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
    23-05-2024 04:30

General

  • Target

    2024-05-23_844d240fae1e85902588ac0d8e6069f1_cryptolocker.exe

  • Size

    85KB

  • MD5

    844d240fae1e85902588ac0d8e6069f1

  • SHA1

    b998a7b487eee4a7eabe0ba96ec3abe739e4460a

  • SHA256

    a8ccf574b0357823dc2b9be7ed9d9fc216619cd6c126d4ee9106b6de60cfefbf

  • SHA512

    8549c55dfcfe2a4f2e85118e2fad7f32a4894d4b23670e891865669a6b3d375687c76c5a0ef9deaf26202624ddaf04224b242202c71f1174b0cab0d41a30b76c

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrC+v:TCjsIOtEvwDpj5HE/OUHnSM5

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-23_844d240fae1e85902588ac0d8e6069f1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_844d240fae1e85902588ac0d8e6069f1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1184
    • 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:1356
  • 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=3892 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4692

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      85KB

      MD5

      050c4c237eca4faee236a9a1d050af32

      SHA1

      44364d6a951dea128342e66cf63c9b974998368c

      SHA256

      b0cdab21660ed29bcfe3be2cf725478bfc2852208fbcfa250a4d9f6521340a31

      SHA512

      0a965fb7c856fb06e17665b05f0128f9e07a41525d44a553f4deb283daa085730da421748ea10a323f7c06c01a67609bb80b9d57313cc6f2746492055a2e468b

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1184-0-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/1184-1-0x00000000006F0000-0x00000000006F6000-memory.dmp

      Filesize

      24KB

    • memory/1184-2-0x00000000006F0000-0x00000000006F6000-memory.dmp

      Filesize

      24KB

    • memory/1184-3-0x0000000000710000-0x0000000000716000-memory.dmp

      Filesize

      24KB

    • memory/1184-25-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/1356-18-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

      Filesize

      24KB

    • memory/1356-24-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

      Filesize

      24KB

    • memory/1356-48-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB