Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 19:31

General

  • Target

    2024-05-31_6540684a3424ce6f807ccc7e57a265bc_cryptolocker.exe

  • Size

    95KB

  • MD5

    6540684a3424ce6f807ccc7e57a265bc

  • SHA1

    a1bab68286adc425c4aa64ef3394e846d9dff816

  • SHA256

    360246b50ab9c231fb18b625b768fce768aa5e8303d773e9c033f17bda2bfedc

  • SHA512

    2ecfb9d523e5a9d3b936f47083e1dc028f21c11cb0a2314c2325be1d370fa112c529edaebb0f9ed17cbbf34c7fc2d29c2b94a03093d89b1a8522c24061c9e16b

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/kn:zCsanOtEvwDpjB8

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\2024-05-31_6540684a3424ce6f807ccc7e57a265bc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_6540684a3424ce6f807ccc7e57a265bc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5056
    • 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:4744

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    95KB

    MD5

    5f94070dca8d41c1fdf3fcedf71b995d

    SHA1

    10403d70a502f160e63d722bf8d2e610783f75fc

    SHA256

    5efdec325e1de220d5ac124deb3bf6af2b393e9eeacaf4e0a210a26df6b4b6fc

    SHA512

    d91eb3d2afb09673b82f62500d993c2ce877fd6ea415e055bfe40f5ae3f53e88cc7acc31c9d1266619edfab9a03afb09a8ce3960268d48aa20f84b943b185caa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4744-19-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4744-25-0x0000000000530000-0x0000000000536000-memory.dmp

    Filesize

    24KB

  • memory/4744-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5056-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5056-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/5056-2-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/5056-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/5056-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB