Trojan.VBS.MISPADU.THIADBO
Windows
Threat Type:
Trojan
Destructiveness:
No
Encrypted:
No
In the wild::
Yes
OVERVIEW
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Detalles de entrada
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Instalación
Crea las carpetas siguientes:
- C:\{string2 from the decrypted response from url}
Otros detalles
Hace lo siguiente:
- It terminates itself when executed in a virtual environment whose computer name is "JOHN-PC" by checking for the following values:
- OS Model Name
- Virtual Machine - for Hyper V
- VMware Virtual Platform - for VMware
- VirtualBox - for Virtualbox
- BIOS Version
- Hyper-V 2008(Beta,RC0,RTM and R2)
- VS2005/VS2005R2/VS2005R2SP1
- VPC2004/VPC2007
- Windows Virtual PC
- Also terminates itself if the default installed OS language is not in the following list:
- Spanish – Spain (traditional)
- Portugese – Brazil
- Spanish – Mexico
- Spanish – Spain
- Spanish Microsoft Office Language – (Microsoft Office Language Value – LANGUAGE_SPANISH)
- Connects to the following url to download and execute malicious vbscript code in memory to check system and download more files:
- http://{BLOCKED}.{BLOCKED}7.173/gt21.php
- If C:\Users\Public\{string1 from the decrypted response from url}4.zip does not exist
- Connects and decrypts data from http://{BLOCKED}.{BLOCKED}7.173/k1oa.php
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/m/k1o{string3 from decrypted data from url}.gt2
- C:\Users\Public\{string1 from the decrypted response from url}4.zip
- If C:\Users\Public\{string1 from the decrypted response from url}1.zip does not exist
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/k1oa{string1 from the decrypted response from url}.gt2
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/k1oasq.gt2
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/k1oasl.gt2
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/k1oass.gt2
- Connects and downloads file from http://{BLOCKED}.{BLOCKED}7.173/k1oaai.gt2
- C:\Users\Public\{string1 from the decrypted response from url}sq.zip
- C:\Users\Public\{string1 from the decrypted response from url}sl.zip
- C:\Users\Public\{string1 from the decrypted response from url}ss.zip
- C:\Users\Public\{string1 from the decrypted response from url}ai.zip
- {string1 from the decrypted response from url} - detected as Trojan.AutoIt.MISPADO.THIADBO
- {string1 from the decrypted response from url}1.{reversed last 3 characters of string1} - detected as Trojan.Win32.MISPADO.THENC
- {string1 from the decrypted response from url}ai.exe - non-malicious AutoIt loader
- libeay32.dll – non-malicious libraries
- ssleay32.dll – non-malicious libraries
- winx86.dll – non-malicious libraries then deletes all the downloaded zip files
- C:\Users\Public\{second character of computer name}_
- strings from decrypted response from url
- created folder path
- hard-coded values from the script
- current date
- C:\Users\Public\{second character of computer name}
- {string1 from the decrypted response from url}ai.exe {string1 from the decrypted response from url} @1
- {string1 from the decrypted response from url}ai.exe {string1 from the decrypted response from url} ##1
- {string1 from the decrypted response from url}ai.exe {string1 from the decrypted response from url} ##3
SOLUTION
Step 2
Los usuarios de Windows ME y XP, antes de llevar a cabo cualquier exploración, deben comprobar que tienen desactivada la opción Restaurar sistema para permitir la exploración completa del equipo.
Step 3
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 4
Buscar y eliminar estos archivos
- C:\Users\Public\{decrypted string1 from url response}sq.zip
- C:\Users\Public\{decrypted string1 from url response}sl.zip
- C:\Users\Public\{decrypted string1 from url response}ss.zip
- C:\Users\Public\{decrypted string1 from url response}ai.zip
- C:\{decrypted string2 from url response}\{decrypted string1 from url response}
- C:\{decrypted string2 from url response}\{decrypted string1 from url response}1.{reversed last 3 characters of string1}
- C:\{decrypted string2 from url response}\{string1 from the decrypted response from url}ai.exe
- DATA_GENERIC
Step 5
Buscar y eliminar estas carpetas
- C:\{decrypted string2 from url response}
- DATA_GENERIC
Step 6
Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Trojan.VBS.MISPADU.THIADBO En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.
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