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Analysis

  • max time kernel
    139s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 15:23

General

  • Target

    2024-05-26_03d12636f5052f8efd36b07d324cffc7_cryptolocker.exe

  • Size

    44KB

  • MD5

    03d12636f5052f8efd36b07d324cffc7

  • SHA1

    60e4dbe608bf8c65a6e55db513446ff609d96bd8

  • SHA256

    eba7909c2548d4176a1571f2f81c1d4e15092cb8954d5e00b1d5f95556d41bc5

  • SHA512

    897e617685987edf964ab1fb4f4ffbadbfc43272e6ebdccbfb2a13bc881d66b4852a5ef0419ef6b99209203e63c55bcd2e2d45cdac538b79fabf2cae571e0fab

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/aMD9:6j+1NMOtEvwDpjrRrx

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_03d12636f5052f8efd36b07d324cffc7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_03d12636f5052f8efd36b07d324cffc7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2428
    • 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:1376
  • 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=3944 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4776

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      45KB

      MD5

      0956b07e88a0f1281b314b880733df6f

      SHA1

      b17ed32c36b9ec3ec0bf78347f1b00ce8008c33f

      SHA256

      fc1b978760bd5e61eb8d8e791e2fcd7184a942416b0c6cabf46d49ee3409fd57

      SHA512

      47967e5031bca23fa2752adec970391bcc42a96b5d7fd50a0846b4dc9f9b6545f95e4410937330bf3cd3e1214e603169068222a90a7b6c62d9b209732535d1e6

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1376-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/1376-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1376-48-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2428-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2428-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

      Filesize

      24KB

    • memory/2428-2-0x00000000021E0000-0x00000000021E6000-memory.dmp

      Filesize

      24KB

    • memory/2428-3-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2428-4-0x0000000002050000-0x0000000002056000-memory.dmp

      Filesize

      24KB