Analysis

  • max time kernel
    156s
  • max time network
    166s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 04:41

General

  • Target

    2024-01-27_ef604ff321a135b09c2ba21a5b01e69a_cryptolocker.exe

  • Size

    95KB

  • MD5

    ef604ff321a135b09c2ba21a5b01e69a

  • SHA1

    b97db9ab1062cb1ef05e725b231caa7691751542

  • SHA256

    b31bd37acf60361aa73013b03c12f23f1a8481f07e3e93bc558f0bdd88bb2c52

  • SHA512

    fcc52f51358f7084732c6c6fec87fb66a0173a6d43a2c1b080bc2b7e270c329bc0e2d3fa5cfe3958330881bf184c58970150d3788724cb278f72a3dc7f25448f

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJvfT3J:xj+VGMOtEvwDpjubwQEIiVmkfJ

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-27_ef604ff321a135b09c2ba21a5b01e69a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_ef604ff321a135b09c2ba21a5b01e69a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:948
    • 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:1260

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    95KB

    MD5

    5afd6f763f5a843393e8ae74e88d42ca

    SHA1

    ec28e616992893a5d423acfbd53a52936afd6805

    SHA256

    22a1d0aceec703652c4112572671f559d21938d25271aaa3c92360f3c70eea9e

    SHA512

    f16346e30da51b923737f5203dc7afafa6afa50984e7acec4ed7e9d0cee1c89720af83885e492cc986babcc4814e8d8455b97b152bc08f19f66a2893d5de2aca

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/948-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/948-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/948-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/948-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/948-25-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1260-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1260-24-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1260-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB