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Analysis

  • max time kernel
    141s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/05/2024, 15:42

General

  • Target

    2024-05-10_d363ea66299eda55255b58dd53ec4597_cryptolocker.exe

  • Size

    96KB

  • MD5

    d363ea66299eda55255b58dd53ec4597

  • SHA1

    3db531619a8302d02a4546e57483a12bc884119a

  • SHA256

    af7473a2ec1743ea07fe61f24b20cb013d202fb126c416d47a698f1e3f4089ac

  • SHA512

    617aaaa997992c7c9e9642a1304bfb76d47c4efbece508e585ff948d3357b1b9fd1139667d8ce401e28afc93366664955727c3f1c45adc6d6a8541d64c8ed7c7

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRXrZSUfFKazNclMjNUvAc+:xj+VGMOtEvwDpjubwQEI8UtzNcO8Ac+

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\2024-05-10_d363ea66299eda55255b58dd53ec4597_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-10_d363ea66299eda55255b58dd53ec4597_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1224
    • 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:1192

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    96KB

    MD5

    1d251ca28f7e3b2b582bb8a65a2f4bb3

    SHA1

    4cc10d3a5bdc4cda44d7a8b7fd11cb5f9b22d718

    SHA256

    2487772a20183d3f46071238eb4ee097d02752086b93bcf8de69409531171dcb

    SHA512

    1886d688ba903b1ea75a6a06218c39af2d3d29bf4fcfd8db9147c703fdef91aff151ffee4a3db5761f98956c7255643a4e74b28d92bc5542b68e9e5639eec5c4

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1192-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/1192-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1192-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1224-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1224-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1224-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/1224-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1224-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB