Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 15:53

General

  • Target

    2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe

  • Size

    40KB

  • MD5

    8a9f60e10293364644e5540dd74eb404

  • SHA1

    f5fc87574e40a95b1f67ca7c2e22a8a295b24d32

  • SHA256

    2610f1bcc56f972a6bd51658ce834900cb35ec468939b4ebc8c89acafb0ee825

  • SHA512

    4c74b4607485695d6e5d3d451cd586be7295e63329eb649f458fbf626134ef78be19f18abeffa3af32914b4f772396214ce5c92c026beebb944db1d384f05547

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8Z1EC:qDdFJy3QMOtEvwDpjjWMl7Tdn8ZOC

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\2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3448
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:940

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          40KB

          MD5

          41bea78bdaad6da26c632d3303d4b97a

          SHA1

          74b15ba3388a60e8c44da12c59e8b45e303cf921

          SHA256

          4124c4a289f21bce7e7d666307aee3846b83dbd3533d35288b1f016010d5f78e

          SHA512

          d90f34412ff55ad13a8ee2ef4eee35af2c84490b37bc8b38e9232bb58505430daf39d642b87d1283704ed80de614c53477c06575306c1a61cc2266163f978dbe

        • memory/940-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/940-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/940-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/940-27-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3448-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/3448-2-0x0000000000510000-0x0000000000516000-memory.dmp

          Filesize

          24KB

        • memory/3448-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB