Analysis

  • max time kernel
    85s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-02-2024 03:41

General

  • Target

    2024-02-14_3af91551b31f03dad588530d74aa1c80_cryptolocker.exe

  • Size

    74KB

  • MD5

    3af91551b31f03dad588530d74aa1c80

  • SHA1

    d90741f25744e67653e7654d1d6b0bb402299a6c

  • SHA256

    9a01cb2803ea5af58271873a5f11c1a448cef980a44a311ad5bed6b889f85408

  • SHA512

    3ba6e974f8fbe7028f667f3c3891d73b7afde68eafd8e7b5cf967fafb6576a0a6680ed08755c2290216798c9706f0109f0b5b58a0672ff344d8481ff5456433b

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdOyJ3KuY:ZVxkGOtEvwDpjcas

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-14_3af91551b31f03dad588530d74aa1c80_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_3af91551b31f03dad588530d74aa1c80_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:236
    • 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:2940

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    75KB

    MD5

    876f67c75629228cc61e4f3adef7f277

    SHA1

    84177a66275205cd02d5a2a8fadc783434df6a53

    SHA256

    433dc30c21e63586b3f53d6425511d90d57f70f60ca42cfed238bfbfea3e0683

    SHA512

    c7c5258c57f2230aff5740d7714226956348050b156377f063209e7cc987ccdbf6d12ab814678a2fd15c714e84833fae3a6377b88f9a1f44d40029d3817620a2

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/236-0-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/236-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/236-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/236-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

    Filesize

    24KB

  • memory/236-17-0x00000000004F0000-0x00000000004F3000-memory.dmp

    Filesize

    12KB

  • memory/2940-19-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/2940-21-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB