Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/06/2024, 23:26

General

  • Target

    2024-06-04_50b519a1bda6fcc1bf5dd1d046d19fc5_cryptolocker.exe

  • Size

    72KB

  • MD5

    50b519a1bda6fcc1bf5dd1d046d19fc5

  • SHA1

    00744a54f0d0af09688cda21ad3a522ea144c1a6

  • SHA256

    a0a77418f97176187808ecc79a4f87bb1313bd1e04fa1c68aefcb645929e4b1f

  • SHA512

    a9ab6c5d8079221e225376492e5660c47b8e6134856a5f9e84dbfa69d81d78edff2ab0624df4e0f5af4ecd770ce0c03fb7c570e34069203d18cca1003094da05

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs97xF:C4Q2c94OtEvwDpj4H8z6

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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\2024-06-04_50b519a1bda6fcc1bf5dd1d046d19fc5_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_50b519a1bda6fcc1bf5dd1d046d19fc5_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3116
    • 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:1424

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    73KB

    MD5

    c53ae3f8b279b7be660ffd86216217ba

    SHA1

    9ffb0bf049d602b853099b5f19b89f8b816e2132

    SHA256

    0b6c00db16d4fb97b7c41df1aafe36501c98a353565451ed8b7d9cfc69349821

    SHA512

    9db9497280899af5acfd6acfb84fafa431b2f53f4568992e0b3d8721bc091dd1b2999ea9490c80f822e54b3549c1ef6629237437d216258108f4fab16d12ba8e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1424-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1424-22-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/1424-21-0x0000000002140000-0x0000000002146000-memory.dmp

    Filesize

    24KB

  • memory/1424-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3116-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3116-1-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/3116-2-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3116-9-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/3116-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB