Analysis

  • max time kernel
    104s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-02-2024 11:50

General

  • Target

    2024-02-11_f9e31738289363b5571918e60dbf3c0d_cryptolocker.exe

  • Size

    48KB

  • MD5

    f9e31738289363b5571918e60dbf3c0d

  • SHA1

    1270a27dc4880874ae9b10922f344e80f8ccedd0

  • SHA256

    65580d8206e38ecf6288067d5d00e743a5cf6acd64e0a841cec84430e4c3711c

  • SHA512

    32a5b5eeb96d29527a7849bbdc7a1eea32eec5dcfdbb381b0083e160c3e67d6894434e7de725eeeaf99cc61792c246bc4dfca5938e89144fb33fd89444700991

  • SSDEEP

    384:icX+ni9VCr5nQI021q4VQBqURYp055TOtOOtEvwDpjqIGR/hHi7/OlI0G/74zpzv:XS5nQJ24LR1bytOOtEvwDpjNbP/0Geht

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\2024-02-11_f9e31738289363b5571918e60dbf3c0d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-11_f9e31738289363b5571918e60dbf3c0d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5900
    • 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:1928

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    48KB

    MD5

    cd1fb6ec8c11f9208201ea412e709224

    SHA1

    edd806ee49972eeea1e34f3b9d461ba767cc813a

    SHA256

    82492dc7fa0c3fe0fd4804ebd9d228d8afcd98eaa461f0cbd770566e815867fe

    SHA512

    3229591a53ec4918ca827a4ef7e66820ace4869cf6cb206743ec349c6a4ef537b68e884b581c192e4ae6a97544cba1c73d46b1ff13c909977a1813b59d26853d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1928-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/1928-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/1928-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/1928-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5900-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/5900-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/5900-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/5900-3-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/5900-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB