Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/04/2024, 14:27

General

  • Target

    2024-04-29_911ab013f9f3891e9864497f379b97f4_cryptolocker.exe

  • Size

    61KB

  • MD5

    911ab013f9f3891e9864497f379b97f4

  • SHA1

    b5f3128d5181315618e3f7b634cd44ed90115610

  • SHA256

    1760b338cc0c690b7c777ccb2074a5800b01af240b90b1fc3e46fc5e4044fa68

  • SHA512

    5bbff5c6460fd40cc0a92d25e61b551c2ecffdbf44a4574872700f0d4cd38c096771cc5133046000032910c108b15bf265955ec0538589ab25034bd51d756ae5

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG99:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWM

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\2024-04-29_911ab013f9f3891e9864497f379b97f4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-29_911ab013f9f3891e9864497f379b97f4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:380
    • 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:1988
  • 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=3804 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1516

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            61KB

            MD5

            1eeda81913d752ec908dafab738a109f

            SHA1

            ed97fa5da1ad1839a515eda7687a4dc9d7b74f22

            SHA256

            45080e898e649d7ea88b2f9045dc0e540ea358e2e358c1f5e2bff4639f75a439

            SHA512

            ab427ad9ae5a290db85189e202a75d498e526a7c481bb14dea7fca4f9c80dad1db86cceb53f290eea42a10a5dbe0e1df72a5eb1c7366e8726cc5d9614e90a03c

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/380-0-0x0000000000500000-0x000000000050B000-memory.dmp

            Filesize

            44KB

          • memory/380-1-0x0000000002190000-0x0000000002196000-memory.dmp

            Filesize

            24KB

          • memory/380-2-0x0000000002190000-0x0000000002196000-memory.dmp

            Filesize

            24KB

          • memory/380-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

            Filesize

            24KB

          • memory/380-17-0x0000000000500000-0x000000000050B000-memory.dmp

            Filesize

            44KB

          • memory/1988-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/1988-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

            Filesize

            24KB

          • memory/1988-48-0x0000000000500000-0x000000000050B000-memory.dmp

            Filesize

            44KB