Analysis

  • max time kernel
    88s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-02-2024 15:35

General

  • Target

    2024-02-02_b897f6bc90a94c71ca963f812f1939c5_cryptolocker.exe

  • Size

    45KB

  • MD5

    b897f6bc90a94c71ca963f812f1939c5

  • SHA1

    f6d0900dab306ecd2ac835a30377ed8bf66a1e68

  • SHA256

    20846f42ade7dea39f535a4e23527458445addae60b5c91d458fbcdc787ef96c

  • SHA512

    b79d3c76dad8fa608ba22a0d29e8711bfd9eba38b674cb223ea367937945c8389774a8a7da941cc2121d242e5b1f4b967279326c43c5d6608b1c06ae35702182

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr46xdUUqox:vj+jsMQMOtEvwDpj5Hczer5izox

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\2024-02-02_b897f6bc90a94c71ca963f812f1939c5_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-02_b897f6bc90a94c71ca963f812f1939c5_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3736
    • 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:1752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    24a67da393403683d24f865c9f9c13d0

    SHA1

    63a5c5857f31e0393f97f84bd70bf33c9a9ff3c1

    SHA256

    fab38178f8b5bb459cbf28f263b6f88aa0edc17e07b99d0546f8a9ddef13702e

    SHA512

    785e387da1fade8202eccfe58d730ab0fba574019a67a445d20a847dfa00a206f76eb52050ea97337ab9adfac4792df8dcb98b9353d24ac8638947b5e7d246bb

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1752-17-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/1752-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3736-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3736-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3736-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB