Analysis

  • max time kernel
    142s
  • 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
    04-04-2024 23:27

General

  • Target

    2024-04-04_349742b3ab4daf09c2470c012ccb459b_cryptolocker.exe

  • Size

    69KB

  • MD5

    349742b3ab4daf09c2470c012ccb459b

  • SHA1

    ee66dd1161b5099c9f7a087435652bf96095279c

  • SHA256

    70fdecef5d6f3c27b338db7c14e807f0cf01568fc8e659e62411f578d228f9cd

  • SHA512

    ed3cedc8824a42548d49557a3432426099df93f7cbf090cf338cb59960cc7e3f46ec6565ee05957894c1e4942ff48a676e865089f967c453090db77d6fff5739

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs99:C4Q2c94OtEvwDpj4H8z0

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-04_349742b3ab4daf09c2470c012ccb459b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-04_349742b3ab4daf09c2470c012ccb459b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2344
    • 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:2076
  • 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=4256 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3704

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      69KB

      MD5

      ba0c3acd54c324c5273d304a45dd1ca6

      SHA1

      50054861e9f58b7852df75e8bdf44e6b72b3dce2

      SHA256

      2a9c836dd0ad9aea340c6fbd8fc564917e96b424c604c0aa6df876a08552135f

      SHA512

      b6f39cbd2875c50847f360217f5b06925fce695c8ceea5581a94ca0d9a33c2fb3c16a4ee668a9a3ff1eba362a7ee1ec4646132a86fa4c742f4820047fc699a15

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2076-19-0x00000000007F0000-0x00000000007F6000-memory.dmp

      Filesize

      24KB

    • memory/2076-18-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/2076-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2344-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2344-1-0x0000000000840000-0x0000000000846000-memory.dmp

      Filesize

      24KB

    • memory/2344-2-0x0000000000840000-0x0000000000846000-memory.dmp

      Filesize

      24KB

    • memory/2344-3-0x0000000000860000-0x0000000000866000-memory.dmp

      Filesize

      24KB

    • memory/2344-24-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB