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Analysis

  • max time kernel
    137s
  • max time network
    126s
  • 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, 08:46

General

  • Target

    2024-05-21_b5825d068d37773614cb9be2f98c4bc4_cryptolocker.exe

  • Size

    94KB

  • MD5

    b5825d068d37773614cb9be2f98c4bc4

  • SHA1

    c2d138355ad4f0932b46a3169983f75979cce8fc

  • SHA256

    71866b6bcf97562dd6f51605446d130d3ca2b25d3a42dfbbf213bb3566e7aa2d

  • SHA512

    229f0f77557a43a06b1255ece5f2de5179e8ff91fb21245362a7d103ae539ddd263ef6beabf03ff1fd6c074f3071aea440c497032733c2d2f44fbde497207994

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/k0:zCsanOtEvwDpjBv

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\2024-05-21_b5825d068d37773614cb9be2f98c4bc4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_b5825d068d37773614cb9be2f98c4bc4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2244
    • 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:2684

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    95KB

    MD5

    6910ce3a12f3a656951e960716ddca1e

    SHA1

    36bf0285bedf0f66ccd75bb6f8ed07c8402dfd7d

    SHA256

    48b0a354460db6dc058c2f7bca5e03aa6602976b5a263b2fd4324bc6ae9ed178

    SHA512

    8a017fcf26f599985f8bb461e07a4c2bde6758a90ae2e326cd30803b8c95d0ab1669c1827993df0eba4230460f65a6e8894658ba61428f595dcec25d88fb9939

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2244-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2244-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2244-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2684-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2684-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB