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Virus:Worm/Palevo.778.A
Date discovered:09/09/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:77.824 Bytes
MD5 checksum:e4008aa4d642e714991a71b65c0b89fa
VDF version:7.10.05.24
IVDF version:7.10.11.120 - Thursday, September 9, 2010

 General Aliases:
   •  Sophos: Mal/Rimecud-E
   •  Bitdefender: Trojan.Bredolab.DA
   •  Panda: W32/P2Pworm.OY
   •  Eset: Win32/Bflient.K
   •  GData: Trojan.Bredolab.DA


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


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %HOME%\Application Data\ltzqai.exe



It overwrites the following files.
%recycle bin%\R-1-5-21-1482476501-1644491937-682003330-1013\acleaner.exe
%recycle bin%\R-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini



The following files are created:

%recycle bin%\%CLSID%\Desktop.ini
%recycle bin%\R-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini
%recycle bin%\%CLSID%\jwjqa.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\R-1-5-21-1482476501-1644491937-682003330-1013\acleaner.exe
%recycle bin%\%CLSID%\games.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\%CLSID%\lsvb.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\%CLSID%\jwkd.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\%CLSID%\lsq.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\%CLSID%\jikd.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

%recycle bin%\%CLSID%\dfe.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2




It tries to download some files:

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://b.suhi4hr.net/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded.

– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2


– The location is the following:
   • http://two.natnatraoi.com/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen2

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Taskman"="%recycle bin%\R-1-5-21-1482476501-1644491937-682003330-1013\acleaner.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Fgfk"="%recycle bin%\%CLSID%\lsq.exe"
   • "Fnfx"="%recycle bin%\%CLSID%\dfe.exe"
   • "Fvbk"="%recycle bin%\%CLSID%\lsvb.exe"
   • "games"="%recycle bin%\%CLSID%\games.exe"
   • "jaqq"="%recycle bin%\%CLSID%\jwkd.exe"
   • "jkqq"="%recycle bin%\%CLSID%\jikd.exe"
   • "sdjwe"="%recycle bin%\%CLSID%\jwjqa.exe"

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="%recycle bin%\%CLSID%\dfe.exe,%recycle bin%\%CLSID%\lsq.exe,%recycle bin%\%CLSID%\jikd.exe,%recycle bin%\%CLSID%\lsvb.exe,%recycle bin%\%CLSID%\jwjqa.exe,%recycle bin%\%CLSID%\games.exe,%HOME%\Application Data\ltzqai.exe,explorer.exe,%recycle bin%\%CLSID%\jwkd.exe"

 Backdoor Contact server:
All of the following:
   • hub3.toi**********.com:9955 (UDP)
   • tf122.tef**********.com:8800 (TCP)
   • 60.190.22**********.125:1110 (TCP)
   • 209.90.13**********.220:8800 (TCP)
   • tf50.tef**********.com:8800 (TCP)
   • tf18.tef**********.com:8800 (TCP)
   • tf130.tef**********.com:8800 (TCP)
   • tf98.tef**********.com:8800 (TCP)
   • 66.7.22**********.26:8800 (TCP)


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

    Process name:
   • explorer.exe


 Miscellaneous Accesses internet resources:
   • http://two.natnatraoi.com/**********
   • http://two.natnatraoi.com/**********


Mutex:
It creates the following Mutex:
   • nbev+32

 File details Programming language:
The malware program was written in MS Visual C++.


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 Tuesday, March 15, 2011
Description updated by Petre Galan on Tuesday, March 15, 2011

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