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Virus:Worm/Conficker.gen
Date discovered:30/09/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:No
IVDF version:7.10.12.90 - Thursday, September 30, 2010

 General Methods of propagation:
    Autorun feature
   • Local network


Aliases:
   •  Mcafee: W32/Conficker.worm
   •  Panda: W32/Conficker.C.worm
   •  Eset: Win32/Conficker.AA


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


Side effects:
   • Lowers security settings
   • Drops malicious files
   • Registry modification
   • Makes use of software vulnerability
        CVE-2007-1204
        MS07-019

 Files It copies itself to the following locations:
   • %SYSDIR%\qepdjla.dll
   • %drive%\RECYCLER\%CLSID%\jwgkvsq.vmx



It deletes the initially executed copy of itself.



The following file is created:

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




It tries to execute the following file:

Filename:
   • explorer C:

 Registry The following registry keys are added in order to load the service after reboot:

[HKLM\SYSTEM\CurrentControlSet\Services\
   %random character string%]
   • "ErrorControl"=dword:0x00000000
   • "ImagePath"="%SystemRoot%\system32\svchost.exe -k netsvcs"
   • "ObjectName"="LocalSystem"
   • "Start"=dword:0x00000002
   • "Type"=dword:0x00000020



The value of the following registry key is removed:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • Windows Defender



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

[HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\GloballyOpenPorts\List]
   • "8182:TCP"="8182:TCP:*:Enabled:opijcn"



The following registry key is added:

[HKLM\SYSTEM\CurrentControlSet\Services\
   %random character string%\Parameters]
   • "ServiceDll"="%SYSDIR%\qepdjla.dll"



The following registry keys are changed:

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

[HKCU\Software\Microsoft\Internet Explorer\Toolbar]
   New value:
   • "Locked"=dword:0x00000001

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "DontPrettyPath"=dword:0x00000000
   • "Filter"=dword:0x00000000
   • "Hidden"=dword:0x00000002
   • "HideFileExt"=dword:0x00000000
   • "HideIcons"=dword:0x00000000
   • "MapNetDrvBtn"=dword:0x00000001
   • "SeparateProcess"=dword:0x00000001
   • "ShowCompColor"=dword:0x00000001
   • "ShowInfoTip"=dword:0x00000000
   • "SuperHidden"=dword:0x00000000
   • "WebView"=dword:0x00000000

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost]
   New value:
   • "netsvcs"="6to4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000000

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.


It uses the following login information in order to gain access to the remote machine:

The following list of passwords:
   • 99999999; 9999999; 999999; 99999; 9999; 999; 99; 88888888; 8888888;
      888888; 88888; 8888; 888; 88; 77777777; 7777777; 777777; 77777; 7777;
      777; 77; 66666666; 6666666; 666666; 66666; 6666; 666; 66; 55555555;
      5555555; 555555; 55555; 5555; 555; 55; 44444444; 4444444; 444444;
      44444; 4444; 444; 44; 33333333; 3333333; 333333; 33333; 3333; 333; 33;
      22222222; 2222222; 222222; 22222; 2222; 222; 22; 11111111; 1111111;
      111111; 11111; 1111; 111; 11; 00000000; 0000000; 00000; 0000; 000; 00;
      0987654321; 987654321; 87654321; 7654321; 654321; 54321; 4321; 321;
      21; 12; fuck; zzzzz; zzzz; zzz; xxxxx; xxxx; xxx; qqqqq; qqqq; qqq;
      aaaaa; aaaa; aaa; sql; file; web; foo; job; home; work; intranet;
      controller; killer; games; private; market; coffee; cookie; forever;
      freedom; student; account; academia; files; windows; monitor; unknown;
      anything; letitbe; letmein; domain; access; money; campus; explorer;
      exchange; customer; cluster; nobody; codeword; codename; changeme;
      desktop; security; secure; public; system; shadow; office; supervisor;
      superuser; share; super; secret; server; computer; owner; backup;
      database; lotus; oracle; business; manager; temporary; ihavenopass;
      nothing; nopassword; nopass; Internet; internet; example; sample;
      love123; boss123; work123; home123; mypc123; temp123; test123; qwe123;
      abc123; pw123; root123; pass123; pass12; pass1; admin123; admin12;
      admin1; password123; password12; password1; default; foobar; foofoo;
      temptemp; temp; testtest; test; rootroot; root; adminadmin;
      mypassword; mypass; pass; Login; login; Password; password; passwd;
      zxcvbn; zxcvb; zxccxz; zxcxz; qazwsxedc; qazwsx; q1w2e3; qweasdzxc;
      asdfgh; asdzxc; asddsa; asdsa; qweasd; qwerty; qweewq; qwewq; nimda;
      administrator; Admin; admin; a1b2c3; 1q2w3e; 1234qwer; 1234abcd;
      123asd; 123qwe; 123abc; 123321; 12321; 123123; 1234567890; 123456789;
      12345678; 1234567; 123456; 12345; 1234; 123



Exploit:
It makes use of the following Exploits:
– MS04-007 (ASN.1 Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)
 MS06-040 (Vulnerability in Server Service)


Remote execution:
It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

 Injection – It injects a backdoor routine into a process.

    Process name:
   • svchost.exe


 Miscellaneous  Checks for an internet connection by contacting the following web sites:
   • http://checkip.dyndns.org
   • http://www.whatismyip.org


Mutex:
It creates the following Mutexes:
   • %random character string%
   • %random character string%
   • dvkwjdesgb

 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 Friday, December 3, 2010
Description updated by Andrei Ivanes on Friday, December 10, 2010

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