Analysis

  • max time kernel
    130s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-01-2024 09:56

General

  • Target

    2024-01-23_e9dd4ee54ea4ab333143ffb0a7f5d131_cryptolocker.exe

  • Size

    38KB

  • MD5

    e9dd4ee54ea4ab333143ffb0a7f5d131

  • SHA1

    ba234149f2c412c7760d926b1571284a02db10e0

  • SHA256

    826737508d991da820d8fc076e3960aa219b6ebf071095274bf8e754a4729f29

  • SHA512

    4ef49de7f4b71deab8e1eebc24cc0c8773fcf3cd4ed595829eb4134850f19b3473cdcdce2ddfd9a7fc4c87713fea50f5129cf8f01c97472a8b1ec8ab6df22c18

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRYn:m5nkFNMOtEvwDpjG8hhXyn

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\2024-01-23_e9dd4ee54ea4ab333143ffb0a7f5d131_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_e9dd4ee54ea4ab333143ffb0a7f5d131_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4212
    • 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:5096

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    e2eb19f1cc3367e8f2dd38c785c7c217

    SHA1

    d1248eef6b116388d78fa482ec174ad04c9296b1

    SHA256

    c4ac221f8b3225521a71048c29fcbe5f1cb23b01453fc43a956a28eaea4ec396

    SHA512

    87884007b2253b76ab430f86731ddea581ebba3e6e257b0503156d477612cd8f0e89521f56a42817a4615d08e2f231faaf678bfb6faf3b0872f739b88b5fc9c1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4212-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4212-1-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4212-2-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4212-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/4212-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/5096-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/5096-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/5096-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB