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Analysis

  • max time kernel
    93s
  • 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
    02/02/2024, 13:35

General

  • Target

    2024-02-02_cb6fe33ec7ac3a6b124110857ba68a7f_cryptolocker.exe

  • Size

    79KB

  • MD5

    cb6fe33ec7ac3a6b124110857ba68a7f

  • SHA1

    2dfbb6fdf355b1d7ee4a8021e8202ea94fd078ac

  • SHA256

    5bea63999b0642660fc98644d9be16b5c6f19d70de9f8bb3955afcf496e6b6a5

  • SHA512

    86d278c48552c61ce24fe8462f75f1d039025a7907d3b7ba687679bbce2b2a777d508927ae22383e32af7d62cfb6e76c12cd5eb11d083ae659c178c2bbfd9031

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHF7:vCjsIOtEvwDpj5H9YvQd2d

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-02_cb6fe33ec7ac3a6b124110857ba68a7f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-02_cb6fe33ec7ac3a6b124110857ba68a7f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4428
    • 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:1600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    79KB

    MD5

    ca16eaa5afb3d240407c87d9234a4075

    SHA1

    6eeec1d3d7d0c480e09656a660e305e110955b28

    SHA256

    debb557d7d365c9d8deb9203c2007176862f4a9c99c93d80c08e4e98da3a29b9

    SHA512

    5e37a01eeab8e93dbb86ff9e2796998674777e7f2b7b5ceaf7b6610a1536c3edd6f5568a03ca47a1fab364188796ada4d9883c29d240526c1699c0546a2a1dfb

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1600-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1600-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4428-0-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4428-2-0x0000000000540000-0x0000000000546000-memory.dmp

    Filesize

    24KB

  • memory/4428-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB