Analysis

  • max time kernel
    90s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 13:49

General

  • Target

    83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d.exe

  • Size

    966KB

  • MD5

    f894cd4217838c01eb188e0e6c02a162

  • SHA1

    05ff59b6ff17fdd1d8ce9c1e14346dc93a382ee1

  • SHA256

    83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d

  • SHA512

    da93bed4ab8cc145e4c60c69b2fc148b2dde9a221791874ff0afbcd7518cbabca90f6f0fc0df134e52f395ca3f9d12e5348f51c6f259db6ce6a1150eed48bba9

  • SSDEEP

    24576:j7CIrr0eIp7RYDT18UJaerBvhcPILrrq2tkyzMhGGk:3CWIp7RYCxe1vKPg5kycv

Malware Config

Signatures

  • NirSoft MailPassView 5 IoCs

    Password recovery tool for various email clients

  • Nirsoft 9 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d.exe
    "C:\Users\Admin\AppData\Local\Temp\83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1408
    • C:\Users\Admin\AppData\Roaming\tmp.exe
      "C:\Users\Admin\AppData\Roaming\tmp.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:592
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c copy /z "C:\Users\Admin\AppData\Roaming\tmp.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tmp.exe"
        3⤵
        • Drops startup file
        PID:1720
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Example" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\Antivirus.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:900
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Example" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\Antivirus.exe
          4⤵
          • Adds Run key to start application
          PID:664
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 1692
        3⤵
        • Loads dropped DLL
        PID:1460
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /stext "C:\Users\Admin\AppData\Local\Temp\logff.txt
        3⤵
          PID:1636
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /stext "C:\Users\Admin\AppData\Local\Temp\logmail.txt
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1516
      • C:\Users\Admin\AppData\Local\Temp\83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d.exe
        C:\Users\Admin\AppData\Local\Temp\83b2ee96940a6d6fc8f1ee0064cafd17abb9db05e89e1cdb4e207ca2987c2f1d.exe
        2⤵
          PID:1648

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\logff.txt

        Filesize

        2B

        MD5

        f3b25701fe362ec84616a93a45ce9998

        SHA1

        d62636d8caec13f04e28442a0a6fa1afeb024bbb

        SHA256

        b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

        SHA512

        98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

      • C:\Users\Admin\AppData\Roaming\tmp.exe

        Filesize

        444KB

        MD5

        c12a419d275e047fbf4e022099d19c70

        SHA1

        76d1105ddc3898c11f662f3ec32108532a4d3741

        SHA256

        6aa841156ff4c12da3ace285ac4ceb388cebe54a9332803e521519e448c18180

        SHA512

        10fffafcd1a004a8650c0362469a52a24191372aafa64e696f44923c7d9f156197970917926b343d90fedb15b56838d840482d7ae5d9942768efcd0315568b9d

      • C:\Users\Admin\AppData\Roaming\tmp.exe

        Filesize

        444KB

        MD5

        c12a419d275e047fbf4e022099d19c70

        SHA1

        76d1105ddc3898c11f662f3ec32108532a4d3741

        SHA256

        6aa841156ff4c12da3ace285ac4ceb388cebe54a9332803e521519e448c18180

        SHA512

        10fffafcd1a004a8650c0362469a52a24191372aafa64e696f44923c7d9f156197970917926b343d90fedb15b56838d840482d7ae5d9942768efcd0315568b9d

      • \Users\Admin\AppData\Roaming\tmp.exe

        Filesize

        444KB

        MD5

        c12a419d275e047fbf4e022099d19c70

        SHA1

        76d1105ddc3898c11f662f3ec32108532a4d3741

        SHA256

        6aa841156ff4c12da3ace285ac4ceb388cebe54a9332803e521519e448c18180

        SHA512

        10fffafcd1a004a8650c0362469a52a24191372aafa64e696f44923c7d9f156197970917926b343d90fedb15b56838d840482d7ae5d9942768efcd0315568b9d

      • \Users\Admin\AppData\Roaming\tmp.exe

        Filesize

        444KB

        MD5

        c12a419d275e047fbf4e022099d19c70

        SHA1

        76d1105ddc3898c11f662f3ec32108532a4d3741

        SHA256

        6aa841156ff4c12da3ace285ac4ceb388cebe54a9332803e521519e448c18180

        SHA512

        10fffafcd1a004a8650c0362469a52a24191372aafa64e696f44923c7d9f156197970917926b343d90fedb15b56838d840482d7ae5d9942768efcd0315568b9d

      • \Users\Admin\AppData\Roaming\tmp.exe

        Filesize

        444KB

        MD5

        c12a419d275e047fbf4e022099d19c70

        SHA1

        76d1105ddc3898c11f662f3ec32108532a4d3741

        SHA256

        6aa841156ff4c12da3ace285ac4ceb388cebe54a9332803e521519e448c18180

        SHA512

        10fffafcd1a004a8650c0362469a52a24191372aafa64e696f44923c7d9f156197970917926b343d90fedb15b56838d840482d7ae5d9942768efcd0315568b9d

      • memory/592-64-0x0000000074190000-0x000000007473B000-memory.dmp

        Filesize

        5.7MB

      • memory/592-59-0x0000000000000000-mapping.dmp

      • memory/592-68-0x0000000002115000-0x0000000002126000-memory.dmp

        Filesize

        68KB

      • memory/592-72-0x0000000074190000-0x000000007473B000-memory.dmp

        Filesize

        5.7MB

      • memory/592-73-0x0000000002115000-0x0000000002126000-memory.dmp

        Filesize

        68KB

      • memory/664-67-0x0000000000000000-mapping.dmp

      • memory/900-66-0x0000000000000000-mapping.dmp

      • memory/1408-55-0x0000000074190000-0x000000007473B000-memory.dmp

        Filesize

        5.7MB

      • memory/1408-63-0x0000000074190000-0x000000007473B000-memory.dmp

        Filesize

        5.7MB

      • memory/1408-54-0x0000000075F21000-0x0000000075F23000-memory.dmp

        Filesize

        8KB

      • memory/1408-56-0x0000000074190000-0x000000007473B000-memory.dmp

        Filesize

        5.7MB

      • memory/1460-69-0x0000000000000000-mapping.dmp

      • memory/1516-89-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-90-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-103-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-102-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-101-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-98-0x0000000000411654-mapping.dmp

      • memory/1516-97-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-95-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-94-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1516-92-0x0000000000400000-0x000000000041B000-memory.dmp

        Filesize

        108KB

      • memory/1636-83-0x000000000040E758-mapping.dmp

      • memory/1636-74-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-87-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-86-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-82-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-75-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-80-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-79-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1636-77-0x0000000000400000-0x0000000000418000-memory.dmp

        Filesize

        96KB

      • memory/1720-65-0x0000000000000000-mapping.dmp