Analysis

  • max time kernel
    153s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/02/2024, 16:20

General

  • Target

    VirusShare_e7de1b49efca6226d4c1a727b8fb5dc0.exe

  • Size

    657KB

  • MD5

    e7de1b49efca6226d4c1a727b8fb5dc0

  • SHA1

    1e22c12c7cf3d2e8d761a92b575ff29ad10cc20c

  • SHA256

    478d406e968f5a1f656cda098cb3b4b00877ffb6bec4a89ebd7f6b03ec517c75

  • SHA512

    826be6c2bbaf47733d091e6fd0451bd7c6d9d3f99f50512da805fa33df53dfdfb7d395cf72956fe81f5b4df599efe6ab9126cf7496970d8d3e69e3c89811d0d4

  • SSDEEP

    12288:5eU4zlI7MG4GQTq4OaQQTYJ8eP4/L5uO7D3f5BGq4IalQTSJ8ePt/t5uO7EU26ql:5/4zlI7MG4GQm4OaHYJ8eP4D5uOHBBrJ

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_e7de1b49efca6226d4c1a727b8fb5dc0.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_e7de1b49efca6226d4c1a727b8fb5dc0.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:3932
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release457\ie\RichMediaViewV1release457.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:1128
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:1916
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
      1⤵
        PID:1996
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
        1⤵
          PID:1480

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release457\ie\RichMediaViewV1release457.dll

                Filesize

                85KB

                MD5

                d11cb24ddd954e37dafec06d3e8dcc29

                SHA1

                1fcf4a681e85214060278e23424e4aa0cbf76133

                SHA256

                62388ed1a1148b38b3199da8c363f15713c167ab7b4602c7720ddd730d893db4

                SHA512

                ef9fd9e511c03dbb78640e43e8c241a273f482f2c9f4facfbb1251877c4675ddb277c2b7d5ea2bc4d157709e8420635dd2e9661cd82101ce39981c629b01ea74

              • C:\Users\Admin\AppData\Local\Temp\nspF82C.tmp\aminsis.dll

                Filesize

                567KB

                MD5

                450753ad96785a240a39deccab3af0d0

                SHA1

                21c544064d2ffa6444508268ce258a330d459fc5

                SHA256

                1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

                SHA512

                c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab