Analysis

  • max time kernel
    139s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 15:23

General

  • Target

    2024-01-27_135acb4974d64a98f64b9f9b8f88fd26_cryptolocker.exe

  • Size

    45KB

  • MD5

    135acb4974d64a98f64b9f9b8f88fd26

  • SHA1

    e8376be000efed28f29b427bad8ac5c77ba47091

  • SHA256

    56fe408ac62a59cf21e802bf271800bd6613369f406648ce9fd9b56f14676833

  • SHA512

    b0e99558278b8874f2a5f30b2f4646ae3d9b167d54d9c13ae470e936740650e1a1bd646476499fb15d8854a29427a75107aa0b89d515127e946280dca6e1979c

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1wsv: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\2024-01-27_135acb4974d64a98f64b9f9b8f88fd26_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_135acb4974d64a98f64b9f9b8f88fd26_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3780
    • 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:3828

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          45KB

          MD5

          b9e31786e4a4d7308a88c6996dfa03d4

          SHA1

          278502757eb55ce0329d05c364e14ccca528b77a

          SHA256

          8c9ec70c82d148529e28d8200e9ae1de1cca40a4986416ef18f10f60ad65e448

          SHA512

          b46a51dad6e4305c34c29ae519e70c376bf516e5d908e1c4fd53c2e7b7680da5e52b100856314e0d6e5576fc1e693e6ff2d24eaae35f8c219b93ecbaedcd2941

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3780-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/3780-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

          Filesize

          24KB

        • memory/3780-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

          Filesize

          24KB

        • memory/3780-3-0x0000000000600000-0x0000000000606000-memory.dmp

          Filesize

          24KB

        • memory/3780-18-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/3828-17-0x0000000000450000-0x0000000000453000-memory.dmp

          Filesize

          12KB

        • memory/3828-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3828-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB