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Virus:Worm/Confic.1269760
Date discovered:12/02/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:Yes
File size:1.269.760 Bytes
MD5 checksum:6ce65eea05ae7fc659a455b5e1589ab0
IVDF version:7.10.04.44 - Friday, February 12, 2010

 General Methods of propagation:
   • Autorun feature
   • Local network


Aliases:
   •  Sophos: Mal/Conficker-A
   •  Panda: W32/Conficker.C.worm
   •  Eset: Win32/Conficker.X


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


Side effects:
   • Drops malicious files
   • Lowers security settings
   • 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%]
   • "Description"="Enables a computer to recognize and adapt to hardware changes with little or no user input. Stopping or disabling this service will result in system instability."
   • "DisplayName"="Driver Shell"
   • "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:

– [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\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000000

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

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer]
   New value:
   • "ShellState"=hex:24,00,00,00,32,04,00,00,00,00,00,00,00,00,00,00,00,00,00,00,01,00,00,00,0D,00,00,00,00,00,00,00,01,00,00,00

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

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.
– 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)
– 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 site:
   • http://checkip.dyndns.org


Mutex:
It creates the following Mutexes:
   • vcxhnoiftekm
   • dvkwjdesgb
   • gjhwvfiuyabd

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Descrizione inserita da Petre Galan su mercoledì 8 dicembre 2010
Descrizione aggiornata da Andrei Ivanes su giovedì 9 dicembre 2010

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