Analysis

  • max time kernel
    86s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-04-2024 18:25

General

  • Target

    2024-04-08_0b4efc885207c6884d888a076b620c68_cryptolocker.exe

  • Size

    64KB

  • MD5

    0b4efc885207c6884d888a076b620c68

  • SHA1

    1329ff510b97e8aa95afabbf8357adfbb1e33b4b

  • SHA256

    2992da3f6a6003384c42c112823e6ae861746cac6fac6685df8186fbae970946

  • SHA512

    16f2fab1a2756ffd005e6d602161d26fa26b03b637d1530b1172db88e289ea2996f2d080886faf84dc96ffff1af9e798a6f4b8c02d597d107d7da03c43793c94

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5kJ7AKR:zj+soPSMOtEvwDpj4kpmeLmQlAi

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-08_0b4efc885207c6884d888a076b620c68_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_0b4efc885207c6884d888a076b620c68_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2600
    • 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:640

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    64KB

    MD5

    eddb758386faca97cfcf7e9e666a5fb1

    SHA1

    2223d3aac2b7be2963269c14b2fab0cbf41132a2

    SHA256

    b14e0373fdb2550636cedf5e12a295eab9a7a24a86f6424d6ee7b0f71ea99248

    SHA512

    780a0872ab80a36d4b3a2bf8463fe47e6c17729768bf2a5a10bdf18faf3680b39436c049b42cd2e68f96ef6395885f133d4f84971c7ad1e331a5d75251f71c19

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/640-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/640-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/640-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2600-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2600-1-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/2600-2-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/2600-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/2600-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB