Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/05/2024, 07:32

General

  • Target

    2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe

  • Size

    38KB

  • MD5

    f266bd4620bb1e098dbd7eacfbbf0cc5

  • SHA1

    817745bb793bea097387ebaf3f7f6ac77e44b88f

  • SHA256

    993241541a323ddf23a084790792116ae145dffce41394288adab5dc1d5a9087

  • SHA512

    97f50cba5588e7c2e1f374151098a350c47d499740053ab6dcb5c0961a65225e08de88a9b189e7e9ac60e93c3146e6453e6812d9027f3347b2b3f250167b54be

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYB:qDdFJy3QMOtEvwDpjjWMl7Ts

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:712
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4396

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          38KB

          MD5

          f0a9b4c1a1f92dc430be2f463548a67d

          SHA1

          7fd4664cb75b7aac8e4b3e932c08922ea140129c

          SHA256

          4ecb6cc62061ba5157529693db751bb5eb0ec88c139963ecc9f120c9ec920d89

          SHA512

          80185b71b0a12e5c3487fcbbb8260f2ce16e415c8208cb157f8ce07fd966ee66fc69e7673ca51d3cf3fe50c60becd98d1edde73ba95806510fab1c7b138985bc

        • memory/712-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/712-1-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/712-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/712-9-0x0000000000560000-0x0000000000566000-memory.dmp

          Filesize

          24KB

        • memory/712-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/4396-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

          Filesize

          24KB

        • memory/4396-26-0x0000000000570000-0x0000000000576000-memory.dmp

          Filesize

          24KB

        • memory/4396-27-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB