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Analysis

  • max time kernel
    142s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/05/2024, 08:29

General

  • Target

    2024-05-31_93025753cb3f8f540998709ade0b8361_cryptolocker.exe

  • Size

    62KB

  • MD5

    93025753cb3f8f540998709ade0b8361

  • SHA1

    8dad78fcf470d1fd8411dfa6494b8d716b55dddb

  • SHA256

    35989d338a724f36f3fff9f61c2366079b2629e131a12c5fe2d8ebf162150663

  • SHA512

    89dd96544627be5331a67929332a90918a779a902b6ce0179e00804b1fc55bcbc9c239ead3e6871d58bdb2e48ff46eaf37b56b390ac189aa98546c90c7a59724

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG95:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWI

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-31_93025753cb3f8f540998709ade0b8361_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_93025753cb3f8f540998709ade0b8361_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1188
    • 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:3596
  • 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=4312 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4248

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      63KB

      MD5

      944be653853beab8e1d2b5e20aabe174

      SHA1

      d3b3e77ad59f5f3dfc2fb0031ccf15c8c019d86c

      SHA256

      011f6e3dc6669868f071fe2683f915456f7399adf3b71a16c4b25b810b14e792

      SHA512

      7b0ee6ee53d947d41b53b983741a8a85a5d68a9f0eb8d9487d8f7f7bbbd844eaf22609c42552e369a78f2c1256501df6ff88a5690fd340979a397af0eaa9a5c5

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1188-0-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB

    • memory/1188-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

      Filesize

      24KB

    • memory/1188-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

      Filesize

      24KB

    • memory/1188-3-0x0000000002060000-0x0000000002066000-memory.dmp

      Filesize

      24KB

    • memory/1188-25-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB

    • memory/3596-18-0x00000000005C0000-0x00000000005C6000-memory.dmp

      Filesize

      24KB

    • memory/3596-24-0x00000000005A0000-0x00000000005A6000-memory.dmp

      Filesize

      24KB

    • memory/3596-48-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB