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Virus:TR/PSW.Zbot.258048.270
Date discovered:14/01/2013
Type:Trojan
Subtype:PSW
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:255344 Bytes
MD5 checksum:fa3bc1fd5c27206c47492c6ca5fcfaf4
VDF version:7.11.57.60 - Monday, January 14, 2013
IVDF version:7.11.57.60 - Monday, January 14, 2013

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Bitdefender: Gen:Variant.Graftor.64261
   •  Eset: Win32/Kryptik.ARZP
   •  DrWeb: Trojan.PWS.Panda.2401


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Drops a malicious file
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %Appdata%\%six-digit random character string%\%five-digit random character string%.exe



It deletes the initially executed copy of itself.



The following files are created:

– %Appdata%\%five-digit random character string%\%five-digit random character string%.%three-digit random character string%
%TEMPDIR%\tmp%eight-digit random character string%.bat Furthermore it gets executed after it was fully created.

 Registry The following registry key is added in order to run the process after reboot:

– [HKCU\Software\Microsoft\Windows\Currentversion\Run]
   • "Adabcovofo"="%Appdata%\\%six-digit random character string% \\%5 random character string%.exe\"



The following registry key is added:

– [HKCU\Software\Microsoft\Avgu]


The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Zones\0]
   Old value:
   • "1609"=dword:00000001
   New value:
   • "1609"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Zones\1]
   Old value:
   • "1609"=dword:00000001
   • "1406"=dword:00000001
   New value:
   • "1609"=dword:00000000
   • "1406"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Zones\2]
   Old value:
   • "1609"=dword:00000001
   New value:
   • "1609"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Zones\3]
   Old value:
   • "1406"=dword:00000003
   • "1609"=dword:00000001
   New value:
   • "1406"=dword:00000000
   • "1609"=dword:00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   Zones\4]
   Old value:
   • "1406"=dword:00000003
   • "1609"=dword:00000001
   New value:
   • "1406"=dword:00000000
   • "1609"=dword:00000000

 Injection     Process name:
   • Explorer.exe


 Miscellaneous Trusted file pretending:
Its process pretends to be the following trusted process: NTSD.Exe
Please note that the malware even fakes the icon. As a result it appears to be the above mentioned process.

Description inserted by Wensin Lee on Wednesday, January 16, 2013
Description updated by Wensin Lee on Wednesday, January 16, 2013

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