Analysis

  • max time kernel
    141s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:54

General

  • Target

    2024-05-22_fd671b57d21de1c29afdc2ecbaf47539_cryptolocker.exe

  • Size

    80KB

  • MD5

    fd671b57d21de1c29afdc2ecbaf47539

  • SHA1

    146f092f96193838799e90889766850b79a6723f

  • SHA256

    8ebad57fc16d17ed735b74012aeba6512af20ecae4163862f0b7f8646631766d

  • SHA512

    7d08ea168e87ec0d6d3baa493baff579ea2b59aee804d3789f5979b24f969eb1b143e6adc6fd94e5a707fee244883c19688c687e868f33bb8076d813f6f8b4fd

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qx:zCsanOtEvwDpjV

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 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\2024-05-22_fd671b57d21de1c29afdc2ecbaf47539_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_fd671b57d21de1c29afdc2ecbaf47539_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3420
    • 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:756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    29355651ecd3d16eaf9b467bf9d1fdd5

    SHA1

    3a238b721367bc2ff50e690e9168a32317c4672a

    SHA256

    0fa5831b5b10de26e8c78d754cf061d0ab1d07761b5e53e4e744603a3a172a7f

    SHA512

    1eccfed0d70ffe4c04d0c01ca287c24b1c88b7ed938f6c2b9dd007d1ad7ce66d9536b7e051fde7c79e84585e575c3fa6358bb19ede31054d493f58e7a259b38b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/756-19-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/756-25-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/756-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3420-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3420-1-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/3420-5-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/3420-8-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/3420-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB