Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 16:35

General

  • Target

    2024-04-05_6c65b4eae706e511f857498e17c105e3_cryptolocker.exe

  • Size

    102KB

  • MD5

    6c65b4eae706e511f857498e17c105e3

  • SHA1

    ae32ee291e36f6d0536f429945014da1259a7aed

  • SHA256

    7a3081276a9be10042e941eb2ba85d3a1a2bf3bb416280c6a4add15c96b13ecd

  • SHA512

    591cfafa21391ca1c93808481def4df8cf960b8b8f6f8bde45b2510983ceda047fabd46f951fb21f3b3e6e8d56ca5eea130fbe7e0476510693b5ec8941d440cd

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRiWjzUNu5aT3J:i5nkFGMOtEvwDpjNbwQEIikgNB

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-04-05_6c65b4eae706e511f857498e17c105e3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_6c65b4eae706e511f857498e17c105e3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3372
    • 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:3724

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    102KB

    MD5

    d496bf1a4d3199f253e7b32e5cdf841d

    SHA1

    2b980455a8d7c075622cf46924593426797f906b

    SHA256

    cb8d9ace25fc3435ace4c8581550d7f559dcebda9aac5fa9cec092b2bc6f6f3f

    SHA512

    7921485f769e5ab444dd08a483d18d3e258396b1387cf7eae16d1c740eb6699e9edb9fdf5cd652e3d106196daf6101ada8c4a2e237763e2cd4ae911164e86f45

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3372-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3372-1-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/3372-2-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/3372-3-0x0000000000690000-0x0000000000696000-memory.dmp

    Filesize

    24KB

  • memory/3372-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3724-19-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/3724-21-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3724-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB