Analysis

  • max time kernel
    133s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 21:37

General

  • Target

    2024-05-22_4f7ab9c34c6fbf544af6a8224523c8e7_cryptolocker.exe

  • Size

    44KB

  • MD5

    4f7ab9c34c6fbf544af6a8224523c8e7

  • SHA1

    5c71812687c0e8dcce048f42f7fd7213dcd08b6b

  • SHA256

    007c47ead7ffaa7fb85f97b3cf276f831979038f3df8bfd95b2cbd395a78da44

  • SHA512

    c08cc4dd38c1a6366f327c493895ac4bf6cf6c79052a31be8b68e52fae58b1899c2c35594e141b522546e98c3df1f4a12ba2c7e7279d2a59db1065c6684a1b3e

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66Tcup:vj+jsMQMOtEvwDpj5HW5scup

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_4f7ab9c34c6fbf544af6a8224523c8e7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_4f7ab9c34c6fbf544af6a8224523c8e7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4700
    • 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:3892

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    d2c8b40143cf3ed6866a85f3a3194076

    SHA1

    cfb2777ce53eefd4de5ab6ac70e8a5d97a49ed84

    SHA256

    4d9e94a5a10c17cb6849eed1c95a81ab36ce2918a9a839a6b5405cc8366d509f

    SHA512

    98052e518852e56bc6d76126fb44fc9859f13bd010b3b8d9ed17c30ee2f422827fb5136770bb8bba14814407b70bfec951357bf8a97617aa180bc601cbe094b3

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3892-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3892-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4700-0-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4700-1-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4700-8-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB