Analysis

  • max time kernel
    87s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-04-2024 01:33

General

  • Target

    2024-04-09_445c1163ecd63e41aa158f525e280ec6_cryptolocker.exe

  • Size

    42KB

  • MD5

    445c1163ecd63e41aa158f525e280ec6

  • SHA1

    e3c627ef91dde135bc547cc619aa48a998097364

  • SHA256

    d2b1f6b816b8017245fc413cf15af97bd5f78d986560cafe9fe528aff2bce777

  • SHA512

    d4c1a0b4c8c38cd7d991b3c71356cda9feeca4405e7dd173b269b05fde89a43278a7dd7d0b28ecd23d6d908023f94a4f98086fefa119ff7d9aa000bf9539aaad

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRpV:m5nkFNMOtEvwDpjG8hhXjV

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\2024-04-09_445c1163ecd63e41aa158f525e280ec6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-09_445c1163ecd63e41aa158f525e280ec6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1620
    • 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:4704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    42KB

    MD5

    40e4ef60df834a434c0be759e281cf29

    SHA1

    3a61e348469570853129d93f689ff721eb6ac3c3

    SHA256

    18e5da7045176f9d6784bbfbf47a3590a00d8b7905b7c56c5210d10d10182a1f

    SHA512

    88f2987577f38fb296a57b8e1a53bf11c118e707f054696400e905e36803ced2bef0bc033a2bf2c7481af5adfee306407fbbd2b724a47b9ef8f05fce0e3354a8

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1620-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1620-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/1620-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/1620-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/1620-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4704-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4704-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/4704-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB