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Virus:TR/Spy.ZBot.ajmv
Date discovered:20/05/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:91.136 Bytes
MD5 checksum:dac43268303785a524a1ebcc17424a19
IVDF version:7.10.07.145 - Thursday, May 20, 2010

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Bitdefender: Trojan.Generic.KD.12776
   •  Panda: Trj/Sinowal.XDY
   •  Eset: Win32/Spy.Zbot.JF


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following locations:
   • %SYSDIR%\sdra64.exe
   • %drive%\%executed file%



The following files are created:

%drive%\Autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

%SYSDIR%\lowsec\user.ds
%SYSDIR%\lowsec\local.ds

 Registry It creates the following entry in order to bypass the Windows XP firewall:



The following registry keys are added:

– [HKEY_USERS\S-1-5-20\SOFTWARE\Microsoft\
   Protected Storage System Provider\S-1-5-20]
   • "Migrate"=dword:0x00000002

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Network]
   • "UID"="%computer name%_00074208"

– [HKEY_USERS\S-1-5-20\Software\Microsoft\
   Protected Storage System Provider\S-1-5-20\Data 2\Windows]
   • "Value"=hex:01,00,00,00,1C,00,00,00,03,00,00,00,10,A8,96,0E,18,8A,FD,B9,AE,6E,2F,77,A2,D7,64,85,DD,AE,49,AC,65,79,C7,0B,10,00,00,00,DB,BA,31,A6,A7,8B,50,80,63,5F,2B,88,9E,BC,52,64,14,00,00,00,80,30,1E,A0,21,18,2F,C4,04,72,C9,C9,5B,F6,9D,88,D5,65,71,F7

– [HKEY_USERS\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\
   Network]
   • "UID"="%computer name%_0007C1E6"

– [HKEY_USERS\.DEFAULT\software\microsoft\windows\currentversion\
   explorer\{35106240-D2F0-DB35-716E-127EB80A0299}]
   • "{3039636B-5F3D-6C64-6675-696870667265}"=hex:F7,09,F2,0D
   • "{33373039-3132-3864-6B30-303233343434}"=hex:47,09,F2,0D

– [HKEY_USERS\.DEFAULT\Software\Microsoft\
   Protected Storage System Provider\S-1-5-18\Data 2\Windows]
   • "Value"=hex:01,00,00,00,1C,00,00,00,03,00,00,00,D1,E9,87,19,FA,1F,C2,92,9F,E6,AA,0B,72,F7,6A,EC,43,35,4E,5A,E2,01,17,64,10,00,00,00,E2,96,7F,78,01,CF,44,73,D0,B7,FA,36,F3,AB,D0,7B,14,00,00,00,DF,9D,82,E9,40,7A,0E,0A,5C,04,2F,05,4C,22,73,48,A3,CC,4A,A6

– [HKEY_USERS\S-1-5-19\SOFTWARE\Microsoft\
   Protected Storage System Provider\S-1-5-19]
   • "Migrate"=dword:0x00000002

– [HKEY_USERS\.DEFAULT\software\microsoft\windows\currentversion\
   explorer\{43BF8CD1-C5D5-2230-7BB2-98F22C2B7DC6}]
   • "{3039636B-5F3D-6C64-6675-696870667265}"=hex:F7,09,F2,0D
   • "{33373039-3132-3864-6B30-303233343434}"=hex:47,09,F2,0D

– [HKEY_USERS\S-1-5-19\Software\Microsoft\
   Protected Storage System Provider\S-1-5-19\Data 2\Windows]
   • "Value"=hex:01,00,00,00,1C,00,00,00,03,00,00,00,C5,AD,8B,30,19,4B,87,79,26,D7,A6,8A,85,08,B3,86,1F,9F,33,95,EF,25,62,BB,10,00,00,00,02,D4,18,F6,3D,29,A9,87,D4,3E,30,9D,8B,82,3C,81,14,00,00,00,55,3A,E6,2A,9B,AF,32,D3,88,87,4A,62,5F,D1,23,A0,4F,4B,C7,45

– [HKEY_USERS\.DEFAULT\SOFTWARE\Microsoft\
   Protected Storage System Provider\S-1-5-18]
   • "Migrate"=dword:0x00000002

– [HKEY_USERS\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\
   Network]
   • "UID"="%computer name%_00079383"



The following registry keys are changed:

– [HKEY_USERS\S-1-5-20\Software\Microsoft\Internet Explorer\Main]
   New value:
   • "Start Page"=""

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "userinit"="%SYSDIR%\userinit.exe,%SYSDIR%\sdra64.exe,"

– [HKEY_USERS\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\
   Winlogon]
   New value:
   • "ParseAutoexec"="1"

– [HKEY_USERS\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\
   Winlogon]
   New value:
   • "ParseAutoexec"="1"

– [HKEY_USERS\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\
   Winlogon]
   New value:
   • "ParseAutoexec"="1"

– [HKEY_USERS\S-1-5-19\Software\Microsoft\Internet Explorer\Main]
   New value:
   • "Start Page"=""

 Network Infection Exploit:
It makes use of the following Exploit:
– MS04-007 (ASN.1 Vulnerability)

 Stealing – A logging routine is started after a website is visited:
   • https://onlineeast.bankofamerica.com/cgi-bin/ias/*/GotoWelcome

 Injection – It injects itself as a remote thread into a process.

    Process name:
   • winlogon.exe



– It injects itself as a remote thread into a process.

    Process name:
   • svchost.exe



– It injects itself as a remote thread into a process.

It is injected into all processes.


 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Petre Galan on Thursday, September 30, 2010
Description updated by Andrei Ivanes on Friday, October 1, 2010

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