Analysis

  • max time kernel
    134s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2024, 06:27

General

  • Target

    2024-05-29_28181d55e25ebc571b21ef1e9f46e83a_cryptolocker.exe

  • Size

    49KB

  • MD5

    28181d55e25ebc571b21ef1e9f46e83a

  • SHA1

    2136acfc456796bce56ee3bb66d17a4a10eb81cd

  • SHA256

    0a383b16afa9646edfc84fbb8e290ec776eace22eaaeb1ceaf20841c783aa276

  • SHA512

    b20dec66a495ba3ec32dfe15cff57638fc0d44538925dc90f8fb9eac1befcf5155d78e7ccad1df33258ed9f4e8be1b2c7cb6068fac7d8ff48eeca509dbcb377a

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9Rva/yYsm06MM:xj+VGMOtEvwDpjy+viHs7pM

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\2024-05-29_28181d55e25ebc571b21ef1e9f46e83a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_28181d55e25ebc571b21ef1e9f46e83a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1740
    • 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:4844
  • 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=3608,i,15140928051103392835,1612840580898364401,262144 --variations-seed-version --mojo-platform-channel-handle=3880 /prefetch:8
    1⤵
      PID:4688

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      49KB

      MD5

      5a7b14f9e99ce829fa3459e9a747659e

      SHA1

      e836e9433e727f5897c15768d1ecadf1c2a0e4be

      SHA256

      f3e339977f86e1c9e4f255ee446d3348c5e76b3ee45ab8a7811e67404a7354ea

      SHA512

      ad7596e3f94b61ea5cb20ed09c3a95b70d54389098f6d222b5760e9ba089389262108b005b96189d5d03040864f7470507bd1f34a207404bf7b30b31a20d09af

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1740-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1740-1-0x0000000000560000-0x0000000000566000-memory.dmp

      Filesize

      24KB

    • memory/1740-2-0x0000000002070000-0x0000000002076000-memory.dmp

      Filesize

      24KB

    • memory/1740-9-0x0000000000560000-0x0000000000566000-memory.dmp

      Filesize

      24KB

    • memory/1740-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4844-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/4844-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4844-50-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB