Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 06:33

General

  • Target

    2024-01-24_b943dc4b60338ff852922bc17b110666_cryptolocker.exe

  • Size

    81KB

  • MD5

    b943dc4b60338ff852922bc17b110666

  • SHA1

    f2d93878c0e8135713bcf7c4fb80a0f5723a9a2b

  • SHA256

    db9a90f25c0547a3e0f794bbb630170970cd2a3520020b5d665d97d07741319c

  • SHA512

    3941a8c053bca4941f815ed1c408f53d79dc8d16230aef8ce6aafa2d43119fafb3f2049778bfd903a7865b7a610c495f0731961a0705cefb379802ac4198b484

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMAef:TCjsIOtEvwDpj5HE/OUHnSMZ

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-24_b943dc4b60338ff852922bc17b110666_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_b943dc4b60338ff852922bc17b110666_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3692
    • 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:4928

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          81KB

          MD5

          29729d980ec8a5808ce5177b9cb95d68

          SHA1

          c1bc9dbbf58ac839b258a2ef9b9e8854063b5a10

          SHA256

          34e6f6e2e6c2948d0f45b93c6ec8847cec6ffeda7c4def8bfc9a14e1ded3bf2a

          SHA512

          8c6b386abb20a6ce64016548fbe32c64c90dfad29ad8be4d3be9827509cf3645b35b12fc5509780fcb87ae567691a67e2e1c38fc547d463642a773b38bb1b8bb

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3692-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/3692-1-0x0000000002320000-0x0000000002326000-memory.dmp

          Filesize

          24KB

        • memory/3692-2-0x0000000002320000-0x0000000002326000-memory.dmp

          Filesize

          24KB

        • memory/3692-3-0x0000000002230000-0x0000000002236000-memory.dmp

          Filesize

          24KB

        • memory/3692-19-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4928-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4928-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/4928-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/4928-49-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB