Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 20:53

General

  • Target
    VirusShare_bcc3da7f11aea7618bfb46acc0d7db40.exe
  • Size 657KB
  • Sample240204-zpr63saee6
  • SHA256 3f773f7c02cc87805c4c56539f35928b23f16d3665459b7281cbc98353e36ee6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 22 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies registry class 36 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VirusShare_bcc3da7f11aea7618bfb46acc0d7db40.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_bcc3da7f11aea7618bfb46acc0d7db40.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3204
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release655\ie\RichMediaViewV1release655.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:1572
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:512
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:3292
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:964

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              RichMediaViewV1release655.dll

              • Path C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release655\ie\RichMediaViewV1release655.dll
              • Size 85KB
              • SHA256 63fe7af637b4b05fa44669c34e03b5f6dcbd89fe71064c26d21e84b68f4ea197
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsr4BA0.tmp\aminsis.dll
              • Size 567KB
              • SHA256 1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3
              • MD5 SHA1 SHA512 SSDEEP