Analysis

  • max time kernel
    148s
  • 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
    10/06/2024, 03:04

General

  • Target

    2024-06-10_b51131993a770a88db17c83aff0eda91_cryptolocker.exe

  • Size

    124KB

  • MD5

    b51131993a770a88db17c83aff0eda91

  • SHA1

    954eebdd3b4ba70dfcae3af334ad61a310e547e8

  • SHA256

    903233f38c84553ef093e1e764bffbc95f20d7af911cd44a922358a11fdb1abb

  • SHA512

    66de79dcf6c804800c52dcf6578cbbf4e0049c8bc106bb9c1348e52bc0d96d102052cb4f517c96c380fc518a1ca4a6b9f4f0d1ebaf069783c16e854f61e0cecc

  • SSDEEP

    768:gUQz7yVEhs9+4T/1bytOOtEvwDpjNbZ7uyA36S7MpxRIIXVe3mU9TYwlOBTZ+mAF:gUj+AIMOtEvwDpjNbwQEIPlemUhYpy

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • 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\2024-06-10_b51131993a770a88db17c83aff0eda91_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-10_b51131993a770a88db17c83aff0eda91_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1228
    • 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:624

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          125KB

          MD5

          8e53f0db866f10bc07b59da5005119bd

          SHA1

          38ff01bf30da7bc817ff800d2c1b6e0c90a24b3c

          SHA256

          b6eec42f059d38cd935d9ce033e49ff0a6bfdb0dc87fc1c0e1b85ef3c3baf613

          SHA512

          37eed390ab0526be1472db8b9afba59f1fbe246263ab48afa4c1ae6df66c0239b5b94fd87f4c100bd2ca5821de852041a6e4beb8ae0d3e315a98d2b772f4a837

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/624-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/624-23-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/1228-0-0x00000000007B0000-0x00000000007B6000-memory.dmp

          Filesize

          24KB

        • memory/1228-1-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/1228-8-0x00000000007B0000-0x00000000007B6000-memory.dmp

          Filesize

          24KB