Analysis

  • max time kernel
    135s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 11:32

General

  • Target
    2024-06-03_464485d233407b54c5590b675aa7ebba_cryptolocker.exe
  • Size 49KB
  • Sample240603-nngheaec36
  • SHA256 dd662f849be702628cbd8c65639e56bf3258dd862f733f6daba1c62c1ba748ab
  • MD5 SHA1 SHA512 SSDEEP
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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_464485d233407b54c5590b675aa7ebba_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_464485d233407b54c5590b675aa7ebba_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:792
    • 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:2412
  • 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 --field-trial-handle=4236,i,1067197275908310731,12785105794523264014,262144 --variations-seed-version --mojo-platform-channel-handle=3852 /prefetch:8
    1⤵
      PID:1984

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          misid.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
          • Size 49KB
          • SHA256 3597a6893e6fed68c103e3de32718001a075a46f8174ef151e7e3161c063dea2
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misids.exe
          • Size 315B
          • SHA256 d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3
          • MD5 SHA1 SHA512

          memory/792-0-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/792-1-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

          memory/792-2-0x0000000002000000-0x0000000002006000-memory.dmp

          memory/792-9-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

          memory/792-17-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/2412-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

          memory/2412-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

          memory/2412-48-0x0000000000500000-0x0000000000510000-memory.dmp