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Analysis

  • max time kernel
    135s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/05/2024, 09:40

General

  • Target

    2024-05-12_fdaf494e25f969205cce2a02d0ff1dcc_cryptolocker.exe

  • Size

    97KB

  • MD5

    fdaf494e25f969205cce2a02d0ff1dcc

  • SHA1

    2c72e41329b4514002f7a0a8afcaeece132a179c

  • SHA256

    03eedd8434073806ef21959dfde8b1760ec3dfc31dec8d54df65d9037d8e988c

  • SHA512

    30ef3a9962481932cf0e9de9a74b0f49805184e324da3a665f619c36f015fab9b09eee25537333d9bbc8aa49834aa1a4f7be25c5115e46f40441f1bfae2b9dbf

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/bqr:zCsanOtEvwDpjBK

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\2024-05-12_fdaf494e25f969205cce2a02d0ff1dcc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-12_fdaf494e25f969205cce2a02d0ff1dcc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2252
    • 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:2364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    97KB

    MD5

    95da9f458fdf157848156ead25714275

    SHA1

    d72c22291da8c2bb87bfecb2b0a03b0002ae0cb1

    SHA256

    a76edfd14156ee62702faf48119bac4207524a0f008568ce1dbb9effcd33bebd

    SHA512

    13b4ac9df439146ab60b4020e021fd8b9115c128b610488ac898c7b47d2d0941f86324260dd0b28b07581f0dee8322bb2b7998e1b36f12f93e6fe5f39b0df46b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2252-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2252-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2252-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2364-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2364-20-0x00000000004B0000-0x00000000004B6000-memory.dmp

    Filesize

    24KB

  • memory/2364-26-0x0000000000490000-0x0000000000496000-memory.dmp

    Filesize

    24KB

  • memory/2364-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB