Analysis

  • max time kernel
    146s
  • 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
    09-04-2024 04:28

General

  • Target

    2024-04-09_df6c50045aa210eddf7e8921b15cf2d9_cryptolocker.exe

  • Size

    92KB

  • MD5

    df6c50045aa210eddf7e8921b15cf2d9

  • SHA1

    fecc2f342ffa60246ae398f90180eabe02ec4144

  • SHA256

    22069f7e35e5dbda6bfbfab10964a2cd4bab42277d0f3e29079a46a6f7751316

  • SHA512

    3e10fe15f045644b8a9db55a9b35bbe79039580a3c056469b5a6af73f2a256448607f0b9e2655f6a9fc99a93b88ae73bc21473e82998473438d227db940e31f0

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjhWV:zCsanOtEvwDpjF

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\2024-04-09_df6c50045aa210eddf7e8921b15cf2d9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-09_df6c50045aa210eddf7e8921b15cf2d9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:552
    • 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:1392
  • 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=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4916

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      92KB

      MD5

      307daa9ce4aea1936f5f96cb7d97b2e5

      SHA1

      46e6007285b33e1be18367d9327af885fa57f3b8

      SHA256

      2f2d5dbeb8c1378a3c9b3202c18363598e71402f3b798697ce58eb61593bbb1f

      SHA512

      962f566e25f2f9a16da300dc8df17af57879c93e393179918f0fb184c50f95649e8820d427693e17a0f75c3d7af4ec5a96933c6548bf0bc459150dad959421f6

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/552-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/552-1-0x0000000000830000-0x0000000000836000-memory.dmp

      Filesize

      24KB

    • memory/552-2-0x0000000000830000-0x0000000000836000-memory.dmp

      Filesize

      24KB

    • memory/552-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

      Filesize

      24KB

    • memory/552-19-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1392-18-0x0000000002110000-0x0000000002116000-memory.dmp

      Filesize

      24KB

    • memory/1392-20-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

      Filesize

      24KB

    • memory/1392-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB