Analysis

  • max time kernel
    144s
  • max time network
    150s
  • 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 04:39

General

  • Target

    2024-01-27_d76a101dc31eff89e5b1efdaa6e8c4b8_cryptolocker.exe

  • Size

    79KB

  • MD5

    d76a101dc31eff89e5b1efdaa6e8c4b8

  • SHA1

    c7df96f1bf62014eafdc24ba2f1442853f9ce050

  • SHA256

    e0f18049cbc82ea535916f279d689c12906eec6164e02dd277dd41440aae3b3e

  • SHA512

    262e78c61279f31cee7743e78a5eda1c8e1119cd95cd3e3130e9d4817ab524cf5bbc1aed990f3ceb287b90a51dabcd2fbdadde39cf1dbeebebfea0cd8b347130

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMZ:TCjsIOtEvwDpj5HE/OUHnSMn

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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_d76a101dc31eff89e5b1efdaa6e8c4b8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_d76a101dc31eff89e5b1efdaa6e8c4b8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2920
    • 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:4492

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    79KB

    MD5

    f670f0b7fe574bde06177a4c99c6c538

    SHA1

    0ee11a56ea61e8e01d4b950b3ea5c362e7b46ba9

    SHA256

    6e87af79e769592e4e44ebfcb8b4ef5909094a0d3f41d157cd73c66918c21998

    SHA512

    c04c1d40382169fe695d6fbff25d7b2e601ca6aef72d8b9b179f7b47f6cc54bc9941777bc200be0c68bbc3c3308892a06db0db7c8e00c4b29e79b47a825814b7

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2920-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2920-1-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2920-3-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/2920-2-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2920-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4492-19-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4492-25-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/4492-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB