Analysis

  • max time kernel
    150s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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
  • Loads dropped DLL 16 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 40 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⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2092
    • \??\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
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:2544
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2544 -s 1684
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2456
    • C:\Users\Admin\AppData\Local\icsys.icn.exe
      C:\Users\Admin\AppData\Local\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2200
      • \??\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
        • Loads dropped DLL
        • 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:2812
        • \??\c:\windows\system\spoolsv.exe
          c:\windows\system\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2880
          • \??\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
            • Loads dropped DLL
            • 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:2664
            • \??\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:1760
            • 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:2944
            • 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:716
            • 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:1388

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        mrsys.exe

        • Path C:\Users\Admin\AppData\Roaming\mrsys.exe
        • Size 274KB
        • SHA256 62f7af2f218e17ab5de10399ca3826a63db5cc9712310b2a50771700e91b4da9
        • MD5 SHA1 SHA512 SSDEEP

        1727684587d91a3fc4a77823bfb5c4c41b9d6c0bff84ae126bd19290c7e03bed994fdb4477364.dat-decoded.exe 

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

        icsys.icn.exe

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

        explorer.exe

        • Path \Windows\system\explorer.exe
        • Size 274KB
        • SHA256 fe690ca1d14504df96ac7e81f98e7792a7d7ac621df79ef2eea54ee4a3332101
        • MD5 SHA1 SHA512 SSDEEP

        spoolsv.exe

        • Path \Windows\system\spoolsv.exe
        • Size 274KB
        • SHA256 03fed611627e8b22b169cbf004d50d544d28abe9917abd85fc2b2d8749a0faf8
        • MD5 SHA1 SHA512 SSDEEP

        svchost.exe

        • Path \Windows\system\svchost.exe
        • Size 274KB
        • SHA256 047f25672c176155b1e76561ae0046b0a43795088ea6c5002ace84e03f2a1ce6
        • MD5 SHA1 SHA512 SSDEEP

        memory/1760-79-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2092-83-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2092-0-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2092-21-0x0000000002C90000-0x0000000002CCE000-memory.dmp

        memory/2200-34-0x0000000001E00000-0x0000000001E3E000-memory.dmp

        memory/2200-84-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2544-60-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

        memory/2544-11-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

        memory/2544-67-0x0000000073B90000-0x000000007427E000-memory.dmp

        memory/2544-13-0x0000000073B90000-0x000000007427E000-memory.dmp

        memory/2544-12-0x0000000000210000-0x000000000025A000-memory.dmp

        memory/2664-72-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2664-94-0x0000000000590000-0x00000000005CE000-memory.dmp

        memory/2664-93-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2812-91-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2812-49-0x0000000000560000-0x000000000059E000-memory.dmp

        memory/2812-92-0x0000000000560000-0x000000000059E000-memory.dmp

        memory/2812-36-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2880-82-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2880-69-0x0000000002A70000-0x0000000002AAE000-memory.dmp

        memory/2880-70-0x0000000002A70000-0x0000000002AAE000-memory.dmp