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Analysis

  • max time kernel
    124s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 13:07

General

  • Target

    VirusShare_546868d4fd50fb7400d68044d3561c9b.exe

  • Size

    657KB

  • MD5

    546868d4fd50fb7400d68044d3561c9b

  • SHA1

    3fa789c0eea4c01334809a1495ef537dd7cc549c

  • SHA256

    ab302c5c241aa7fee3d6fcce7dc5cb71ee1a0588788a2892f251f37b1081233d

  • SHA512

    53cd2ec8a423c59634c7b1d1344a24132f24a176400b3282c9100c288bf1e883b324060a8d4edf79eefc4cd7d5ac58f8167e41720336e34ea482e334c2cc12a6

  • SSDEEP

    12288:KV2wNOgR31G4GQTq4OaQQTYJ8eP4/L5uO7D3f5BTcq4Wa/QTKJ8eP9/75uO7eU2S:KnOgB1G4GQm4OaHYJ8eP4D5uOHBB14W+

Malware Config

Signatures

  • 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 3 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VirusShare_546868d4fd50fb7400d68044d3561c9b.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_546868d4fd50fb7400d68044d3561c9b.exe"
    1⤵
    • 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)\RichMediaViewV1\RichMediaViewV1release6147\ie\RichMediaViewV1release6147.dll" /s
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2168
    • C:\Windows\SysWOW64\gpupdate.exe
      "C:\Windows\System32\gpupdate.exe" /force
      2⤵
        PID:2604

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files (x86)\RichMediaViewV1\RichMediaViewV1release6147\ie\RichMediaViewV1release6147.dll

      Filesize

      85KB

      MD5

      ca770865b7b0d00aa674820e283c29ad

      SHA1

      a3dae6bec6e4bc5aef66b1a7644fddf4ec9ff749

      SHA256

      aedac8a7fb43ac8dcd72a4ea54fa5d4061117ed809be2e7c01577944c4fbf047

      SHA512

      1e744a3ea7d1153ca31d82844efcabbb820b8844407da7e62df212160b7d9f0d78158dbdd6b32cd615ba94dcc5ff0ac354c7b5bba53642be9f3852364abb9f1f

    • \Users\Admin\AppData\Local\Temp\nsd984A.tmp\aminsis.dll

      Filesize

      567KB

      MD5

      450753ad96785a240a39deccab3af0d0

      SHA1

      21c544064d2ffa6444508268ce258a330d459fc5

      SHA256

      1c371dcc6c3428ea98fb0d2dcb612b4ebc731f3ed72e683c8e33058cd2a952d3

      SHA512

      c41b834f4228b7668316095569c836b4e0d55c5fbf310c65b0e0453ef0e74a3ce8f9357cea90b80f6590f85dd7708eeb4eec27518811ea4aab20c0e7f5643dab