drive name for removable media>:\rcx292e.tmp
<Drive name for removable media>:\pushkin.exe
<Drive name for removable media>:\dashborder_120.exe
<Drive name for removable media>:\rcxea19.tmp
<Drive name for removable media>:\applicantform_en.exe
<Drive name for removable media>:\rcxe4ea.tmp
<Drive name for removable media>:\dashborder_144.exe
<Drive name for removable media>:\rcxd8e8.tmp
<Drive name for removable media>:\dial.exe
<Drive name for removable media>:\rcxcd33.tmp
<Drive name for removable media>:\tileimage.exe
<Drive name for removable media>:\rcxc7e5.tmp
<Drive name for removable media>:\rcxb9e0.tmp
<Drive name for removable media>:\rcxea69.tmp
<Drive name for removable media>:\dashborder_96.exe
<Drive name for removable media>:\rcxa150.tmp
<Drive name for removable media>:\dashborder_192.exe
<Drive name for removable media>:\rcx90ac.tmp
<Drive name for removable media>:\coffee.exe
<Drive name for removable media>:\rcx7fe9.tmp
<Drive name for removable media>:\rcx531e.tmp
<Drive name for removable media>:\delete.exe
<Drive name for removable media>:\fdhat.exe
<Drive name for removable media>:\rcx7a79.tmp
<Drive name for removable media>:\rcx55db.tmp
<Drive name for removable media>:\weeklysheet1215.exe
<Drive name for removable media>:\rcxf7e3.tmp
<Drive name for removable media>:\rcxea49.tmp
<Drive name for removable media>:\rcx24da.tmp
<Drive name for removable media>:\168.exe
<Drive name for removable media>:\rcx2056.tmp
<Drive name for removable media>:\1189.exe
<Drive name for removable media>:\rcx1be2.tmp
<Drive name for removable media>:\4f0bf7ff71f28.exe
<Drive name for removable media>:\rcx1730.tmp
<Drive name for removable media>:\parnas_01.exe
<Drive name for removable media>:\rcx12dc.tmp
<Drive name for removable media>:\rcx129c.tmp
<Drive name for removable media>:\rcx125d.tmp
<Drive name for removable media>:\cveuropeo.exe
<Drive name for removable media>:\rcxbe6.tmp
<Drive name for removable media>:\rcxbd6.tmp
<Drive name for removable media>:\rcxbb5.tmp
<Drive name for removable media>:\fi51.exe
<Drive name for removable media>:\rcxfddf.tmp
<Drive name for removable media>:\rcxfdaf.tmp
<Drive name for removable media>:\rcxfc67.tmp
<Drive name for removable media>:\508softwareandos.exe
<Drive name for removable media>:\rcxf7a4.tmp
<Drive name for removable media>:\rcx7ab8.tmp

Malicious functions

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

Injects code into

the following system processes:

<SYSTEM32>\csrss.exe

the following user processes:

iexplore.exe

Searches for windows to

detect programs and games:

ClassName: 'SkinuxWindow', WindowName: 'MySpaceIM with Skype'

Modifies settings of Windows Internet Explorer

[<HKCU>\Software\Microsoft\windows\CurrentVersion\Internet Settings] 'ProxyEnable' = '00000001'
[<HKCU>\Software\Microsoft\windows\CurrentVersion\Internet Settings] 'ProxyServer' = 'http=127.0.0.1:64364'

Modifies file system

Creates the following files

%HOMEPATH%\ya6nppl9.exe
%HOMEPATH%\fdhat.exe
%HOMEPATH%\achost.exe
%HOMEPATH%\bchost.exe
%ProgramFiles(x86)%\internet explorer\83dc\cb5.exe
%APPDATA%\ccd95\50e4.cd9
%HOMEPATH%\cchost.exe
%HOMEPATH%\dchost.exe
%WINDIR%\assembly\temp\@
%WINDIR%\assembly\temp\cfg.ini
<SYSTEM32>\consrv.dll
%WINDIR%\assembly\gac_64\desktop.ini
%WINDIR%\assembly\gac_32\desktop.ini

Sets the 'hidden' attribute to the following files

%HOMEPATH%\fdhat.exe
<Drive name for removable media>:\autorun.inf

Deletes the following files

%HOMEPATH%\cchost.exe

Modifies the following files

%APPDATA%\mozilla\firefox\profiles\gn7ryp3k.default\prefs.js

Network activity

Connects to

'en#####ringcrossing.com':80
'localhost':80

TCP

HTTP GET requests

http://en#####ringcrossing.com/images/misc/64646.png?pr##########################################################################################################################################...

UDP

DNS ASK pd#####storeonline.com
DNS ASK en#####ringcrossing.com
DNS ASK lo####reonline.com
DNS ASK si####xstored.com

Miscellaneous

Creates and executes the following

'%HOMEPATH%\ya6nppl9.exe'
'%HOMEPATH%\fdhat.exe'
'%HOMEPATH%\achost.exe'
'%HOMEPATH%\bchost.exe'
'%HOMEPATH%\bchost.exe' start%APPDATA%\CCD95\89283.exe%%APPDATA%\CCD95
'%HOMEPATH%\bchost.exe' start%ProgramFiles(x86)%\950E4\lvvm.exe%%ProgramFiles(x86)%\950E4
'%HOMEPATH%\cchost.exe'
'%HOMEPATH%\dchost.exe'
'%WINDIR%\syswow64\cmd.exe' /c tasklist&&del yA6npPl9.exe' (with hidden window)

Executes the following

'%WINDIR%\syswow64\cmd.exe' /c tasklist&&del yA6npPl9.exe
'%WINDIR%\syswow64\tasklist.exe'
'%WINDIR%\explorer.exe'

Tecnologías

Términos

Formación y educación

Mitos

Technical Information

Curing recommendations

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