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Analysis

  • max time kernel
    91s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/04/2024, 01:36

General

  • Target

    2024-04-11_5972ddb0212d68fd349dbed535915f8a_cryptolocker.exe

  • Size

    95KB

  • MD5

    5972ddb0212d68fd349dbed535915f8a

  • SHA1

    88e004682ee1dd2ad1822a1ec422277eb27e37cd

  • SHA256

    291f37c41bfba1c0ceb7d711fae9453ae54385e8d35b354e118d910b45665dc8

  • SHA512

    c9ef71adac3c046dcaef2eb453b5bd107c73ffeb3b799859fe4a1517d4b4277f3a8529bf148abb0aecd1ff439243fb553ab79b4c8ac82beaec84179cba4cdb8f

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/bY:zCsanOtEvwDpjBc

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\2024-04-11_5972ddb0212d68fd349dbed535915f8a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-11_5972ddb0212d68fd349dbed535915f8a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4540
    • 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:3128

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    95KB

    MD5

    4d9abb2e48ed80ddfcc8f92536e647b0

    SHA1

    51713a355f541822436bced09fba261512309a03

    SHA256

    d928c05401f6f52536af06635401053125af6d36b90aac764e7439d05b84af0b

    SHA512

    b2421028eb16dd7d41cd1108e93f7385c73bf169bfaa558b1cec7cbc2da414a6d172b1e58bd6b36f66070b9ad9746329bdfa528d95fd8b215515e2d8be54277d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3128-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3128-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3128-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3128-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4540-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4540-1-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4540-2-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4540-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/4540-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB