Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 14:58

General

  • Target

    2024-04-28_f532b07a119c2ff696a6024da20f9f20_cryptolocker.exe

  • Size

    42KB

  • MD5

    f532b07a119c2ff696a6024da20f9f20

  • SHA1

    e58b47709c0bce259b887240047586a982c74f26

  • SHA256

    8ece53bcdad06233a28fff0f6fba1f18b92a3dbe28430837b54ed530b91b6427

  • SHA512

    6c3fff32de64513059a24c4c2f900cf56031ea7d1d87b269961cd60fd6999f361ec5ba1168b442a976ac9bbcf0a8c07d6fd233d723f8136b67c11846ff4750e7

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/li:6j+1NMOtEvwDpjrRM

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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\2024-04-28_f532b07a119c2ff696a6024da20f9f20_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-28_f532b07a119c2ff696a6024da20f9f20_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3932
    • 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:3608
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4036 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4592

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      42KB

      MD5

      2dec2dad0eff9b07d2e1cf0b85693e13

      SHA1

      3d6d56ec6fb8214a4b613fd90de9d1ee65dce03d

      SHA256

      38685ca39f2190db6b7613f3c66c828dc616c4a1c014c2531a2385bbcc18f47b

      SHA512

      c26c1da140de4d69dc1297e375ae0ebfd4a31a18ef80202ddf0aa7f8809072c6e40d8889a90be620386141fd99e2bf13149f825c461201ae2be4dda7ff47a430

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/3608-47-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/3932-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/3932-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3932-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3932-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3932-24-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB