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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
    30/04/2024, 08:27

General

  • Target

    2024-04-30_7a509175e43910386dc723a853f8bb8f_cryptolocker.exe

  • Size

    41KB

  • MD5

    7a509175e43910386dc723a853f8bb8f

  • SHA1

    961e194a0d79dd98c97b2393b992901107c92230

  • SHA256

    e66778691695f3ad8a7f1cb4f56a80102d8356fdb9d978460017ba9aaa31199c

  • SHA512

    8f2d8e89363322f49917b466efc32b8af384c47565bd9555c53761e861eb9012f144fde04589b2ad0203fd6ad96efe2de1ff8e89b57e068e0b1630a90749c48d

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/yYshNhN:i5nkFGMOtEvwDpjR+viHshN7

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-30_7a509175e43910386dc723a853f8bb8f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-30_7a509175e43910386dc723a853f8bb8f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2852
    • 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:4744

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    41KB

    MD5

    c18259453fb43d3ba13b8fe6a25b2790

    SHA1

    308475e509b4355389d48e866ae11225d6a56855

    SHA256

    d615810ba5bfd5df426b7f72a7855cd619f56ecb0d7353d98dc30e1446607831

    SHA512

    ffa0e6b775ad74fb42699398914c4743287ef26fc909b974229ae2a7e5d3715093285f1a9f9a3c0e047503edfc428ff49c6c099cf6c8a96d7741fc05b99d314e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2852-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2852-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2852-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2852-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2852-19-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4744-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4744-27-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4744-21-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4744-50-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB