Analysis

  • max time kernel
    142s
  • max time network
    154s
  • 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, 01:42

General

  • Target

    2024-04-09_1312399440da65eaf905fdce7403c4b7_cryptolocker.exe

  • Size

    40KB

  • MD5

    1312399440da65eaf905fdce7403c4b7

  • SHA1

    645cdf49c7eb41691aa58c95297471a1ca3e539c

  • SHA256

    9777bff0e7bce303227f38555c75776e44b783333e7d7f242d797530a8830da5

  • SHA512

    9ad227c6d6c3ae9b2845a1ebc626c1302013faba9a51d20267fb53112b83a459b702a2f805e12ddbd23d1fa65984d829b92656090b6eb585b0bf1b205e4ad95c

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqhMWKac:6j+1NMOtEvwDpjro0

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-09_1312399440da65eaf905fdce7403c4b7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-09_1312399440da65eaf905fdce7403c4b7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1160
    • 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:856
  • 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=1348 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1936

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            40KB

            MD5

            d5a7137c66b001dcb5ed2b650659cb30

            SHA1

            31292538d17b809f1be6e018c5ab21b1b2c5fd51

            SHA256

            644bef6b02e1e0a04f2eca25b04878ab99ff06dadcb98ea9dea8688ec6892f4b

            SHA512

            95bf0cf3a5b0c9a177358611e9a21cd9a09bbae435ac254d17ba1b5d246fcaae3ec8067122a583eafbbfbba9c298166b46bb31e1508deb6fa7286e2a2602e385

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/856-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

            Filesize

            24KB

          • memory/856-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

            Filesize

            24KB

          • memory/856-48-0x0000000000500000-0x000000000050F000-memory.dmp

            Filesize

            60KB

          • memory/1160-0-0x0000000000500000-0x000000000050F000-memory.dmp

            Filesize

            60KB

          • memory/1160-1-0x0000000000570000-0x0000000000576000-memory.dmp

            Filesize

            24KB

          • memory/1160-2-0x0000000000570000-0x0000000000576000-memory.dmp

            Filesize

            24KB

          • memory/1160-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

            Filesize

            24KB

          • memory/1160-14-0x0000000000500000-0x000000000050F000-memory.dmp

            Filesize

            60KB