Virus: Worm/Brontok.Q.153 Date discovered: 14/08/2009 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: 43.476 Bytes MD5 checksum: a042ec98487ca36544b4281c80a1a4a2 IVDF version: 7.01.05.117 - Friday, August 14, 2009
General Aliases: • Mcafee: W32/Rontokbro.gen • Sophos: W32/Brontok-Gen • Panda: W32/Brontok.L.worm • Eset: Win32/Brontok.DJ • Bitdefender: Trojan.Generic.1934606 Platforms / OS: • Windows 2000 • Windows XP • Windows 2003 Side effects: • Downloads malicious files • Drops malicious files • Lowers security settings • Registry modification Files It copies itself to the following locations: • %SYSDIR% \Administrator's Setting.scr • %HOME%\Local Settings\Application Data\smss.exe • %HOME%\Start Menu\Programs\Startup\Empty.pif • %HOME%\Templates\Brengkolang.com • %WINDIR% \KesenjanganSosial.exe • %WINDIR% \ShellNew\RakyatKelaparan.exe • %HOME%\Local Settings\Application Data\lsass.exe • %SYSDIR% \cmd-brontok.exe • %HOME%\Local Settings\Application Data\csrss.exe • %HOME%\Local Settings\Application Data\inetinfo.exe • %HOME%\Local Settings\Application Data\winlogon.exe • %HOME%\Local Settings\Application Data\services.exe • %SYSDIR% \drivers\etc\hosts-Denied By-Administrator.com It overwrites the following files. – %SYSDIR% \drivers\etc\hosts – C:\autoexec.bat It deletes the initially executed copy of itself. It deletes the following files: • %HOME%\Local Settings\Application Data\BronFoldNetDomList.txt • %HOME%\Local Settings\Application Data\Update.15.Bron.Tok.bin • %HOME%\Local Settings\Application Data\BronNetDomList.bat • %HOME%\Local Settings\Application Data\BronNPath0.txt The following files are created: – %HOME%\Local Settings\Application Data\BronNPath0.txt – %HOME%\Local Settings\Application Data\Kosong.Bron.Tok.txt – %HOME%\Local Settings\Application Data\ListHost15.txt – %HOME%\Local Settings\Application Data\BronFoldNetDomList.txt – %HOME%\Local Settings\Application Data\Update.15.Bron.Tok.bin – %HOME%\Local Settings\Application Data\Bron.tok.A15.em.bin – %HOME%\Local Settings\Application Data\BronNetDomList.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file. It tries to download some files: – The location is the following: • http://www.geocities.com/sbllma5/********** – The location is the following: • http://www.geocities.com/sbllma5/********** – The location is the following: • http://www.geocities.com/sbllma5/********** It tries to executes the following files: – Filename: • explorer.exe – Filename: • "%HOME%\Local Settings\Application Data\smss.exe" – Filename: • "%HOME%\Local Settings\Application Data\winlogon.exe" – Filename: • at /delete /y – Filename: • at 17:08 /every:M,T,W,Th,F,S,Su "%HOME%\Templates\Brengkolang.com" – Filename: • "%HOME%\Local Settings\Application Data\services.exe" – Filename: • "%HOME%\Local Settings\Application Data\lsass.exe" – Filename: • "%HOME%\Local Settings\Application Data\inetinfo.exe" – Filename: • cmd /c "%HOME%\Local Settings\Application Data\BronNetDomList.bat" – Filename: • ping kaskus.com -n 250 -l 747 Registry The following registry keys are added in order to run the processes after reboot: The following registry keys are added: – [HKLM\SOFTWARE\Classes\Interface\ {27636B00-410F-11CF-B1FF-02608C9E7553}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {32FB6780-1ED0-11CF-A988-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {32FB6780-1ED0-11CF-A988-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] • "NoFolderOptions"=dword:0x00000001 – [HKLM\SOFTWARE\Classes\Interface\ {398B7DA0-4AAB-11CF-AE2C-00AA006EBFB9}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {3E37E320-17E2-11CF-ABC4-02608C9E7553}] • "@"="IADsUser" – [HKLM\SOFTWARE\Classes\Interface\ {72B945E0-253B-11CF-A988-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {46F14FDA-232B-11D1-A808-00C04FD8D5A8}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {32FB6780-1ED0-11CF-A988-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {370DF02E-F934-11D2-BA96-00C04FB6D0D1}] • "@"="IADsDNWithString" – [HKLM\SOFTWARE\Classes\Interface\ {27636B00-410F-11CF-B1FF-02608C9E7553}] • "@"="IADsGroup" – [HKLM\SOFTWARE\Classes\Interface\ {5BB11929-AFD1-11D2-9CB9-0000F87A369E}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {28B96BA0-B330-11CF-A9AD-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {001677D0-FD16-11CE-ABC4-02608C9E7553}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {34A05B20-4AAB-11CF-AE2C-00AA006EBFB9}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {27636B00-410F-11CF-B1FF-02608C9E7553}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {124BE5C0-156E-11CF-A986-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {05792C8E-941F-11D0-8529-00C04FD8D503}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {46F14FDA-232B-11D1-A808-00C04FD8D5A8}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {46F14FDA-232B-11D1-A808-00C04FD8D5A8}] • "@"="IADsObjectOptions" – [HKLM\SOFTWARE\Classes\Interface\ {451A0030-72EC-11CF-B03B-00AA006E0975}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {5D7B33F0-31CA-11CF-A98A-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {72B945E0-253B-11CF-A988-00AA006BC149}] • "@"="IADsCollection" – [HKLM\SOFTWARE\Classes\Interface\ {34A05B20-4AAB-11CF-AE2C-00AA006EBFB9}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {451A0030-72EC-11CF-B03B-00AA006E0975}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {00E4C220-FD16-11CE-ABC4-02608C9E7553}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {68AF66E0-31CA-11CF-A98A-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {34A05B20-4AAB-11CF-AE2C-00AA006EBFB9}] • "@"="IADsResource" – [HKLM\SOFTWARE\Classes\Interface\ {306E831C-5BC7-11D1-A3B8-00C04FB950DC}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {05792C8E-941F-11D0-8529-00C04FD8D503}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {5BB11929-AFD1-11D2-9CB9-0000F87A369E}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {05792C8E-941F-11D0-8529-00C04FD8D503}] • "@"="IADsPropertyEntry" – [HKLM\SOFTWARE\Classes\Interface\ {306E831C-5BC7-11D1-A3B8-00C04FB950DC}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {00E4C220-FD16-11CE-ABC4-02608C9E7553}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {28B96BA0-B330-11CF-A9AD-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {124BE5C0-156E-11CF-A986-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {3E37E320-17E2-11CF-ABC4-02608C9E7553}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {5D7B33F0-31CA-11CF-A98A-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {370DF02E-F934-11D2-BA96-00C04FB6D0D1}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {6C6D65DC-AFD1-11D2-9CB9-0000F87A369E}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {28B96BA0-B330-11CF-A9AD-00AA006BC149}] • "@"="IADsNamespaces" – [HKLM\SOFTWARE\Classes\Interface\ {6C6D65DC-AFD1-11D2-9CB9-0000F87A369E}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {05792C8E-941F-11D0-8529-00C04FD8D503}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {5D7B33F0-31CA-11CF-A98A-00AA006BC149}] • "@"="IADsServiceOperations" – [HKLM\SOFTWARE\Classes\Interface\ {6C6D65DC-AFD1-11D2-9CB9-0000F87A369E}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {27636B00-410F-11CF-B1FF-02608C9E7553}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {3E37E320-17E2-11CF-ABC4-02608C9E7553}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {32FB6780-1ED0-11CF-A988-00AA006BC149}] • "@"="IADsPrintJob" – [HKLM\SOFTWARE\Classes\Interface\ {68AF66E0-31CA-11CF-A98A-00AA006BC149}] • "@"="IADsService" – [HKLM\SOFTWARE\Classes\Interface\ {5BB11929-AFD1-11D2-9CB9-0000F87A369E}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {68AF66E0-31CA-11CF-A98A-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {398B7DA0-4AAB-11CF-AE2C-00AA006EBFB9}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {451A0030-72EC-11CF-B03B-00AA006E0975}] • "@"="IADsMembers" – [HKLM\SOFTWARE\Classes\Interface\ {370DF02E-F934-11D2-BA96-00C04FB6D0D1}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {72B945E0-253B-11CF-A988-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {124BE5C0-156E-11CF-A986-00AA006BC149}] • "@"="IADsPrintQueueOperations" – [HKLM\SOFTWARE\Classes\Interface\ {306E831C-5BC7-11D1-A3B8-00C04FB950DC}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {6C6D65DC-AFD1-11D2-9CB9-0000F87A369E}] • "@"="IADsWinNTSystemInfo" – [HKLM\SOFTWARE\Classes\Interface\ {124BE5C0-156E-11CF-A986-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKCU\software\microsoft\windows\currentversion\Policies\System] • "DisableCMD"=dword:0x00000000 • "DisableRegistryTools"=dword:0x00000000 – [HKLM\SOFTWARE\Classes\Interface\ {001677D0-FD16-11CE-ABC4-02608C9E7553}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {306E831C-5BC7-11D1-A3B8-00C04FB950DC}] • "@"="IADsPropertyValue2" – [HKLM\SOFTWARE\Classes\Interface\ {398B7DA0-4AAB-11CF-AE2C-00AA006EBFB9}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {00E4C220-FD16-11CE-ABC4-02608C9E7553}] • "@"="IADsDomain" – [HKLM\SOFTWARE\Classes\Interface\ {001677D0-FD16-11CE-ABC4-02608C9E7553}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {5BB11929-AFD1-11D2-9CB9-0000F87A369E}] • "@"="IADsADSystemInfo" – [HKLM\SOFTWARE\Classes\Interface\ {46F14FDA-232B-11D1-A808-00C04FD8D5A8}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {72B945E0-253B-11CF-A988-00AA006BC149}\ProxyStubClsid] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {5D7B33F0-31CA-11CF-A98A-00AA006BC149}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {451A0030-72EC-11CF-B03B-00AA006E0975}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {3E37E320-17E2-11CF-ABC4-02608C9E7553}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {00E4C220-FD16-11CE-ABC4-02608C9E7553}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {398B7DA0-4AAB-11CF-AE2C-00AA006EBFB9}] • "@"="IADsSession" – [HKLM\SOFTWARE\Classes\Interface\ {001677D0-FD16-11CE-ABC4-02608C9E7553}] • "@"="IADsContainer" – [HKLM\SOFTWARE\Classes\Interface\ {28B96BA0-B330-11CF-A9AD-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {370DF02E-F934-11D2-BA96-00C04FB6D0D1}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" – [HKLM\SOFTWARE\Classes\Interface\ {68AF66E0-31CA-11CF-A98A-00AA006BC149}\TypeLib] • "@"="{97D25DB0-0363-11CF-ABC4-02608C9E7553}" • "Version"="1.0" – [HKLM\SOFTWARE\Classes\Interface\ {34A05B20-4AAB-11CF-AE2C-00AA006EBFB9}\ProxyStubClsid32] • "@"="{00020424-0000-0000-C000-000000000046}" The following registry keys are changed: – [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot] New value: • "AlternateShell"="cmd-brontok.exe" – [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] New value: • "Shell"="Explorer.exe "%WINDIR% \KesenjanganSosial.exe"" – [HKCU\Software\Microsoft\Internet Explorer\Toolbar\Explorer] New value: • "ITBarLayout"=hex:11,00,00,00,4C,00,00,00,00,00,00,00,34,00,00,00,1B,00,00,00,4E,00,00,00,01,00,00,00,20,07,00,00,A0,0F,00,00,05,00,00,00,62,05,00,00,26,00,00,00,02,00,00,00,21,07,00,00,A0,0F,00,00,04,00,00,00,21,01,00,00,A0,0F,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00 – [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced] New value: • "Hidden"=dword:0x00000000 • "HideFileExt"=dword:0x00000001 • "ShowSuperHidden"=dword:0x00000000 – [HKCU\Software\Microsoft\Internet Explorer\Toolbar] New value: • "Locked"=dword:0x00000001 Hosts The host file is modified as explained: – In this case existing entries are deleted. 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 Wednesday, June 23, 2010 Description updated by Petre Galan on Wednesday, June 23, 2010
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