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Analysis

  • max time kernel
    143s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 17:29

General

  • Target

    2024-02-14_bc8c01288a10ab43710a5c30c976c64f_cryptolocker.exe

  • Size

    63KB

  • MD5

    bc8c01288a10ab43710a5c30c976c64f

  • SHA1

    42c5cb7080e4bcfa8a6b590c0e0166bf2e0e4196

  • SHA256

    c66456ff59c78ae8b6e725c1d2e80534665fb3c054a9e235eae8d01d153644fc

  • SHA512

    ca77ab4048a1d7e825fe70d8fe1056072179f2117fe38b1fbfd3e05ea850d0be2d1a89070291394316bc2f6372969be16176b04eb1afd21ccb284935025e2e7e

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEO10Km9q:6j+1NMOtEvwDpjr8ox8UDEy0Kms

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-02-14_bc8c01288a10ab43710a5c30c976c64f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_bc8c01288a10ab43710a5c30c976c64f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4700
    • 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:3760

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    f498a49bfd5d77820590ded399edae08

    SHA1

    b939fb94d9f1a9ce01124af22f6e7269ac017a32

    SHA256

    4d11d4e2a71c94aa8da1a9fcd9639cb5d45bcfdc19c7c1796d46233dfa611386

    SHA512

    63e1d76ea6da76707a95c7c3797729d34b3d40b916cf861ac0b19c0f7e6dbd6fcc8da31b31d9dd11f2245c8995f1f2adf7831a3298ffd638aa963a9924d05c64

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3760-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3760-24-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3760-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4700-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4700-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4700-2-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4700-3-0x0000000002240000-0x0000000002246000-memory.dmp

    Filesize

    24KB

  • memory/4700-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB