Analysis

  • max time kernel
    89s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-01-2024 08:29

General

  • Target

    2024-01-24_61561b3eae4ffa411f182ce7cd12b9aa_cryptolocker.exe

  • Size

    89KB

  • MD5

    61561b3eae4ffa411f182ce7cd12b9aa

  • SHA1

    165d6e4d32f1a4137a744e7108edf193130dd62d

  • SHA256

    a1d532f73522db4fae6e7846ed27f8ef8b174ab1cfc3254f890f76fdc09f7b9c

  • SHA512

    0527c2b4dbc3c7e75579fe51ae341ed71f3eb843db2ad164db10586531db7be8872ca07b2be022a1a8feb369ef8225c31e1c3c519343420e621087bc3afebbf7

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5H8u8rBN6nqEZNi1OkQY00P:vCjsIOtEvwDpj5H8zPsvM

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\2024-01-24_61561b3eae4ffa411f182ce7cd12b9aa_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_61561b3eae4ffa411f182ce7cd12b9aa_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2632
    • 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:2400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    89KB

    MD5

    0072c9ffad3112e1dc4cd4f7160a0611

    SHA1

    05ccc6179e78561d2516674018b2970abc15c804

    SHA256

    3ed3712e7fd666fdb8a51d5fe96914a926fc3a46ba209866fdd951415661faa3

    SHA512

    4b1ce11b338b8c703a8ada852d964bd5c8b4ba723f285262390f95cf9871b4683ee0feef12b400428ac3d5266bc1662311051d32113f9a240a68b5c095a07654

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2400-17-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/2400-19-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2632-0-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/2632-1-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/2632-2-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB