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Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/03/2024, 04:36

General

  • Target

    2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe

  • Size

    76KB

  • MD5

    acc3b2cec910db1c16842a8626b3c83a

  • SHA1

    bfe00b16606da29e5f85e0b1bac7fc7da24cb11e

  • SHA256

    ec8d34a9205e227e02325eb8a9695eb2be27ee31c9d83cf92792f5e1e3021cab

  • SHA512

    c9cf42821a0596b51acef2388ad637c374051087805efefbf37c06b93588985879f6b3a584bb577e9df0bd46d9b57c3d7188fac96a0ff0c7e3134a84a90cfdda

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdOyJ3KujdI:ZVxkGOtEvwDpjca+

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-16_acc3b2cec910db1c16842a8626b3c83a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4620
    • 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:4956

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    76KB

    MD5

    0d7153c32c09cabfb4ce179f9b774ff4

    SHA1

    c76be358cee47626d41f487ca2291aaf1c9185fc

    SHA256

    01d64e4d983ad1add10416b000e672d79f57417f488a4b2d7c757cc36981a2ce

    SHA512

    34a6a0de6694159f1ae118858c093481125b76d46faf2c081bb6c971177f2ad691ad856f76db0de7eba7e1f545ee5601c04163f563561340873fe0c5a13abf51

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4620-0-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/4620-1-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4620-2-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4620-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/4620-17-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/4956-18-0x0000000000460000-0x00000000004A0000-memory.dmp

    Filesize

    256KB

  • memory/4956-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4956-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB