Analysis

  • max time kernel
    87s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 11:46

General

  • Target

    2024-02-14_48ee901a53d2ee6ea19e7d00e903c3f3_cryptolocker.exe

  • Size

    45KB

  • MD5

    48ee901a53d2ee6ea19e7d00e903c3f3

  • SHA1

    9662586c86492ee7e37bd91d2b78fc67b4262587

  • SHA256

    866f0f4dbf19fa1cf17ce42bb7867d0d3fb8da5777fd768f6c1433511a3004bc

  • SHA512

    8e3f5e3f5d0c24e9ecb62c0e394042abaad692fa37afc03191bd6623e0c738b13893cfb523a125c4aec5c3c7eac911876f416e8b3d2f3219b7b8284cd3fdcd90

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsp:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1H

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-02-14_48ee901a53d2ee6ea19e7d00e903c3f3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_48ee901a53d2ee6ea19e7d00e903c3f3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:392
    • 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:4836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    45KB

    MD5

    dd9b88a2b26d17cb08b5900a60d57e5b

    SHA1

    5a657ac44f6204620a90444b7c87c7de78dcf3b3

    SHA256

    45f73a759ac12c7f9388e91ec9b59c43fdcbdff88a34df68f156c86dcdc08594

    SHA512

    574a1f55d9f7dd6ed74d8b65d029fd72301177865b127e3230abf0a83cca0d38e1ac7769fc935e33decb27cf6e18b7a4b7e747c2feeab997ea1b2306770218f1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/392-0-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/392-1-0x0000000002280000-0x0000000002286000-memory.dmp

    Filesize

    24KB

  • memory/392-2-0x0000000002280000-0x0000000002286000-memory.dmp

    Filesize

    24KB

  • memory/392-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

    Filesize

    24KB

  • memory/392-17-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/4836-19-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/4836-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4836-21-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB