Analysis

  • max time kernel
    144s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-01-2024 11:22

General

  • Target

    2024-01-25_107458889576b27798377f93e7f05c82_cryptolocker.exe

  • Size

    61KB

  • MD5

    107458889576b27798377f93e7f05c82

  • SHA1

    698315c283288f74779b26b0ac457bdc4b6f516a

  • SHA256

    3cdc5b3e81127e93f5ab6f98f3d350fa600717853155deb4e5ab8ad6df878e20

  • SHA512

    e077b28443f88ef76a44e6c94881a2431364a7327b4d22b2bf3cc772f974069b6517ee5b176843ecfa929da7ad9ea0e88aa0c5cbd5e332383c69583dcb221cc8

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMTIr3:TCjsIOtEvwDpj5HE/OUHnSMN

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-25_107458889576b27798377f93e7f05c82_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_107458889576b27798377f93e7f05c82_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5072
    • 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:4536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    61KB

    MD5

    8c894f036910c6c91ca9f138498000df

    SHA1

    00a70f7f4f8bb99bf16d65a098ecc8660c999290

    SHA256

    e6610a17393303a0bd8ac1218c14d9325d932dde4d2a259a41b802535dc95937

    SHA512

    9f75b23c0ca9c9ac3ac5fcfde5fdfe83bf5610daa004bfe128f07127fd07030e283dc13768cc37c21da6433de7aad2b3ab76f925d25f2fdcc3a30a19f54992da

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4536-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4536-20-0x0000000002110000-0x0000000002116000-memory.dmp

    Filesize

    24KB

  • memory/4536-22-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4536-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/5072-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/5072-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/5072-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/5072-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/5072-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB