Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 01:24

General

  • Target

    2024-05-23_36ffa1e0937cd72e19d7e578ac8e36cb_cryptolocker.exe

  • Size

    86KB

  • MD5

    36ffa1e0937cd72e19d7e578ac8e36cb

  • SHA1

    8c6e7d7e77da0d0eec2fc4fb4f456db2014e3ca2

  • SHA256

    4908fe13451c912edd684fa53b12df0ceb0e36225c9fc760de80a5557cdb88e9

  • SHA512

    53c27aed63d01985ae0af016efd7f3991e51933c183d8304c2aa7f01bcf407d8d228626f15e1252690b06b5698713447c7573c60e81e2d346f816b937904d032

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHNBlA:vCjsIOtEvwDpj5H9YvQd2O

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-23_36ffa1e0937cd72e19d7e578ac8e36cb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_36ffa1e0937cd72e19d7e578ac8e36cb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4784
    • 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:4884

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    87KB

    MD5

    64b1e3776a4abb81b1db143a3dfdfc4e

    SHA1

    0cb7b962980380bdfdebe512d8474c40d3825f63

    SHA256

    763de81c047f4bc0e1705451d00d72dc9d304e17ea586cb2bd48a6e4c14c0fc1

    SHA512

    2efe83cb1227076401a4422240b8250366902836d8ffc322545f005a874b3918f6f2e077ddf8e0aad11546470d1becb95036ca89ddac04dbe13a5741db6fb829

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4784-0-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4784-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/4784-8-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/4884-17-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/4884-23-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB