Analysis

  • max time kernel
    156s
  • max time network
    165s
  • 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 20:49

General

  • Target

    VirusShare_35ce2d24d96aa1a1e460e19cb2f9f69c.exe

  • Size

    657KB

  • MD5

    35ce2d24d96aa1a1e460e19cb2f9f69c

  • SHA1

    6eaef78c270a4eb722aedb7dcc8f24d219bedf28

  • SHA256

    ba181e920e9f89d1c9f5718007d6f981ff1572c49b51fb48420a7b8ac848060d

  • SHA512

    70f923b90e734e016e1549524738c314fa01bda527e5ba23b24e2a08432d7e77d05563032b18e63e20d46040e4a85fdc847a7eadd62295da4a4b51c2d981d383

  • SSDEEP

    12288:WqoKCxmG4GQTq4OaQQTYJ8eP4/L5uO7D3f5Bsq48a/QTKJ8eP9/75uO7eU266Bk:WqoAG4GQm4OaHYJ8eP4D5uOHBBB48aeO

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_35ce2d24d96aa1a1e460e19cb2f9f69c.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_35ce2d24d96aa1a1e460e19cb2f9f69c.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:4800
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release93\ie\RichMediaViewV1release93.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:4580
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:4036
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:4416
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:4976

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release93\ie\RichMediaViewV1release93.dll

          Filesize

          85KB

          MD5

          dbf723dbfe76e71fa975e999b3f1bef9

          SHA1

          be09bb595c52a2e1dc43583a72826a99c7e84684

          SHA256

          9b83ab1f0841cfdb84981f0cb279acef984a877b8b1661129aac33abbe824901

          SHA512

          d7b0cfd3cc2bc0d1827f5ec684bbddfde2f13e601cbedc8967b8a59062f1c6b7601bf4c422e7845a1f8f67b2e9cd5da828133c2ed9b7c55c851017a517a22ecf

        • C:\Users\Admin\AppData\Local\Temp\nsu1077.tmp\aminsis.dll

          Filesize

          567KB

          MD5

          450753ad96785a240a39deccab3af0d0

          SHA1

          21c544064d2ffa6444508268ce258a330d459fc5

          SHA256

          1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

          SHA512

          c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab