Analysis

  • max time kernel
    145s
  • 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
    30/05/2024, 21:39

General

  • Target

    2024-05-30_c3b26e9670c2149a7ffeea3334e2474e_cryptolocker.exe

  • Size

    42KB

  • MD5

    c3b26e9670c2149a7ffeea3334e2474e

  • SHA1

    59eeddd373b779e373b78582d6fa2a151312bf4e

  • SHA256

    31ca80f8aef973a76b759dc408080a9bdf96e47892a108c1b8ea587483684e33

  • SHA512

    48528b119076f45fe7816d3e4294171841d1b4de0176ba6704c4d31152a8f1ab64d956d7a33692db8898e08285591275d6547ee2bbcc6b8cbca2314399ab8663

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnY1n9m:m5nkFNMOtEvwDpjG8hgpY19m

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-30_c3b26e9670c2149a7ffeea3334e2474e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-30_c3b26e9670c2149a7ffeea3334e2474e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4032
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:3104
  • 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=5128 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3016

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\misid.exe

            Filesize

            42KB

            MD5

            18e25928c58546e817d6f3333ed18fd4

            SHA1

            8eab5031d1911c1bfbc34d642484bf0743e6343a

            SHA256

            820df02ba14e7e4bae33d35c4597179c5faf23953d62fbe6c57c2af47776a488

            SHA512

            876c0bad8111d7a23abb67af117efd81ec5c78f85e5b58521e4b2b025074f9677bb33cfbd3153143369deca7aa04ff344a2ee539d57341fc66d8f03d180224fd

          • C:\Users\Admin\AppData\Local\Temp\misids.exe

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/3104-18-0x00000000006D0000-0x00000000006D6000-memory.dmp

            Filesize

            24KB

          • memory/3104-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

            Filesize

            24KB

          • memory/3104-48-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB

          • memory/4032-0-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB

          • memory/4032-1-0x0000000000670000-0x0000000000676000-memory.dmp

            Filesize

            24KB

          • memory/4032-2-0x0000000000670000-0x0000000000676000-memory.dmp

            Filesize

            24KB

          • memory/4032-3-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/4032-25-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB