Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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 15:46

General

  • Target

    2024-05-21_8a567e903f1ee58f3adedad7af91615d_cryptolocker.exe

  • Size

    73KB

  • MD5

    8a567e903f1ee58f3adedad7af91615d

  • SHA1

    d4a5ad75fd61c9249320e5bebe0be2dab161eb9c

  • SHA256

    e23a2cdea897898749b4ab1d0a83d11b801428db5139eaae27c24c7841ffbc33

  • SHA512

    7fe610702d3ad2843557ee59d5cf51c5bbeb1bcf738ed1a89b39c1537ed3ecb2485eb3270c1c1a6aaedf42687ef7723dc9db8c4762026baf17c9547250e188f0

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vf:C4Q2c94OtEvwDpj4H8zM

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-05-21_8a567e903f1ee58f3adedad7af91615d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_8a567e903f1ee58f3adedad7af91615d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1332
    • 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:3252

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    73KB

    MD5

    03fc80cf7f588f2fabed1a8b25cbcac9

    SHA1

    5a4c2c91186f06f70640c0855ea3c644b9c669b5

    SHA256

    57efebdb4a8689151bfbeb123ded0ef04ed76297d4eb2ddccf7fb25146b22a62

    SHA512

    68d43e66784de2a5c024ea63df8662a3371bb836088c5672b863d54465bade51477e25fa0ca12958b6862c708432a8e106956947ed99e7bcc0acfa6e6814f26e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1332-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1332-1-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/1332-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/1332-9-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/1332-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3252-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3252-21-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3252-27-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/3252-52-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB