Analysis

  • max time kernel
    151s
  • max time network
    156s
  • 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, 12:06

General

  • Target
    VirusShare_924dd20216cffc2171b6af76305f5723.exe
  • Size 657KB
  • Sample240204-n97aysbaem
  • SHA256 fc4cd431f5e66bee77c0ca87d2825e1386fe58e8fd236dd67b1a43e1ffc3a353
  • 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_924dd20216cffc2171b6af76305f5723.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_924dd20216cffc2171b6af76305f5723.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:1232
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release4622\ie\RichMediaViewV1release4622.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:4328
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2736
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
      1⤵
        PID:2916
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
        1⤵
          PID:3208

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              RichMediaViewV1release4622.dll

              • Path C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release4622\ie\RichMediaViewV1release4622.dll
              • Size 85KB
              • SHA256 350d8298f5ad4277864cf4e78c31432f29d4b2839847df1a3f6f0f940ad653f1
              • MD5 SHA1 SHA512 SSDEEP

              aminsis.dll

              • Path C:\Users\Admin\AppData\Local\Temp\nsu4477.tmp\aminsis.dll
              • Size 567KB
              • SHA256 1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3
              • MD5 SHA1 SHA512 SSDEEP