Virus: Worm/Palevo.zlt Date discovered: 01/04/2010 Type: Worm In the wild: Yes Reported Infections: Low to medium Distribution Potential: Medium Damage Potential: Low to medium Static file: Yes File size: 109.056 Bytes MD5 checksum: 8a2fc1c7c7bda12e344e4f652cc7d091 IVDF version: 7.10.06.11 - Thursday, April 1, 2010
General Methods of propagation: • Autorun feature • Messenger • Peer to Peer Aliases: • Mcafee: W32/Palevo.gen.a virus • Sophos: Mal/Palevo-A • Bitdefender: Win32.Worm.Palevo.AV • Panda: W32/P2Pworm.FW • Eset: Win32/Peerfrag.GL 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 locations: • %HOME%\csrss.exe • %drive% \CAROBNJAK\jellena.exe It deletes the initially executed copy of itself. The following files are created: – %drive% :\RECYCLER\%CLSID% \Desktop.ini – %drive% \autorun.inf This is a non malicious text file with the following content: • %code that runs malware% – %temporary internet files% \kristijan[1].exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.104960 – %TEMPDIR% \890.exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.104960 – %TEMPDIR% \127.exe – %temporary internet files% \24[1].exe – %temporary internet files% \icq600[1].exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.auvi – %HOME%\Application Data\lbisov.exe – %drive% :\RECYCLER\%CLSID% \yv8g67.exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.auvi – %TEMPDIR% \8975119.exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.auvi – %HOME%\Application Data\ozzfhv.exe Further investigation pointed out that this file is malware, too. Detected as: Worm/Palevo.104960 It tries to download some files: – The locations are the following: • http://rapidshare.com/files/415338241/********** • http://rs816tl3.rapidshare.com/files/415338241/********** – The location is the following: • http://94.228.214.202/********** – The location is the following: • http://193.104.186.88:38716/********** – The location is the following: • http://94.228.214.202/chivas/********** – The location is the following: • http://178.162.182.141:31045/********** – The location is the following: • http://178.162.182.141:31045/********** It tries to executes the following files: – Filename: • %TEMPDIR% \127.exe – Filename: • %TEMPDIR% \890.exe – Filename: • %TEMPDIR% \8975119.exe Registry The following registry keys are added in order to run the processes after reboot: – [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] • "Taskman"="%HOME%\Application Data\ozzfhv.exe" – [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] • "Shell"="%recycle bin% \%CLSID% \yv8g67.exe,%HOME%\Application Data\ozzfhv.exe,explorer.exe,%HOME%\Application Data\lbisov.exe" P2P In order to infect other systems in the Peer to Peer network community the following action is performed: It retrieves shared folders by querying the following registry keys: • Software\BearShare\General • Software\iMesh\General • Software\Shareaza\Shareaza\Downloads • Software\Kazaa\LocalContent • Software\DC++ • Software\eMule • Software\Microsoft\Windows\CurrentVersion\Uninstall\eMule Plus_is1 It searches for directories that contain the following substring: • \Local Settings\Application Data\Ares\My Shared Folder Messenger It is spreading via Messenger. The characteristics are described below: – Windows Live Messenger The URL then refers to a copy of the described malware. If the user downloads and executes this file the infection process will start again. Backdoor The following ports are opened: – sandra.pri**********.com on UDP port 44000 – gut**********.com on UDP port 8111 – 77.91.22**********.248 on UDP port 15000 – 91.211.11**********.127 on UDP port 8111 – f5v**********.com on UDP port 443 – 95.211.**********.148 on UDP port 5190 Injection – It injects itself as a remote thread into a process. Process name: • explorer.exe 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 Monday, September 6, 2010 Description updated by Petre Galan on Wednesday, September 8, 2010
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