Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/06/2024, 04:28

General

  • Target

    2024-06-04_1f1cd184faaf4cc2f1c845802591afdb_cryptolocker.exe

  • Size

    39KB

  • MD5

    1f1cd184faaf4cc2f1c845802591afdb

  • SHA1

    8ce27370bb33c03bd47e0c023b323afd481f1b0b

  • SHA256

    ecc11abe4a08a4e269017daaa8f9947e200570e25d43b84bdde52a2dde53bf11

  • SHA512

    0694e1a1d6aacc8aa6d361155621aebca8883bcc46c89831686737fdb8e8a57872a64a452e0eaf8983e5e542cd2afa45275ef52e1fc4aea0e730e2702d0bd682

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLenU9h8:ZzFbxmLPWQMOtEvwDpjLeg8

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\2024-06-04_1f1cd184faaf4cc2f1c845802591afdb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-04_1f1cd184faaf4cc2f1c845802591afdb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4620
    • 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:4548

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          40KB

          MD5

          0caac0becaf2191d7a3fd08d76422a1d

          SHA1

          0177a3644173bea419595bef2436a44c52b73147

          SHA256

          00426936724a5f9b908b8a7eb9acc56fbfa2de9c700a9d57d00eee9ff71fbe44

          SHA512

          62cee74c4dbb4157a19156a56c41ce23b891945bc7db69f447b957c405a2d8719725c478f672332c6b409b8bdb02a8bfaa00e4d490340645bd0a7bba4e810bdf

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/4548-18-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/4548-20-0x0000000000850000-0x0000000000856000-memory.dmp

          Filesize

          24KB

        • memory/4620-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/4620-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/4620-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/4620-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/4620-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB