Analysis

  • max time kernel
    143s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/04/2024, 21:34

General

  • Target

    2024-04-23_666c8cb1dedbb828a52e199751417329_cryptolocker.exe

  • Size

    86KB

  • MD5

    666c8cb1dedbb828a52e199751417329

  • SHA1

    a6c66651e58ca2ce0a4ac017a198aaeb201996c4

  • SHA256

    9ddf0a2a0aecd80f7021a9679ba9cf25abb72712dad795068a3ef131713f961c

  • SHA512

    ef43ce2ea5203a77db40a6cba01a8ef1b41b63e36e547e6f01ac4ea644b8f0bc0e063d96276afea8ab68d3cd1bcc33a0e68ef847fc373efeab0b4623d2ac9b76

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1/E:zCsanOtEvwDpjS

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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\2024-04-23_666c8cb1dedbb828a52e199751417329_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-23_666c8cb1dedbb828a52e199751417329_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4620
    • 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:4848
  • 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=3104 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:5296

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      86KB

      MD5

      57c17faecff264676a81bc347125bb35

      SHA1

      ed0242187afcf7a5081364542dce14c56f56e7ef

      SHA256

      75abf68ea9e4e0d196948ec28e4e1bd26b1749702195313ee874179b1a9ce14c

      SHA512

      1b1697880002ae114fa28feb528891d7cacf24267a8a71de1bf165cf08e6516f6eff67a1e302443b3a2983b0ce47438024a750b5dd0efb09ec1721a9d6366c05

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/4620-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4620-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4620-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4620-3-0x00000000005F0000-0x00000000005F6000-memory.dmp

      Filesize

      24KB

    • memory/4620-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4848-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/4848-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/4848-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB