Analysis

  • max time kernel
    136s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 14:23

General

  • Target

    2024-05-21_0be3f43e60001dc5bcc7de42136bf6ac_cryptolocker.exe

  • Size

    51KB

  • MD5

    0be3f43e60001dc5bcc7de42136bf6ac

  • SHA1

    705d2b5c14498ae0d511c1ad46dea6356a2462a9

  • SHA256

    595b61953097562199f82c28c3d04b842c1c8020b9d9be438de9933e61977f18

  • SHA512

    0509c23fa50e7587368af2ef848397d37e17b55a0c750ee59baeaf91d03ee4b9089fd1e942295f680bfbfd1081524ade0a9df1e7622e900508548588f0d65961

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRY+iyy9:6j+1NMOtEvwDpjr8hhXy+iyy9

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-21_0be3f43e60001dc5bcc7de42136bf6ac_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_0be3f43e60001dc5bcc7de42136bf6ac_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3700
    • 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:4480

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    52KB

    MD5

    3ad3a62cabc8b3f8f7ae4b532f05cb06

    SHA1

    0b6792660ea9aad23ec4cfd36f2511aecc229dd7

    SHA256

    35006f910629117b1c42a7c824461275ad01d80fa8c2aa2eba8e36a128d01ece

    SHA512

    25acb0f056fbbd912b5102ecbbf11c442dfffbdb1dc8a39e17628d11c7249731c2f0c1e333671676a6a964789d1d0985f15803c5bc8a4d2f7697cb80edda4484

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3700-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3700-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3700-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3700-9-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3700-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4480-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4480-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4480-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4480-51-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB