Worm/Brontok.N.1 - Worm

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Scurta descriere

Descriere completa

Statistici

Nume:	Worm/Brontok.N.1
Descoperit pe data de:	25/03/2006
Tip:	Vierme
ITW:	Nu
Numar infectii raportate:	Scazut
Potential de raspandire:	Mediu
Potential de distrugere:	Mediu
Fisier static:	Da
Marime:	43.520 Bytes
MD5:	077fc28e71343d70bf08958b641be113
Versiune VDF:	6.34.00.97
Versiune IVDF:	6.34.00.97

General Metoda de raspandire:
   • Email

Alias:
   • Symantec: W32.Rontokbro.U@mm
   • Kaspersky: Email-Worm.Win32.Brontok.n
   • TrendMicro: WORM_RONTOKBR.AT
   • Sophos: W32/Brontok-AE
   • Bitdefender: Win32.Brontok.AF@mm

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
   • Inchide aplicatiile de securitate
   • Descarca fisiere
   • Utilizeaza propriul motor de email
   • Reduce setarile de securitate
   • Modificari in registri

Imediat dupa lansarea in executie, pe ecran este afisat:

Fisiere Se copiaza in urmatoarele locatii:
   • %home%\Local Settings\Application Data\dv%cateva numere aleatoare de la 0 la 9%x\yesbron.com
   • %SYSDIR%\c_%cateva numere aleatoare de la 0 la 9%k.com
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\csrss.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\smss.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\winlogon.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\services.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\sv%cateva numere aleatoare de la 0 la 9%.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\b%cateva numere aleatoare de la 0 la 9%.exe
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\ib%cateva numere aleatoare de la 0 la 9%.exe
   • %WINDIR%\j%cateva numere aleatoare de la 0 la 9%.exe
   • %WINDIR%\o%cateva numere aleatoare de la 0 la 9%.exe
   • %WINDIR%\_default%cateva numere aleatoare de la 0 la 9%.pif
   • %home%\Local Settings\Application Data\jalak-%cateva numere aleatoare de la 0 la 9%-bali.com

Creeaza urmatoarele directoare:
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\Spread.Mail.Bro
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\Spread.Sent.Bro
   • %home%\Local Settings\Application Data\dv%cateva numere aleatoare de la 0 la 9%x

Sunt create fisierele:

– Fisiere care contin adrese de email:
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\Spread.Mail.Bro\%adrese de email culese din sistem%.ini
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\Spread.Sent.Bro\%adrese de email culese din sistem%.ini

– Fisiere temporare care pot fi sterse dupa aceea:
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\domlist.txt
   • %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\getdomlist.txt

– %radacina partitiei Windows%\Baca Bro !!!.txt Acesta este un fisier text care nu prezinta pericol si are urmatorul continut:
   • BRONTOK.C[22]
     Sedikit Jawaban u/ Membungkam Mulut Sesumbar 'MEREKA'.
     Nobron = Satria Dungu = Nothing !!!
     Romdil = Tukang Jiplak = Nothing !!!
     Nobron & Romdil -->> Kicked by The Amazing Brontok
     [ By JowoBot ]

– %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\c.bron.tok.txt Acesta este un fisier text care nu prezinta pericol si are urmatorul continut:
   • Brontok.C
     By:JowoBot

– %WINDIR%\tasks\at1.job Fisierul este o activitate programata care ruleaza malware-ul la ore predefinite.
– %WINDIR%\tasks\at2.job Fisierul este o activitate programata care ruleaza malware-ul la ore predefinite.

Incearca sa descarce cateva fisiere:

– Adresa este urmatoarea:
   • http://www.net4free.org/Arts/bddwyrk/**********
Fisierul este stocat pe hard disc la: %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\sv%cateva numere aleatoare de la 0 la 9%r.exeupi22xbm.ini

– Adresa este urmatoarea:
   • http://debuging.com/WS1/cgi/**********
Fisierul este stocat pe hard disc la: %SYSDIR%\n%cateva numere aleatoare de la 0 la 9%\svt%numar%sj.tok

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "A%cateva numere aleatoare de la 0 la 9%r"="%WINDIR%\j%cateva numere aleatoare de la 0 la 9%.exe"

Valorile urmatoarelor chei sunt sterse din registrii sistemului:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • Adie Suka Kamu
   • Adie Strio X
   • SysYuni
   • SysDiaz
   • Sys_Romantic-Devil.R
   • SysRia
   • Pluto
   • DllHost
   • iExplorer
   • lExplorer
   • dkernel.exe
   • dkernel
   • Security
   • local service
   • SymRun
   • OSA
   • ccapp
   • CCAPPS
   • LoadServices
   • LoadService
   • MsPatch
   • Bron-Spizaetus-
   • Bron-Spizaetus-4713XPPM

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • Tok-Cirrhatus
   • Tok-Cirrhatus-%cateva numere aleatoare de la 0 la 9%adrc
   • Tok-Cirrhatus-%cateva numere aleatoare de la 0 la 9%

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   • NoFolderOptions

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\
   run]
   • Tok-Cirrhatus-%cateva numere aleatoare de la 0 la 9%adrc
   • brl

Urmatoarele chei sunt adaugate in registrii sistemului:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\
   run]
   • "y%cateva numere aleatoare de la 0 la 9%adr"="%user settings%\Application Data\dv%cateva numere aleatoare de la 0 la 9%x\yesbron.com"

– [HKCU\Software\Brontok]
   • "Version"="Brontok.C[22]"
   • "Developer"="JowoBot
   • VM Community"
   • "Released"="09-03-06"
   • "Message"=Look @ "C:\Baca Bro !!!.txt"
   • "Dedicated 2"="Spizaetus Cirrhatus"

Urmatoarele chei din registri sunt modificate:

Dezactivarea programelor Regedit si Task Manager:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   Vechea valoare:
   • "DisableRegistryTools"=%setarile utilizatorului%
   Noua valoare:
   • "DisableRegistryTools"=dword:00000001

Diverse setari in Explorer:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Vechea valoare:
   • "Hidden"=%setarile utilizatorului%
   • "HideFileExt"=%setarile utilizatorului%
   • "ShowSuperHidden"=%setarile utilizatorului%
   Noua valoare:
   • "Hidden"=dword:00000000
   • "HideFileExt"=dword:00000001
   • "ShowSuperHidden"=dword:00000000

– [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot]
   Vechea valoare:
   • "AlternateShell"="cmd.exe"
   Noua valoare:
   • "AlternateShell"="c_%cateva numere aleatoare de la 0 la 9%k.com"

– [HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Vechea valoare:
   • "Shell"="Explorer.exe"
     "Userinit"="%SYSDIR%\userinit.exe"
   Noua valoare:
   • "Shell"=Explorer.exe "%WINDIR%\o%cateva numere aleatoare de la 0 la 9%.exe"
     "Userinit"="%SYSDIR%\userinit.exe,%WINDIR%\j%cateva numere aleatoare de la 0 la 9%.exe"

Email Are un motor SMTP integrat. Va fi facuta o conexiune directa cu serverul destinatar. Iata caracteristicile lui:

De la:
Expeditorul email-ului este unul din urmatorii:
   • jennifer_sh@%domeniul destinatarului din adresa de email%
   • angelina_ph@%domeniul destinatarului din adresa de email%

Catre:
– Adrese de email gasite pe sistem.
– Adrese generate

Subiect:
Unul din urmatoarele:
   • My Best Photo
   • Fotoku yg Paling Cantik

Corpul email-ului:
Corpul email-ului este unul din textele:

   • I want to share my photo with you.
     Wishing you all the best.
     Regards,

   • Aku lg iseng aja pengen kirim foto ke kamu.
     Jangan lupain aku ya !.
     Thanks,

Atasament:
Fisierul nu contine o copie ci chiar un alt malware. Descriere: TR/Dldr.Small.coc.1

Numele fisierului atasat este urmatorul:
   • Picture.zip

Email-ul arata astfel:

Email Cautare adrese:
Cauta adrese de email in urmatoarele fisiere:
   • PPT; XLS; CFM; PHP; ASP; WAB; EML; CSV; HTML; HTM; DOC; TXT

Adrese evitate:
Nu trimite email-uri la adrese care contin unul din urmatoarele siruri de caractere:
   • BILLING@; INFO@; CONTOH; EXAMPLE; SMTP; XXX; TEST; NETWORK; SOURCE;
      PROGRAM; WWW; ASDF; SOME; YOUR; BLAH; SPAM; SOFT; PANDA; NORMAN;
      NORTON; ASSOCIATE; SYMANTEC; SECURITY; CILLIN; GRISOFT; AVG; LINUX;
      CRACK; HACK; VIRUS; MICROSOFT; MASTER; SUPPORT; SECURE; UPDATE;
      DEVELOP; VAKSIN; SATU; EMAILKU; BOLEH; GAUL; ASTAGA; .WEB.ID; .AC.ID;
      .OR.ID; .NET.ID; .SCH.ID; .MIL.ID; .GO.ID; .CO.ID; INDO; TELKOM; PLASA


Server MX:
Se poate conecta la unul dintre serverele MX:
   • ns1.
   • mail.
   • smtp.

Fisiere host Fisierul

– In acest caz, inregistrarile existente sunt sterse.

– Accesul la urmatoarele domenii este blocat:
   • mcafee.com; www.mcafee.com; mcafee.net; www.mcafee.net; mcafee.org;
      www.mcafee.org; mcafeesecurity.com; www.mcafeesecurity.com;
      mcafeesecurity.net; www.mcafeesecurity.net; mcafeesecurity.org;
      www.mcafeesecurity.org; mcafeeb2b.com; www.mcafeeb2b.com;
      mcafeeb2b.net; www.mcafeeb2b.net; mcafeeb2b.org; www.mcafeeb2b.org;
      nai.com; www.nai.com; nai.net; www.nai.net; nai.org; www.nai.org;
      vil.nai.com; www.vil.nai.com; vil.nai.net; www.vil.nai.net;
      vil.nai.org; www.vil.nai.org; grisoft.com; www.grisoft.com;
      grisoft.net; www.grisoft.net; grisoft.org; www.grisoft.org;
      kaspersky-labs.com; www.kaspersky-labs.com; kaspersky-labs.net;
      www.kaspersky-labs.net; kaspersky-labs.org; www.kaspersky-labs.org;
      kaspersky.com; www.kaspersky.com; kaspersky.net; www.kaspersky.net;
      kaspersky.org; www.kaspersky.org; downloads1.kaspersky-labs.com;
      www.downloads1.kaspersky-labs.com; downloads1.kaspersky-labs.net;
      www.downloads1.kaspersky-labs.net; downloads1.kaspersky-labs.org;
      www.downloads1.kaspersky-labs.org; downloads2.kaspersky-labs.com;
      www.downloads2.kaspersky-labs.com; downloads2.kaspersky-labs.net;
      www.downloads2.kaspersky-labs.net; downloads2.kaspersky-labs.org;
      www.downloads2.kaspersky-labs.org; downloads3.kaspersky-labs.com;
      www.downloads3.kaspersky-labs.com; downloads3.kaspersky-labs.net;
      www.downloads3.kaspersky-labs.net; downloads3.kaspersky-labs.org;
      www.downloads3.kaspersky-labs.org; downloads4.kaspersky-labs.com;
      www.downloads4.kaspersky-labs.com; downloads4.kaspersky-labs.net;
      www.downloads4.kaspersky-labs.net; downloads4.kaspersky-labs.org;
      www.downloads4.kaspersky-labs.org; download.mcafee.com;
      www.download.mcafee.com; download.mcafee.net; www.download.mcafee.net;
      download.mcafee.org; www.download.mcafee.org; norton.com;
      www.norton.com; norton.net; www.norton.net; norton.org;
      www.norton.org; symantec.com; www.symantec.com; symantec.net;
      www.symantec.net; symantec.org; www.symantec.org;
      liveupdate.symantecliveupdate.com;
      www.liveupdate.symantecliveupdate.com;
      liveupdate.symantecliveupdate.net;
      www.liveupdate.symantecliveupdate.net;
      liveupdate.symantecliveupdate.org;
      www.liveupdate.symantecliveupdate.org; liveupdate.symantec.com;
      www.liveupdate.symantec.com; liveupdate.symantec.net;
      www.liveupdate.symantec.net; liveupdate.symantec.org;
      www.liveupdate.symantec.org; update.symantec.com;
      www.update.symantec.com; update.symantec.net; www.update.symantec.net;
      update.symantec.org; www.update.symantec.org;
      securityresponse.symantec.com; www.securityresponse.symantec.com;
      securityresponse.symantec.net; www.securityresponse.symantec.net;
      securityresponse.symantec.org; www.securityresponse.symantec.org;
      sarc.com; www.sarc.com; sarc.net; www.sarc.net; sarc.org;
      www.sarc.org; vaksin.com; www.vaksin.com; vaksin.net; www.vaksin.net;
      vaksin.org; www.vaksin.org; forum.vaksin.com; www.forum.vaksin.com;
      forum.vaksin.net; www.forum.vaksin.net; forum.vaksin.org;
      www.forum.vaksin.org; norman.com; www.norman.com; norman.net;
      www.norman.net; norman.org; www.norman.org; trendmicro.com;
      www.trendmicro.com; trendmicro.net; www.trendmicro.net;
      trendmicro.org; www.trendmicro.org; trendmicro-europe.com;
      www.trendmicro-europe.com; trendmicro-europe.net;
      www.trendmicro-europe.net; trendmicro-europe.org;
