Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-04-2024 02:43

General

  • Target

    2024-04-06_811668c9d3815d43f69f659331c58cf1_cryptolocker.exe

  • Size

    54KB

  • MD5

    811668c9d3815d43f69f659331c58cf1

  • SHA1

    8ca264d9d0ff3dfd61393480c0c85dfc9fe92176

  • SHA256

    00e628c57ce5a9f34e87034e2e7078d8fdd992ccfab4b8b33116c787edea1010

  • SHA512

    932f14eb8f9cd3e57b54bac14dded6b879295fa61e2ad97573ee779669af3e331139759ee249f853042e860c1df5004860461bd39caa3b05589ea29de5a91a41

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv0it0:vj+jsMQMOtEvwDpj5HH1nw73KOFsiy

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\2024-04-06_811668c9d3815d43f69f659331c58cf1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_811668c9d3815d43f69f659331c58cf1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:920
    • 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:2988

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    54KB

    MD5

    6bb283412ec3b8efb579835b8ede9251

    SHA1

    bfe0e1e5447db8f4231ba3f4668024a9e923f60b

    SHA256

    86072b36144aed0766b9b6dc008809ace42601c8539d4cab3ce327ed9b3a7f91

    SHA512

    d8e58b975baf665bfba34b5f3a9d23e452e3fa1153481e13b1962e567a6fb08b18cca80cd2b5ae0d441ce1f22a55622eec6c60654ad828fc7fd4c413f801f3e6

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/920-0-0x00000000004C0000-0x00000000004C6000-memory.dmp

    Filesize

    24KB

  • memory/920-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

    Filesize

    24KB

  • memory/920-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2988-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2988-17-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB