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, 16:15

General

  • Target

    VirusShare_f4cf00ca6e52d151fa796044e6ec4f38.exe

  • Size

    657KB

  • MD5

    f4cf00ca6e52d151fa796044e6ec4f38

  • SHA1

    4a056e5e9fe1fdbfd6424be32db162a04e5fdb31

  • SHA256

    c0223074078ab6f1dbd4fd845911bb4e0fbdfb3ce7c5f64295e69a9f62a375c3

  • SHA512

    5779442888d135dadc64039fac777f95107c1773cbfa83e74d898884b54cf30e7c23d1bba13d8b8a5b26cdc1834493d68ffd18b9fb846e928d6c8ecb1b04ab64

  • SSDEEP

    12288:YNUUG4GQTq4OaQQTYJ8eP4/L5uO7D3f5B06q4WarQTwJ8ePB/p5uO71U26eBy:YNUUG4GQm4OaHYJ8eP4D5uOHBB0P4Wag

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_f4cf00ca6e52d151fa796044e6ec4f38.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_f4cf00ca6e52d151fa796044e6ec4f38.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:4740
    • C:\Windows\SysWOW64\regsvr32.exe
      regsvr32 "C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release2941\ie\RichMediaViewV1release2941.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2136
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:4396
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
      1⤵
        PID:756
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
        1⤵
          PID:1604

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release2941\ie\RichMediaViewV1release2941.dll

                Filesize

                85KB

                MD5

                02123778d68ae8e7227c13181f5128cb

                SHA1

                29b5364f1d2fc2c15c6dcb1222ccad54202e20c2

                SHA256

                23c7bcb661bdfd76c37203561bcddaaca8246fb24ba8c1f573ef35ef98f2d98d

                SHA512

                20c31d31d8a81468a0c017011286d0e1e2e16af07bf0b5588781bb6abe4ad36644ec48787d3c972b8c028461e3144ef833aad1a4c958e72accb1040b3efe3e19

              • C:\Users\Admin\AppData\Local\Temp\nsn731E.tmp\aminsis.dll

                Filesize

                567KB

                MD5

                450753ad96785a240a39deccab3af0d0

                SHA1

                21c544064d2ffa6444508268ce258a330d459fc5

                SHA256

                1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

                SHA512

                c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab