Worm/SdBot.akv - Worm

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Statistici

Nume:	Worm/SdBot.akv
Descoperit pe data de:	17/11/2005
Tip:	Vierme
ITW:	Nu
Numar infectii raportate:	Scazut
Potential de raspandire:	Mediu
Potential de distrugere:	Mediu
Fisier static:	Da
Marime:	76.800 Bytes
MD5:	e4c3dcd460c2e4c898c65a59161c2d80
Versiune VDF:	6.36.01.45
Versiune IVDF:	6.36.01.48

General Metoda de raspandire:
   • Reteaua locala

Alias:
   • Kaspersky: Backdoor.Win32.SdBot.avd
   • TrendMicro: WORM_SDBOT.ALQ
   • Sophos: W32/Tilebot-HH

Initial identificat ca:
   • TR/Packed.CryptExe

Sistem de operare:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Efecte secundare:
   • Modificari in registri
   • Profita de vulnerabilitatile softului
   • Posibilitatea accesului neautorizat la computer

Fisiere Se copiaza in urmatoarea locatie:
• %SYSDIR%\lsyss.exe

Sterge copia initiala a virusului.

Registrii sistemului Urmatoarele chei sunt adaugate in registri pentru a incarca serviciul la repornirea sistemului:

– HKLM\SYSTEM\CurrentControlSet\Services\Windows Reg Service
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%SYSDIR%\lsyss.exe"
   • "DisplayName"="Windows Reg Service"
   • "ObjectName"="LocalSystem"
   • "FailureActions"=%hex value%
   • "Description"="Windows Reg Service"

Valorile urmatoarelor chei sunt sterse din registrii sistemului:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
   • "jda30"=%fisier executat%

– HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   ProxyEnable
– HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   ProxyServer
– HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   ProxyOverride
– HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
   AutoConfigURL

Urmatoarele chei sunt adaugate in registrii sistemului:

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions
   • "jda30"=%fisier executat%

– HKLM\SYSTEM\CurrentControlSet\Services\Windows Reg Service\Security
   • "Security"=%hex value%

– HKLM\SYSTEM\CurrentControlSet\Services\Windows Reg Service\Enum
   • "0"="Root\\LEGACY_WINDOWS_REG_SERVICE\\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_REG_SERVICE
   • "NextInstance"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_REG_SERVICE\
   0000
   • "Service"="Windows Reg Service"
   • "Legacy"=dword:00000001
   • "ConfigFlags"=dword:00000000
   • "Class"="LegacyDriver"
   • "ClassGUID"="{8ECC055D-047F-11D1-A537-0000F8753ED1}"
   • "DeviceDesc"="Windows Reg Service"

– HKLM\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_WINDOWS_REG_SERVICE\
   0000\Control
   • "*NewlyCreated*"=dword:00000000
   • "ActiveService"="Windows Reg Service"

– HKLM\SOFTWARE\Microsoft\Security Center
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001

– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
   • "EnableFirewall"=dword:00000000

– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
   • "EnableFirewall"=dword:00000000

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update
   • "AUOptions"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Services\wscsvc
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
   • "DoNotAllowXPSP2"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
   • "Start"=dword:00000004

– HKLM\SYSTEM\CurrentControlSet\Services\Messenger
   • "Start"=dword:00000004

Urmatoarele chei din registri sunt modificate:

– HKLM\SYSTEM\CurrentControlSet\Control
   Vechea valoare:
   • "WaitToKillServiceTimeout"="2000"
   Noua valoare:
   • "WaitToKillServiceTimeout"="7000"

– HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   Vechea valoare:
   • "restrictanonymous"=dword:00000000
   Noua valoare:
   • "restrictanonymous"=dword:00000001

– HKLM\SOFTWARE\Microsoft\Ole
   Vechea valoare:
   • "EnableDCOM"="Y"
   Noua valoare:
   • "EnableDCOM"="N"

Reţea Exploit:
Foloseste urmatoarele vulnerabilitati:
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-039 (Buffer Overrun in RPCSS Service)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)
– MS05-039 (Vulnerability in Plug and Play)

Procesul de infectare:
Se creeaza un script FTP in sistemul afectat, pentru a descarcaun malware pe alt computer controlat la distanta.

Activare de la distanta:
–Incearca sa activeze de la distanta malware-ul pe sistemul recent infectat. Pentru aceasta, apeleaza functia NetScheduleJobAdd.

IRC Pentru a trimite informatii si pentru a fi controlat se conecteaza la serverul IRC:

Server: x.realdot**********
Port: 8080
Parola serverului: master
Canal: #4.
Nick: [P00|USA|%sir de 5 caractere aleatoare%]
Parola: .....

– Acest malware poate obtine si trimite infomatii cum ar fi:
    • Timpul de cand malware-ul a fost lansat in executie
    • Informatii despre retea
    • Informatii despre procesele sistemului
    • Informatii despre sistemul de operare

– In plus, poate efectua urmatoarele operatii:
    • dezactivarea partajarii de resurse in retea
    • descarcare fisier
    • editare registru sistem
    • activarea partajarii de resurse in retea
    • terminare proces
    • deschidere consola
    • Scaneaza reteaua
    • oprierea sistemului
    • terminare proces malware

Terminarea proceselor Lista cu procesele oprite:
   • i11r54n4.exe; rate.exe; winsys.exe; irun4.exe; bbeagle.exe;
      d3dupdate.exe; teekids.exe; Penis32.exe; MSBLAST.exe;
      PandaAVEngine.exe; mscvb32.exe; ssate.exe; sysinfo.exe

Detaliile fisierului Compresia fisierului:
Pentru a ingreuna detectia si a reduce marimea fisierului, este folosit un program de compresie runtime.

Pentru o descriere scurta click aici.

Descriere introdusa de Bogdan Iliuta la Fri, 17 Nov 2006 10:27 (GMT+1)
Descriere actualizata de Bogdan Iliuta la Mon, 20 Nov 2006 14:17 (GMT+1)

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