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Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 20:50

General

  • Target

    2024-04-05_c7a0b9d2a4b2a5ab5fcc8b69559184e6_cryptolocker.exe

  • Size

    63KB

  • MD5

    c7a0b9d2a4b2a5ab5fcc8b69559184e6

  • SHA1

    4f078dc3672caa8a42ddd16f3bdc05d02443e429

  • SHA256

    73f24bde53cbd09223213fd2a99672ba68c1bc84741295723a7b9e5f624d05be

  • SHA512

    01216ea4d77348eb86e9d2d8c1d8ccf85d98746ba0250b784da5c87724055d423f5e6684d6adbdc43ff2fdafc8d022b1d0d6bb575f5ce610807c1bd258686814

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVwfXQ:zj+soPSMOtEvwDpj4kpmeLmnwQ

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-05_c7a0b9d2a4b2a5ab5fcc8b69559184e6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_c7a0b9d2a4b2a5ab5fcc8b69559184e6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4076
    • 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:4440
  • 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=3376 --field-trial-handle=2148,i,1752153415760610784,11376271161549019716,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4328

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      64KB

      MD5

      57def9db65d85406c2dab18ec48f9a3b

      SHA1

      da297adcb5632f96ac014b6bd4a8641eea310be0

      SHA256

      6dfd31cb00778fc85d6ae675a5e62496b9b40bb000fcd8aa7cf76b9798e48640

      SHA512

      98231123e5f9501546aa4067dd6f3f7e4d2f9f4147c539d4f722750a0db895baee45f54d4bc4f9ff44aa4bdf70b2dd472191181c0fc0413f49e213d8bf10ec88

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/4076-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4076-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/4076-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/4076-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

      Filesize

      24KB

    • memory/4076-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4440-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4440-20-0x0000000000670000-0x0000000000676000-memory.dmp

      Filesize

      24KB

    • memory/4440-23-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/4440-49-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB