Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 11:34

General

  • Target

    2024-05-21_2af8486e1f811a82fe349dfd447b3529_cryptolocker.exe

  • Size

    42KB

  • MD5

    2af8486e1f811a82fe349dfd447b3529

  • SHA1

    252817aecb794e5bc1d2f3956c30862411d13f9f

  • SHA256

    8aa3482f94b52d106a9f6e4da18b28cf2254705b957848c838093f5467d553f0

  • SHA512

    c8581acdd74f06300802233fbf244d25ab5c0d953f2b376346c5a1464fadf3cc4fb8bbb3d48fd48a020b74167dfb3bb873b775a1e7e7797f94cdfdb2b6496409

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/yYsZnt:i5nkFGMOtEvwDpjR+viHsT

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-05-21_2af8486e1f811a82fe349dfd447b3529_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_2af8486e1f811a82fe349dfd447b3529_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2240
    • 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:1432
  • 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=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1216

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      42KB

      MD5

      63d1f85e8910b2b508bf4d220e3af7f6

      SHA1

      66982da239b78b31a9b2f766166816cdb9767e54

      SHA256

      c6df8d31f8d18c2897a492d0057f7d23ff682b4c64973200733fa8ae359617b2

      SHA512

      f970aeecda44ced7938ebb84449e79b48260f02c0d7366f50be2d1f3ba81434b3f912a39475365eca2c2e1c269df0d5a759fdb162e185ef44311c2a0a56ff80a

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1432-26-0x00000000005B0000-0x00000000005B6000-memory.dmp

      Filesize

      24KB

    • memory/1432-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

      Filesize

      24KB

    • memory/1432-49-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2240-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/2240-1-0x0000000002220000-0x0000000002226000-memory.dmp

      Filesize

      24KB

    • memory/2240-2-0x0000000002220000-0x0000000002226000-memory.dmp

      Filesize

      24KB

    • memory/2240-3-0x0000000002240000-0x0000000002246000-memory.dmp

      Filesize

      24KB

    • memory/2240-19-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB