Analysis

  • max time kernel
    130s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-05-2024 20:25

General

  • Target

    2024-05-12_496a8a0e0fefa3a96202c516230ff663_cryptolocker.exe

  • Size

    48KB

  • MD5

    496a8a0e0fefa3a96202c516230ff663

  • SHA1

    c461675cdd686fd3f22a560a4ce781f82ad9fbd4

  • SHA256

    85552232b35fd13fdaaf1a06219f26fad03c6763a8b93cc3636204ee7dd1c65c

  • SHA512

    c83c870d002e5a0e2580a346b89fa34d96a3ff311ff6fc8755ae500fd44080307b5496b9caa6cc5c303b7488f1adad68058af2d8404d0f0a67adf9c909fec755

  • SSDEEP

    384:icX+ni9VCr5nQI021q4VQBqURYp055TOtOOtEvwDpjqIGR/hHi7/OlI0G/BdmRSt:XS5nQJ24LR1bytOOtEvwDpjNbP/bmu

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-05-12_496a8a0e0fefa3a96202c516230ff663_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-12_496a8a0e0fefa3a96202c516230ff663_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4200
    • 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:1144

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    48KB

    MD5

    6fa599a5e630c287ab3f1e3587a251a2

    SHA1

    0f0477ddfd0bb3605e06e181d7a099598a54a85c

    SHA256

    d797f77ea7e3bda0238f12dfe5c3b73ccd1af22b9d2c9f3d79f829be86a06199

    SHA512

    adad61b2cd47e03c9745ff127ed10e03304589cb7f33c0c48865bcfd6452585320f6272f641729faf91c85c7440ff56832d433e794d77d33a6db3cffed50c446

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1144-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1144-21-0x00000000007E0000-0x00000000007E6000-memory.dmp

    Filesize

    24KB

  • memory/1144-27-0x00000000007C0000-0x00000000007C6000-memory.dmp

    Filesize

    24KB

  • memory/1144-51-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4200-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4200-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4200-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4200-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4200-20-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB