Analysis

  • max time kernel
    134s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:53

General

  • Target

    2024-05-22_e8c52606abbc65b1ce26c9b84ac8e97c_cryptolocker.exe

  • Size

    70KB

  • MD5

    e8c52606abbc65b1ce26c9b84ac8e97c

  • SHA1

    8e6cd470cc56f18b39f6dece93f3d7ea7a892a85

  • SHA256

    99ef1b2e3a71100f713398c07b18c871ae5c5705648978808c3adfab53046d16

  • SHA512

    648a5d36e5d8428554353e5e012288ed7040870c9f57e0a7ad3fab5328616233459cb59ca8aef8d094815748e3df3d7f2ca1ec2974cf11decc65eda78078b24b

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/Ro:vj+jsMQMOtEvwDpj5HZYTjipvF24Q

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\2024-05-22_e8c52606abbc65b1ce26c9b84ac8e97c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_e8c52606abbc65b1ce26c9b84ac8e97c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4196
    • 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:3532

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    71KB

    MD5

    9a1d866ff7426f129c7ea228a64ef0b4

    SHA1

    7115c56b15b4e41fc5a22b9a7165928bf821204a

    SHA256

    e121a7ab5bb8a09a10918d205c924923025bf5da2b10d4c34fb75806bb8e35fc

    SHA512

    1ee14a967319a8fec0031e2dd910d0d51bff8c50abb333182183cd0ee90af7420525d253a98dac1952feda144284406f86bff5a32789914e1bdeb06544b937ab

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3532-17-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3532-23-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4196-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/4196-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4196-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB