Analysis

  • max time kernel
    88s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-02-2024 14:41

General

  • Target

    2024-02-13_1ed4c8b43f6b56c58e2e734d2cc5fe74_cryptolocker.exe

  • Size

    80KB

  • MD5

    1ed4c8b43f6b56c58e2e734d2cc5fe74

  • SHA1

    628e06d958b8a390d5524c183c8ecf96080db77e

  • SHA256

    6715f3a284633223116f15cf084079913bce42b28b122861a4ac115bd49070c5

  • SHA512

    a9bfa75b9fe352e69c47b26f6f98d0e195e9a913a445321c8ae13226ab8ccbac3e7a855ebe9a417af83adc00b4033c385a5e4b8d84d13b025ee92709aea0256b

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHFT:vCjsIOtEvwDpj5H9YvQd2F

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\2024-02-13_1ed4c8b43f6b56c58e2e734d2cc5fe74_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_1ed4c8b43f6b56c58e2e734d2cc5fe74_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3512
    • 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:2568

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    80KB

    MD5

    d69e2e24fc322da6f1579204e211747f

    SHA1

    fbd7bbe46dd9c8e35223baad2d211d2ab45c3b0b

    SHA256

    4ebdfb14d75a3a9672841a2a39dec78a91c6f905221e7dc6899c51bd87628293

    SHA512

    93bf59763b84374ad23f48fb4e776ae35222eb0f028b9970c7a784c89b51bc6042119de37059193dcf56e834f02bccd54e9fc96b832929c6999bcedf5a817d99

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2568-19-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3512-0-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3512-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3512-2-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB