Analysis

  • max time kernel
    141s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/05/2024, 04:02

General

  • Target

    2024-05-10_97b24299eed23981378254485328addb_cryptolocker.exe

  • Size

    37KB

  • MD5

    97b24299eed23981378254485328addb

  • SHA1

    1e81e8aa66c31459e13097a80695960904ac8479

  • SHA256

    19794df5ff4b0220e05a1a7100fa6df10106d66c7aa9738e87d7e802d44c73cc

  • SHA512

    d398baf1fac20c2e92505f1299902f0ba6afe403412cb33f790fb2c1e28221ddd0d8d08e7450b830b5fe104953508f3c8cc574cc73723ed8d88ea8ee92e9a708

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4jb:fT+hsMQMOtEvwDpjoIHH

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-10_97b24299eed23981378254485328addb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-10_97b24299eed23981378254485328addb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1640
    • 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:2680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    37KB

    MD5

    1995372d3c58f9c51b08dff14904f4c6

    SHA1

    9ebbc689ca39bca0a83fe5088e1df466e3715d61

    SHA256

    6655a405be141d710be12c11aaa14c111fe4a67a455aaf42d4c9db33dd21f32c

    SHA512

    0a613a5de0db8d74fb08490e769873da570d20d84f2f581f36ce638754e47b06c9d24a2f5cd928864fa4b5803f256097f8f9f5739d04695f04eaadf42d65c09e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1640-0-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/1640-1-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/1640-8-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/2680-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/2680-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB