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Analysis

  • max time kernel
    140s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/04/2024, 21:24

General

  • Target

    2024-04-28_8306a7f1573cfc76c4c259e9e9b8a3fd_cryptolocker.exe

  • Size

    47KB

  • MD5

    8306a7f1573cfc76c4c259e9e9b8a3fd

  • SHA1

    0f9175485f0a92f4bee99ee0e3b2bf300be4799e

  • SHA256

    0e6d0c8c07e53aa456b044fe6392d9363511a3229a59eaa7c936b77b238a7d4b

  • SHA512

    70d8ae4ee16161ac444bbb9a5425068d24c4d0de10ed1712a5893c39df1a0aa9f31f29e6dc15262eb652814bf85ace035d1f9177cc1cd676f557b7599c1b2f44

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9Rva/yYsmm:xj+VGMOtEvwDpjy+viHsn

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-04-28_8306a7f1573cfc76c4c259e9e9b8a3fd_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-28_8306a7f1573cfc76c4c259e9e9b8a3fd_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3296
    • 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:2900
  • 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=3716 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:5292

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      47KB

      MD5

      e47a435f259cb91900a5e540f8a809ab

      SHA1

      6000b15fab5cbf0d05905d6db9f61651338b53bc

      SHA256

      daf17e2f578bd1923734ca632efaabf817ce5251dfda3c0afbba7480f22a961e

      SHA512

      ea12eedce6a91040078bd4862c7dd9240e1ac551757211dfb7336d96ccfaf0a1926cf35e4ccd815b0737afd766178c68b472de180af2abf8ec45484a68043a55

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2900-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/2900-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/2900-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3296-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3296-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

      Filesize

      24KB

    • memory/3296-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

      Filesize

      24KB

    • memory/3296-3-0x0000000002110000-0x0000000002116000-memory.dmp

      Filesize

      24KB

    • memory/3296-24-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB