Worm/SdBot.571392.1 - Worm

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Statistici

Nume:	Worm/SdBot.571392.1
Descoperit pe data de:	20/02/2008
Tip:	Vierme
ITW:	Da
Numar infectii raportate:	Scazut
Potential de raspandire:	Mediu spre ridicat
Potential de distrugere:	Mediu
Fisier static:	Da
Marime:	571.392 Bytes
MD5:	672ebe523a7ebd0A884b5cb7d7dd3888
Versiune IVDF:	7.00.02.168

General Metode de raspandire:
   • Reteaua locala
   • Peer to Peer

Alias:
   • Mcafee: W32/Sdbot.worm
   • Kaspersky: Backdoor.Win32.SdBot.cqd
   • F-Secure: Backdoor.Win32.SdBot.cqd
   • Sophos: W32/Sdbot-DKD
   • Grisoft: IRC/BackDoor.SdBot3.YIN
   • Eset: IRC/SdBot
   • Bitdefender: Backdoor.SDBot.DFPJ

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

Efecte secundare:
   • Inchide aplicatiile de securitate
   • Reduce setarile de securitate
   • Modificari in registri
   • Profita de vulnerabilitatile softului
   • Sustrage informatii
   • Posibilitatea accesului neautorizat la computer

Fisiere Se copiaza in urmatoarea locatie:
• %WINDIR%\svchost.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\
   Generic Host Process for Win-32 Service]
   • Type = 110
   • Start = 2
   • ErrorControl = 0
   • ImagePath = %WINDIR%\svchost.exe
   • DisplayName = Generic Host Process for Win-32 Service
   • ObjectName = LocalSystem
   • FailureActions = %valori hex%
   • Description = Generic Host Process for Win-32 Service

– [HKLM\SYSTEM\CurrentControlSet\Services\
   Generic Host Process for Win-32 Service\Security]
   • Security = %valori hex%

Urmatoarele chei din registri sunt modificate:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions]
   Noua valoare:
   • %combinatie de caractere aleatoare% = %fisier executat%

– [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Vechea valoare:
   • shell = explorer.exe
   Noua valoare:
   • shell = explorer.exe %WINDIR%\svchost.exe

– [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Noua valoare:
   • sfcdisable = 1113997
   • sfcscan = 0

– [HKLM\Software\Microsoft\Security Center]
   Noua valoare:
   • antivirusdisablenotify = 1
   • antivirusoverride = 1
   • firewalldisablenotify = 1
   • firewalloverride = 1
   • updatesdisablenotify = 1

– [HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate]
   Noua valoare:
   • donotallowxpsp2 = 1

– [HKLM\Software\Symantec\LiveUpdate Admin]
   Noua valoare:
   • enterprise security manager = 1
   • ghost = 1
   • intruder alert = 1
   • liveadvisor = 1
   • liveupdate = 1
   • netrecon = 1
   • norton antivirus product updates = 1
   • norton antivirus virus definitions = 1
   • norton cleansweep = 1
   • norton commander = 1
   • norton internet security = 1
   • norton Systemworks = 1
   • norton utilities = 1
   • pc handyman and healthypc = 1
   • pcanywhere = 1
   • rescue disk = 1
   • symantec desktop firewall = 1
   • symantec gateway security ids = 1
   • symevent = 1

– [HKLM\System\CurrentControlSet\Services\wscsvc]
   Noua valoare:
   • start = 4

– [HKLM\Software\Microsoft\OLE]
   Noua valoare:
   • enabledcom = 78

– [HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update]
   Noua valoare:
   • auoptions = 1

– [HKLM\System\CurrentControlSet\Control\ServiceCurrent]
   Noua valoare:
   • @ = 9

– [HKLM\System\CurrentControlSet\Control]
   Noua valoare:
   • waittokillservicetimeout = 7000

– [HKLM\System\CurrentControlSet\Control\LSA]
   Noua valoare:
   • restrictanonymous = 1

– [HKLM\System\CurrentControlSet\Services\LanManServer\Parameters]
   Noua valoare:
   • autoshareserver = 0
   • autosharewks = 0

– [HKLM\System\CurrentControlSet\Services\LanManWorkstation\
   Parameters]
   Noua valoare:
   • autoshareserver = 0
   • autosharewks = 0

– [HKLM\System\CurrentControlSet\Services\Messenger]
   Noua valoare:
   • start = 4

– [HKLM\System\CurrentControlSet\Services\RemoteRegistry]
   Noua valoare:
   • start = 4

