Analysis

  • max time kernel
    84s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-01-2024 04:51

General

  • Target

    2024-01-24_de20c8f921c414f9581878b0636f0780_cryptolocker.exe

  • Size

    80KB

  • MD5

    de20c8f921c414f9581878b0636f0780

  • SHA1

    555f9c7861438e8c18e9b1b60e74df5d5593206c

  • SHA256

    f743051caabd70ceaed010989415d97805692d56813d75525966a79720d800a6

  • SHA512

    6437960515a4ebfbad7b3ce80027e1eb362ed88e437a003f93a193519a368ced5a389a784b883aa764afb22e024c76a8341ad05dd10f5e63248ccdd629c18ada

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHNBmkq:vCjsIOtEvwDpj5H9YvQd2zq

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_de20c8f921c414f9581878b0636f0780_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_de20c8f921c414f9581878b0636f0780_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3600
    • 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:4572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    80KB

    MD5

    3f0122a97d51b887df5b7a834f013bf7

    SHA1

    94cd59b6315b539771364e590b09ea0730f13a8b

    SHA256

    76ee2bfc3b9aa9dc85acf407f8200d7aee61efc673eb393200d181b1e42f09a1

    SHA512

    3b94ce6c8f8517b48dfa64b2f698ca7bebba202e02d7f480b80f8aef445b23a099a748ce2a44362b4ebe690d6a5825f58f60f0845a8820581876af717269fc5f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3600-0-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/3600-2-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/3600-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4572-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4572-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB