Analysis

  • max time kernel
    133s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 03:54

General

  • Target

    2024-05-25_70d53404451461adaa8f39bccccfcf38_cryptolocker.exe

  • Size

    37KB

  • MD5

    70d53404451461adaa8f39bccccfcf38

  • SHA1

    17a89044610d5dde3caf675d8502c410b617903a

  • SHA256

    660cf5e5ce9c8537f309e92634ce06b739c14c71f79c908a826b85760c365187

  • SHA512

    4019efeea2aa3c738222d5c8cc9d53e0959e3987376dc946e5e1bdc052468cbcd184ce5b1a28e96b2d16f28875548696f6e5d841015d837b3b7c63dabfd93965

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4C:fT+hsMQMOtEvwDpjoIHC

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-25_70d53404451461adaa8f39bccccfcf38_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_70d53404451461adaa8f39bccccfcf38_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1300
    • 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:624
  • 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=3848,i,1067197275908310731,12785105794523264014,262144 --variations-seed-version --mojo-platform-channel-handle=3920 /prefetch:8
    1⤵
      PID:5012

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      37KB

      MD5

      b6dc8d90732115f4c230aab9b4664662

      SHA1

      632bf3c3e6f6df9fd5c7859e83eea9bcac0f28bd

      SHA256

      f8aaca7ffde765019bdce506f0936fb5b4bcb4655fb3605b6e53613f9e066e4c

      SHA512

      59033f2323ce4ae01a49fa0581a998a99dfd4f5627ca30c2f96c455b4173530158aafb9397b26a439c167ca044b05676b6abdf1da6087b3e9696d1e3aedf4831

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/624-17-0x00000000006D0000-0x00000000006D6000-memory.dmp

      Filesize

      24KB

    • memory/624-23-0x00000000006B0000-0x00000000006B6000-memory.dmp

      Filesize

      24KB

    • memory/1300-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1300-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/1300-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB