Nume:Worm/IM.Guap.a
Descoperit pe data de:22/08/2005
Tip:Vierme
ITW:Nu
Numar infectii raportate:Scazut
Potential de raspandire:Scazut spre mediu
Potential de distrugere:Scazut spre mediu
Fisier static:Da
Marime:57.344 Bytes
MD5:64B2695C0F8B25A89581C25618E2096B
Versiune VDF:6.31.1.154

 General Metoda de raspandire:
   • Messenger


Alias:
   •  Mcafee: W32/Generic.worm!p2p
   •  Kaspersky: IM-Worm.Win32.Guap.a
   •  Bitdefender: Win32.Worm.Guap.A


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


Efecte secundare:
   • Blocheaza accesul la anumite website-uri
   • Blocheaza accesul la website-uri ale firmelor de securitate
   • Reduce setarile de securitate
   • Modificari in registri

 Fisiere Se copiaza in urmatoarea locatie:
   • %SYSDIR%\pkguard32.exe



Este creat fisierul:

– %WINDIR%\hosts

 Registrii sistemului Urmatoarea cheie este adaugata in registri pentru a rula procesul la repornirea sistemului:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
   • PK Guard"="%SYSDIR%\pkguard32.exe"



Urmatoarele chei sunt adaugate in registri, in mod repetat, pentru a asigura pornirea procesului dupa reboot.

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • PK Guard"="%SYSDIR%\pkguard32.exe"

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • PK Guard"="%SYSDIR%\pkguard32.exe"



Urmatoarele chei din registri sunt modificate:

– [HKLM\SYSTEM\CurrentControlSet\Services\wuauserv]
   Vechea valoare:
   • "Start"=dword:00000002
   Noua valoare:
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess]
   Vechea valoare:
   • "Start"=dword:00000002
   Noua valoare:
   • "Start"=dword:00000004

 Messenger Se raspandeste prin messenger. Caracteristicile sunt:

– AIM Messenger
– Yahoo Messenger
– Windows Messenger


Catre:
Toate intrarile din lista de contacte.


Mesaj
Mesajul transmis este:

   • It repeatedly sends the following line to all of the user's contacts:
     Hehe, take a look at this funny game %link%


%link%
In timp ce wildcard-ul este:
   • http://**********games.yaboo.dk/Monkye.exe

URL-ul trimte la o copie a malware-ului descris. Daca utilizatorul descarca si executa acest fisier, procesul de infectare porneste din nou.

 Fisiere host Fisierul

– Accesul la urmatoarele domenii este blocat:
   • www.symantec.com; symantec.com; securityresponse.symantec.com;
      sarc.com; www.sarc.com; www.sophos.com; sophos.com; www.mcafee.com;
      mcafee.com; liveupdate.symantecliveupdate.com; www.viruslist.com;
      viruslist.com; f-secure.com; www.f-secure.com; f-prot.com;
      www.f-prot.com; kaspersky.com; kaspersky-labs.com; www.avp.com;
      avp.com; www.kaspersky.com; www.networkassociates.com;
      networkassociates.com; www.ca.com; ca.com; mast.mcafee.com;
      my-etrust.com; www.my-etrust.com; download.mcafee.com;
      dispatch.mcafee.com; secure.nai.com; nai.com; www.nai.com;
      vil.nai.com; update.symantec.com; updates.symantec.com; us.mcafee.com;
      liveupdate.symantec.com; customer.symantec.com; rads.mcafee.com;
      trendmicro.com; www.trendmicro.com; housecall.trendmicro.com;
      pandasoftware.com; www.pandasoftware.com; www.trendmicro.com;
      free.grisoft.com; www.grisoft.com; grisoft.com; clamav.net;
      www.clamav.net; free-av.com; www.free-av.com; www.avast.com;
      avast.com; cert.org; www.cert.org; www.microsoft.com; microsoft.com;
      www.virustotal.com; virustotal.com; update.microsoft.com;
      windowsupdate.microsoft.com




Fisierul hosts modificat va arata astfel:


 Terminarea proceselor  Lista cu serviciile dezactivate:
   • Internet Connection Firewall (ICF) / Internet Connection Sharing (ICS)
   • Automatic Updates

 Backdoor Deschide portul

– %SYSDIR%\pkguard32.exe port UDP aleator

 Detaliile fisierului Limbaj de programare:
 Limbaj de programare folosit: Visual Basic.

Descrizione inserita da Andrei Gherman su martedì 23 agosto 2005
Descrizione aggiornata da Oliver Auerbach su mercoledì 7 settembre 2005

Indietro . . . .