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Analysis

  • max time kernel
    145s
  • max time network
    150s
  • 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, 12:10

General

  • Target

    VirusShare_4bf3845d2fea32a04d27624653f6b4a2.exe

  • Size

    634KB

  • MD5

    4bf3845d2fea32a04d27624653f6b4a2

  • SHA1

    639c4ae9839a87fb693613fa7488083a30b8ee8e

  • SHA256

    9099720e02c8a901fd943081dd1475ab675538232a6d2c03a2503c588c0406ee

  • SHA512

    32090553b56fa0dc2d743906eb64b9676b6a70d741566d83ec750e1d0d3a2b1a9b9121590d3050460b1ebcc3bc7da6f48acd321feae1a2c82fb68e33a5429db6

  • SSDEEP

    12288:SqCYwBcVxG4GjeZHkwuPikQ7lKH5p5H9x1kqeZHkwuDivQhlKL5p/xlolfq:SqjwuxG4GjeZEXi37l6Br1kqeZE7iohU

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_4bf3845d2fea32a04d27624653f6b4a2.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_4bf3845d2fea32a04d27624653f6b4a2.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:2180
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home969\ie\MediaWatchV1home969.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:4684
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:3204
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:4824
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:3940

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\MediaWatchV1\MediaWatchV1home969\ie\MediaWatchV1home969.dll

          Filesize

          85KB

          MD5

          7a653929c5c9e94267f4076c3072e99d

          SHA1

          d3062eec7ab6eb7f7dee6abc1d1e9aeb5c67101d

          SHA256

          97758420a28db079627538eabfe3bb1827e5a24da6c67bf9046b3551b3140948

          SHA512

          946abbf7a33125ff30ab44a93812e27e8fe94a51878f830c35f4361f32eed08a6df9a172b2a274b837fc6e1350d7aa5f03b01903202d93000a04a424450bb685

        • C:\Users\Admin\AppData\Local\Temp\nsu8483.tmp\aminsis.dll

          Filesize

          559KB

          MD5

          51ba1095f0ae45a2d444bea506cb9ad4

          SHA1

          038a5d53d055a6d440bd2c8864c2f51db206c5e5

          SHA256

          b620091bf9973e807e12155d2247a6d233b5d13ec38c426675470ab4b26f0539

          SHA512

          f5fe2dd0f19bcaab47540ceedbec71f7f7c5b833c8772c097594c458e5f1101fe9feb849812b65c175055f71dfb13f11c4ad94fef42cd66f247413e453de3361