      www.trendmicro-europe.org; ae.trendmicro-europe.com;
      www.ae.trendmicro-europe.com; ae.trendmicro-europe.net;
      www.ae.trendmicro-europe.net; ae.trendmicro-europe.org;
      www.ae.trendmicro-europe.org; it.trendmicro-europe.com;
      www.it.trendmicro-europe.com; it.trendmicro-europe.net;
      www.it.trendmicro-europe.net; it.trendmicro-europe.org;
      www.it.trendmicro-europe.org; secunia.com; www.secunia.com;
      secunia.net; www.secunia.net; secunia.org; www.secunia.org;
      winantivirus.com; www.winantivirus.com; winantivirus.net;
      www.winantivirus.net; winantivirus.org; www.winantivirus.org;
      pandasoftware.com; www.pandasoftware.com; pandasoftware.net;
      www.pandasoftware.net; pandasoftware.org; www.pandasoftware.org;
      esafe.com; www.esafe.com; esafe.net; www.esafe.net; esafe.org;
      www.esafe.org; f-secure.com; www.f-secure.com; f-secure.net;
      www.f-secure.net; f-secure.org; www.f-secure.org; europe.f-secure.com;
      www.europe.f-secure.com; europe.f-secure.net; www.europe.f-secure.net;
      europe.f-secure.org; www.europe.f-secure.org; bhs.com; www.bhs.com;
      bhs.net; www.bhs.net; bhs.org; www.bhs.org; datafellows.com;
      www.datafellows.com; datafellows.net; www.datafellows.net;
      datafellows.org; www.datafellows.org; cheyenne.com; www.cheyenne.com;
      cheyenne.net; www.cheyenne.net; cheyenne.org; www.cheyenne.org;
      ontrack.com; www.ontrack.com; ontrack.net; www.ontrack.net;
      ontrack.org; www.ontrack.org; sands.com; www.sands.com; sands.net;
      www.sands.net; sands.org; www.sands.org; sophos.com; www.sophos.com;
      sophos.net; www.sophos.net; sophos.org; www.sophos.org; icubed.com;
      www.icubed.com; icubed.net; www.icubed.net; icubed.org;
      www.icubed.org; perantivirus.com; www.perantivirus.com;
      perantivirus.net; www.perantivirus.net; perantivirus.org;
      www.perantivirus.org; castlecops.com; www.castlecops.com;
      castlecops.net; www.castlecops.net; castlecops.org;
      www.castlecops.org; virustotal.com; www.virustotal.com;
      virustotal.net; www.virustotal.net; virustotal.org;
      www.virustotal.org; free-av.com; www.free-av.com; free-av.net;
      www.free-av.net; free-av.org; www.free-av.org; antivirus.com;
      www.antivirus.com; antivirus.net; www.antivirus.net; antivirus.org;
      www.antivirus.org; anti-virus.com; www.anti-virus.com; anti-virus.net;
      www.anti-virus.net; anti-virus.org; www.anti-virus.org; ca.com;
      www.ca.com; ca.net; www.ca.net; ca.org; www.ca.org; fajarweb.com;
      www.fajarweb.com; fajarweb.net; www.fajarweb.net; fajarweb.org;
      www.fajarweb.org; jasakom.com; www.jasakom.com; jasakom.net;
      www.jasakom.net; jasakom.org; www.jasakom.org; backup.grisoft.com;
      www.backup.grisoft.com; backup.grisoft.net; www.backup.grisoft.net;
      backup.grisoft.org; www.backup.grisoft.org; infokomputer.com;
      www.infokomputer.com; infokomputer.net; www.infokomputer.net;
      infokomputer.org; www.infokomputer.org; playboy.com; www.playboy.com;
      playboy.net; www.playboy.net; playboy.org; www.playboy.org;
      sex-mission.com; www.sex-mission.com; sex-mission.net;
      www.sex-mission.net; sex-mission.org; www.sex-mission.org;
      pornstargals.com; www.pornstargals.com; pornstargals.net;
      www.pornstargals.net; pornstargals.org; www.pornstargals.org;
      kaskus.com; www.kaskus.com; kaskus.net; www.kaskus.net; kaskus.org;
      www.kaskus.org; 17tahun.com; www.17tahun.com; 17tahun.net;
      www.17tahun.net; 17tahun.org; www.17tahun.org; padinet.com;
      www.padinet.com; padinet.net; www.padinet.net; padinet.org;
      www.padinet.org; jeruk.padinet.com; www.jeruk.padinet.com;
      jeruk.padinet.net; www.jeruk.padinet.net; jeruk.padinet.org;
      www.jeruk.padinet.org; compactbyte.com; www.compactbyte.com;
      compactbyte.net; www.compactbyte.net; compactbyte.org;
      www.compactbyte.org; blog.compactbyte.com; www.blog.compactbyte.com;
      blog.compactbyte.net; www.blog.compactbyte.net; blog.compactbyte.org;
      www.blog.compactbyte.org; blogs.compactbyte.com;
      www.blogs.compactbyte.com; blogs.compactbyte.net;
      www.blogs.compactbyte.net; blogs.compactbyte.org;
      www.blogs.compactbyte.org

Fisierul hosts modificat va arata astfel:

Terminarea proceselor Procesele care contin urmatoarele siruri de caractere sunt oprite:
   • ahnlab; peid; nod32; hijack; sysinter; aladdin; panda; trend; cillin;
      mcaf; avast; bitdef; machine; movzx; kill; washer; remove; wscript;
      diary; untukmu; kangen; sstray; Alicia; Mariana; Dian; foto; zlh;
      Anti; mspatch; siti; virus; services.com; ctfmon; nopdb; opscan;
      vptray; update; lexplorer; iexplorer; nipsvc; njeeves; cclaw; nvcoas;
      aswupdsv; ashmaisv; systray; riyani; xpshare; syslove; tskmgr; ccapps;
      ash; avg; poproxy; mcv

Processes containing the following window title (ro)
   • peid; task view; telanjang; bugil; cewe; naked; porn; sex; alwil;
      wintask; folder option; b.e; worm; trojan; avira; windows script;
      commander; pc-media; killer; ertanto; anti; CLEANER; REMOVER; PROCESS
      EXP; SYSINTERNAL; killbox; scheduled task; computer management;
      cmd.exe; group policy; system configuration; command prompt; registry;
      baca bro !!!; task manager; google.com; up22ngk

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 Adriana Popa la Tue, 25 Jul 2006 13:01 (GMT+1)
Descriere actualizata de Andrei Gherman la Wed, 26 Jul 2006 17:09 (GMT+1)

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