Analysis

  • max time kernel
    143s
  • 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
    13-02-2024 22:43

General

  • Target

    2024-02-13_da775ff177cec7f0cbdc08dd37046128_cryptolocker.exe

  • Size

    36KB

  • MD5

    da775ff177cec7f0cbdc08dd37046128

  • SHA1

    d4e2c49480de70d6ced9fd4e3d869651d003b858

  • SHA256

    93edf22c9001d7a85e4028e667f5787023fd893f0063cee519b7b506042818b9

  • SHA512

    0221b240eab98cbd4c4d50e9ce1fbac30e8055d23627b09aa3e406b886dc933a71ebc78c329d865d0ef9466cf132f70f2401ff169a36edb464d189f7f9475372

  • SSDEEP

    768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnv00Gf:m5nkFNMOtEvwDpjG8h00Gf

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\2024-02-13_da775ff177cec7f0cbdc08dd37046128_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_da775ff177cec7f0cbdc08dd37046128_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3908
    • 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:3944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    36KB

    MD5

    60ad1eccfa4ac24e2901c51e554ef5b9

    SHA1

    ac97365d7a07e407355e7d802d8294a6823ac81e

    SHA256

    84a113457cdb0bb1c80b3752c9969c9545f42e10ec0418e1199e6b3778f9e10b

    SHA512

    bad3693e0b8f668d24dd617f917c60fb0241af9b932ac1ef2359c11350d9cfd8b666a0e3e874bb1f105b56c47d0edf603153043fe0769c5f9fa5614adc7dfda5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3908-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3908-1-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3908-2-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/3908-3-0x00000000021D0000-0x00000000021D6000-memory.dmp

    Filesize

    24KB

  • memory/3908-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3944-20-0x0000000002140000-0x0000000002146000-memory.dmp

    Filesize

    24KB

  • memory/3944-19-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/3944-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB