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Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 00:51

General

  • Target

    2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe

  • Size

    24KB

  • MD5

    a08dd1097036b66cbcfc7cf01dfa01c1

  • SHA1

    58cbe3064c025c973f9056b68e65853f26989a6a

  • SHA256

    819455bddb490fbacdb831dbf60819fa706bf8b17ebf5a221485523972d78076

  • SHA512

    daafd630a3ce7f66bf7cb813ae5abe0fff65f8474a1326b8e7e35ffcbf822666e2d6e2532453bdbb6382c209f865b7df0ff88fb94bb00e63fa5baaad6433ffd0

  • SSDEEP

    384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2v:bVCPwFRo6CpwXFXSqQXfjAsJU

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5100
    • C:\Users\Admin\AppData\Local\Temp\hasfj.exe
      "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
      2⤵
      • Executes dropped EXE
      PID:1440

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    24KB

    MD5

    799436f6de5b734cd015cc5170bf0d93

    SHA1

    ad5ab7739767e06f95f61354a0560eea58c06338

    SHA256

    55cb4959f6d3294696c40bcd439343adc7c04d065b4cdf1a34c04d9a32c88e0b

    SHA512

    36e88817207d5688e2fe85a9f236cfae6f05ea07603b3ef6658733762beda7dae8c4fec97cbd5da77001eb4271f882aff0dde51191d90bfc8b10b234a207d0fc

  • memory/1440-26-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB

  • memory/5100-0-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB

  • memory/5100-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/5100-2-0x0000000003150000-0x0000000003156000-memory.dmp

    Filesize

    24KB

  • memory/5100-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

    Filesize

    24KB

  • memory/5100-18-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB