Analysis

  • max time kernel
    134s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-05-2024 21:36

General

  • Target

    2024-05-27_b3e27123dca267c3532a9466d438ef0f_cryptolocker.exe

  • Size

    40KB

  • MD5

    b3e27123dca267c3532a9466d438ef0f

  • SHA1

    39a9e2452f305d60ee8a7f396afdc760d708e781

  • SHA256

    068a757e0be54e3c5bfbf72b0352dc0fa662d56eb190f5651a3a63844affcf9b

  • SHA512

    3cc4bbec2f0ca988f34fce385c361c5fb99ae8c26072a2d6ccf6956caece7a2f9f9822dc02ab133855511bb8b5d0f3c641101c072b1f07cfb5da705c1741c723

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLeJAsKuD+l:ZzFbxmLPWQMOtEvwDpjLeJAsKcY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-27_b3e27123dca267c3532a9466d438ef0f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_b3e27123dca267c3532a9466d438ef0f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2044
    • 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:744
  • 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=4356,i,5047420736443372512,9747851268033796534,262144 --variations-seed-version --mojo-platform-channel-handle=4404 /prefetch:8
    1⤵
      PID:4440

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      41KB

      MD5

      ff21b7911c27b2568320ea5015ce801a

      SHA1

      cd3d655a0c03b014053359d7b4110ee3f6123f50

      SHA256

      8c23882ac04914ad0e08058d52ff997dcba1228836f56ea4dcc62955ddfdc50c

      SHA512

      c22c1a79bc2cdffceee9546cce64f3bf571b96bc01c67569831f17c82a33a1d9e2a60da25258e1e8922da578f8096a1e5cddaa2a5c0703d578c6f423e48d7b9f

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/744-17-0x0000000000450000-0x0000000000490000-memory.dmp

      Filesize

      256KB

    • memory/744-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/744-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/2044-0-0x0000000000490000-0x0000000000493000-memory.dmp

      Filesize

      12KB

    • memory/2044-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/2044-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/2044-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/2044-18-0x0000000000490000-0x0000000000493000-memory.dmp

      Filesize

      12KB