– [HKLM\System\CurrentControlSet\Services\tlntsvr]
   Noua valoare:
   • start = 4

Dezactiveaza Windows XP Firewall:
– [HKLM\Software\Policies\Microsoft\WindowsFirewall\DomainProfile]
   Noua valoare:
   • enablefirewall = 0

– [HKLM\Software\Policies\Microsoft\WindowsFirewall\StandardProfile]
   Noua valoare:
   • enablefirewall = 0

Dezactivarea programelor Regedit si Task Manager:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   Noua valoare:
   • disableregistrytools = 1
   • disabletaskmgr = 1

P2P Pentru a infecta alte sisteme din retele Peer-to-Peer, efectueaza urmatarele operatii:

– Extrage fisierul partajat, folosind urmatoarea cheie de registru:
• SOFTWARE\Kazaa\LocalContent\DownloadDir

Reţea Pentru a-si asigura raspandirea, programul malware incearca sa contacteze alte sisteme, asa cum este descris in continuare:

Exploit:
– MS02-061 (Elevation of Privilege in SQL Server Web)
– MS04-007 (ASN.1 Vulnerability)
–MS06-040 (Vulnerability in Server Service)

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

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

Server: www.worldcasino.to
Port: 80
Nick: [P00|USA|%numar%]

– Acest malware poate obtine si trimite infomatii cum ar fi:
    • Parole retinute
    • Viteza procesorului
    • Utilizatorul curent
    • Informatii despre drivere
    • Spatiu liber pe disc
    • Memorie nealocata
    • Timpul de cand malware-ul a fost lansat in executie
    • Informatii despre procesele sistemului
    • Cantitatea de memorie
    • Utilizator
    • Informatii despre sistemul de operare

– In plus, poate efectua urmatoarele operatii:
    • Lanseaza atacuri DDoS ICMP
    • Lanseaza atacuri DDoS SYN
    • Lanseaza atacuri DDoS UDP
    • dezactivarea partajarii de resurse in retea
    • descarcare fisier
    • editare registru sistem
    • activarea partajarii de resurse in retea
    • executarea unui fisier
    • intrare pe canal IRC
    • terminare proces
    • parasire canal IRC
    • deschidere consola
    • executare atac DDoS
    • Scaneaza reteaua
    • Porneste rutina de raspandire
    • terminare proces malware
    • terminare proces

Backdoor Servere contactate:
Unul dintre:
   • http://www2.dokidoki.ne.jp/tomocrus/cgi-bin/check/**********
   • http://www.kinchan.net/cgi-bin/**********
   • http://www.pistarnow.is.net.pl/**********
   • http://cgi.break.power.ne.jp/check/**********
   • http://www.proxy4free.info/cgi-bin/**********
   • http://69.59.137.236/cgi/**********
   • http://tutanchamon.ovh.org/**********
   • http://www.proxy.us.pl/**********
   • http://test.anonproxies.com/**********
   • http://www.nassc.com/**********
   • http://www.littleworld.pe.kr/**********
   • http://www.anonymitytest.com/cgi-bin/**********
   • http://tn0828-web.hp.infoseek.co.jp/cgi-bin/**********

Astfel se pot transmite informatii si se poate obtine control la distanta.

Furt de informatii Incearca sa obtina urmatoarele informatii:
– Parole stocate, folosite de functia AutoComplete
– Informatii despre contul de email, obtinute din cheia de registru: HKCU\SoftwareMicrosoft\Internet Account Manager\Accounts

Alte informatii Cauta o conexiune Internet, contactand urmatorul website:
   • www.google.com

Metode anti-debugging
Verfica daca ruleaza unul din urmatoarele programe:
   • Softice
   • Wine
   • FileMon
   • Regmon

Daca gaseste, isi termina executia imediat.
Daca reuseste, nu creeaza fisiere.

Modificare de fisiere:
Pentru a intrerupe Windows File Protection (WFP), poate modifica fisierul sfc_os.dll la 0000E2B8. WFP are ca scop evitarea problemelor cunoscute ce cauzeaza inconsistenta in DLL.

Detaliile fisierului Limbaj de programare:
Limbaj de programare folosit: C (compilat cu Microsoft Visual C++).

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 Andrei Gherman la Mon, 16 Jun 2008 10:18 (GMT+1)
Descriere actualizata de Robert Harja Iliescu la Thu, 24 Jul 2008 13:15 (GMT+1)

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