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TR/PSW.Small.BS.1 - Trojan
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Nume:
TR/PSW.Small.BS.1
Descoperit pe data de:
12/09/2006
Tip:
Troian
ITW:
Nu
Numar infectii raportate:
Scazut
Potential de raspandire:
Scazut
Potential de distrugere:
Mediu
Fisier static:
Da
Marime:
40.960 Bytes
MD5:
e749eb17826b0Ec9671d21be9160ab86
Versiune VDF:
6.35.01.216
Versiune IVDF:
6.35.01.220
General
Metoda de raspandire:
• Nu are rutina proprie de raspandire
Alias:
• Kaspersky: Trojan-PSW.Win32.Small.bs
• Sophos: Troj/PWS-HP
• Bitdefender: Trojan.PSW.Small.B
Sistem de operare:
• Windows 95
• Windows 98
• Windows 98 SE
• Windows NT
• Windows ME
• Windows 2000
• Windows XP
• Windows 2003
Efecte secundare:
• Creeaza un fisier
• Creeaza un fisier malware
• Modificari in registri
• Sustrage informatii
Fisiere
Se copiaza in urmatoarea locatie:
•
%WINDIR%
\9129837.exe
Sterge copia initiala a virusului.
Sunt create fisierele:
–
%WINDIR%
\hide_evr2.sys Analiza ulterioara a relevat ca si acest fisier este malware. Detectat ca: TR/PSW.Small.BS.3
–
%directorul de activare malware%
\a.bat Fisierul batch este folosit pentru stergerea unui fisier.
Registrii sistemului
Una din urmatoarele valori este adaugata in registri pentru pornirea automata a procesului dupa reboot:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
• "ttool"="
%WINDIR%
\9129837.exe"
Urmatoarele chei sunt adaugate in registri pentru a incarca serviciile la repornirea sistemului:
– [HKLM\SYSTEM\CurrentControlSet\Services\hide_evr2]
• "Type"=dword:00000001
"Start"=dword:00000003
"ErrorControl"=dword:00000000
"ImagePath"=\??\
%WINDIR%
\hide_evr2.sys
"DisplayName"="!!!!"
– [HKLM\SYSTEM\CurrentControlSet\Services\hide_evr2\Security]
• "Security"=
%valori hex%
– [HKLM\SYSTEM\CurrentControlSet\Services\hide_evr2\Enum]
• "0"="Root\\LEGACY_HIDE_EVR2\\0000"
"Count"=dword:00000001
"NextInstance"=dword:00000001
Se adauga in registrii sistemului:
– [HKCU\Software\Microsoft\InetData]
• "k1"=
%combinatie de caractere aleatoare%
• "k2"=
%combinatie de caractere aleatoare%
Backdoor
Deschide portul
port UDP aleator pentru a oferi functionalitate de backdoor.
Servere contactate:
Urmatoarele:
• http://81.95.147.107/cgi-bin/**********
• http://81.95.147.107/cgi-bin/**********
• http://81.95.147.107/cgi-bin/**********
• http://81.95.147.107/cgi-bin/**********
• http://81.95.147.107/cgi-bin/**********
Astfel se pot transmite informatii si se poate obtine control la distanta. Se foloseste metoda HTTP GET si POST printr-un script PHP.
Trimte informatii despre:
• Statusul actual al malware-ului
• Informatiile colectate, descrise in sectiunea
Furt de informatii
Incearca sa obtina urmatoarele informatii:
– Parole tastate in campuri de logare
– O rutina de logare este pornita dupa ce un site este vizitat:
•
%orice site care contine un formular de autentificare%
– Face captura la:
• Informatii legate de fereastra
• Fereastra browserului Internet
Tehnologie Rootkit
Ascunde urmatoarele:
– Propriile fisiere
– Propriul proces
– Propriile chei de registru
Metoda folosita:
• Ascuns de Windows API
Pentru o descriere scurta click
aici
.
Descriere introdusa de Marius T. Nicolae la Thu, 21 Sep 2006 10:27 (GMT+1)
Descriere actualizata de Andrei Ivanes la Thu, 19 Oct 2006 12:17 (GMT+1)
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