Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/09/2024, 08:24

General

  • Target
    1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe
  • Size 547KB
  • Sample240930-kap1vavdpn
  • SHA256 295a6bc83e47df3e4ab6349a145c43b464590c91c0a8abb3f9a8cf5df08bab83
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • vipkeylogger

Credentials

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • VIPKeylogger

    VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.

  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 6 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe
    "C:\Users\Admin\AppData\Local\Temp\1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3000
    • \??\c:\users\admin\appdata\local\temp\1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe 
      c:\users\admin\appdata\local\temp\1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe 
      2⤵
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1204
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1204 -s 1148
        3⤵
        • Program crash
        PID:4036
    • C:\Users\Admin\AppData\Local\icsys.icn.exe
      C:\Users\Admin\AppData\Local\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3856
      • \??\c:\windows\system\explorer.exe
        c:\windows\system\explorer.exe
        3⤵
        • Modifies WinLogon for persistence
        • Modifies visiblity of hidden/system files in Explorer
        • Boot or Logon Autostart Execution: Active Setup
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1688
        • \??\c:\windows\system\spoolsv.exe
          c:\windows\system\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4628
          • \??\c:\windows\system\svchost.exe
            c:\windows\system\svchost.exe
            5⤵
            • Modifies WinLogon for persistence
            • Modifies visiblity of hidden/system files in Explorer
            • Boot or Logon Autostart Execution: Active Setup
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in Windows directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1800
            • \??\c:\windows\system\spoolsv.exe
              c:\windows\system\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:2840
            • C:\Windows\SysWOW64\at.exe
              at 08:26 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:2216
            • C:\Windows\SysWOW64\at.exe
              at 08:27 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:4436
            • C:\Windows\SysWOW64\at.exe
              at 08:28 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:4640
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1204 -ip 1204
    1⤵
      PID:4708

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe 

          • Path C:\Users\Admin\AppData\Local\Temp\1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe 
          • Size 272KB
          • SHA256 96134c810750cc56e372551f8070f06aee80ae0cc8eeac983502d6b8f66c77df
          • MD5 SHA1 SHA512 SSDEEP

          icsys.icn.exe

          • Path C:\Users\Admin\AppData\Local\icsys.icn.exe
          • Size 274KB
          • SHA256 70924977c57603c3f4f891951795650c96343308fff9ca30bff0140409c7d30c
          • MD5 SHA1 SHA512 SSDEEP

          mrsys.exe

          • Path C:\Users\Admin\AppData\Roaming\mrsys.exe
          • Size 274KB
          • SHA256 cd7b5c721c80eaf5d9f19b5e1aaa2d1917d460b1748ff27eb48c327991a100ad
          • MD5 SHA1 SHA512 SSDEEP

          explorer.exe

          • Path C:\Windows\System\explorer.exe
          • Size 274KB
          • SHA256 40ee49c3ddf1e4d4e760b296926c30458a750d2ef4ea0b79a25843d11cf9d50d
          • MD5 SHA1 SHA512 SSDEEP

          spoolsv.exe

          • Path C:\Windows\System\spoolsv.exe
          • Size 274KB
          • SHA256 fdf5099745ba4672546772d25b3647ae29c6528be81b4c49521cb2f2e82a17f2
          • MD5 SHA1 SHA512 SSDEEP

          svchost.exe

          • Path C:\Windows\System\svchost.exe
          • Size 274KB
          • SHA256 fb0bb3cc139bfa693effe397a8d06dc38a62dfbc707e9fea0e62bac6e76d570b
          • MD5 SHA1 SHA512 SSDEEP

          memory/1204-9-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

          memory/1204-56-0x0000000005F30000-0x0000000005F80000-memory.dmp

          memory/1204-11-0x0000000004FB0000-0x0000000005554000-memory.dmp

          memory/1204-10-0x0000000000090000-0x00000000000DA000-memory.dmp

          memory/1204-12-0x0000000004AE0000-0x0000000004B7C000-memory.dmp

          memory/1204-55-0x00000000060B0000-0x0000000006272000-memory.dmp

          memory/1204-13-0x0000000073C00000-0x00000000743B0000-memory.dmp

          memory/1204-57-0x0000000073C00000-0x00000000743B0000-memory.dmp

          memory/1688-58-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/1800-59-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/2840-48-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/3000-0-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/3000-53-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/3856-52-0x0000000000400000-0x000000000043E000-memory.dmp

          memory/4628-51-0x0000000000400000-0x000000000043E000-memory.dmp