Analysis

  • max time kernel
    139s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/05/2024, 02:15

General

  • Target

    download/msvcr71.dll

  • Size

    346KB

  • MD5

    11316988db0e63468529beff50eccdbe

  • SHA1

    e8c2678b077dd21e6818c4cc4cb565002f090fd3

  • SHA256

    86ec6808c1977f31677dd371ddbc2c4ecaa11c236466c556cdeb00e7dd3f2e96

  • SHA512

    c1ee53103afa7652f1b850347341f3850b724b4a574fffbe1b9c5f3bd5661bc0e347f4676c325c88108593e2f88ce5e5f948f628df181a1cc18d471687ad23ff

  • SSDEEP

    6144:WcV9z83OtqxnEYmt3NEnvfF+Tbmbw6An8FMciFMNrb3YgxxpbCAOxO2ElvlE9:Woz83OtIEzW+/m/AyF7bCrO/E9

Score
3/10

Malware Config

Signatures

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\download\msvcr71.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5076
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\download\msvcr71.dll,#1
      2⤵
        PID:5104
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 5104 -s 600
          3⤵
          • Program crash
          PID:3236
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 5104 -ip 5104
      1⤵
        PID:816
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1328 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:4708

        Network

              MITRE ATT&CK Matrix

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