Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 18:26

General

  • Target

    2024-06-01_4994043445cf25f76db6b303ed9c793d_cryptolocker.exe

  • Size

    62KB

  • MD5

    4994043445cf25f76db6b303ed9c793d

  • SHA1

    492494ee0b48aaca703bf2c42914492f5592d3aa

  • SHA256

    c236bcf482ce4edaff44e683080d560b02b78dc02a7a6ab4acf7e5b4334d07cf

  • SHA512

    6feb9e5332adf3f1542876ae418dd50fc5d8c211065585d641eda3cc617ca3466ccb50ec2d9d0fad74541a7842f5041e3e3210bf6b5622b735c91c8abac56037

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9P:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWy

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\2024-06-01_4994043445cf25f76db6b303ed9c793d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-01_4994043445cf25f76db6b303ed9c793d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:228
    • 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:1068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    8e5fe5773097644c570988087a16e4f1

    SHA1

    2bff68b6a8aea7f834fa605efc7cba6c240477d7

    SHA256

    9aa70f5ce91b370c9baddf232f5549299ced6f28ed366f58f62c1c418b5d99d6

    SHA512

    891c474cbaac04e3c6993ecf032626002d7869e4c9c5feea80da062ca9e7a224f81f2cd6daecc7e396180c17378d7992ddb6c1aebdb4989b55e39148e8f65fe0

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/228-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/228-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/228-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/228-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/228-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1068-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1068-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1068-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1068-51-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB