Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 15:44

General

  • Target

    2024-05-01_0e46554662857d414e7ee8729c2c2de5_cryptolocker.exe

  • Size

    65KB

  • MD5

    0e46554662857d414e7ee8729c2c2de5

  • SHA1

    e04467d8fada043aef323814778b10c42a159f5c

  • SHA256

    d8987e0f52c8c958493c36bd7ea74e361d1ed66eaa47675534f738beb3083142

  • SHA512

    e2816c9b251de4de0dfa0ce8633a7771119ab9531668cadbef97f97542865c10f8bf3f3e4c897f8c74f7078de2c59a002a6b3ad9cbb1e77eec75f70f93b3572a

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5k5BU:zj+soPSMOtEvwDpj4kpmeLmQ/U

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\2024-05-01_0e46554662857d414e7ee8729c2c2de5_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_0e46554662857d414e7ee8729c2c2de5_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3844
    • 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:2188

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    66KB

    MD5

    bae1dbb15f08c70691a2f3ab4ebec9e6

    SHA1

    43c1640b58de609380a66a1e0af27851c5be3fcf

    SHA256

    89346463e40ab605faff209516117caf79c596830eb65bc8f37257c546aed265

    SHA512

    b96493580cf8e1b09acc6b567e2c6ff8ba6c469943198c8e99d9e0db67b9b31ab5cf068e3dad1530824dfee6325613fb67c7f537e3129b7b4af97f8a8c1e2b5d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2188-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2188-25-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/2188-19-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/3844-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3844-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/3844-2-0x0000000002040000-0x0000000002046000-memory.dmp

    Filesize

    24KB

  • memory/3844-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/3844-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB