Analysis

  • max time kernel
    143s
  • 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
    23/04/2024, 23:27

General

  • Target

    2024-04-23_54a684fa9ae8de38d55b487c2c0f3575_cryptolocker.exe

  • Size

    65KB

  • MD5

    54a684fa9ae8de38d55b487c2c0f3575

  • SHA1

    34ae31bac09e8feca542001bd184ed3045423af5

  • SHA256

    d8483bba4ec098d5b7dca53243bac9a6457cdd0e7da2227fe8950905f0ffff2a

  • SHA512

    cdef592b880acae27821ddd8360fe0240e4310de5e12b296d2459ee65d9e573ba0f2829959ada7510e3ad9aa7249d163ae265a70b71c24ca26f068709b695c8e

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGy9:TCjsIOtEvwDpj5HE/OUHnSMYw

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\2024-04-23_54a684fa9ae8de38d55b487c2c0f3575_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-23_54a684fa9ae8de38d55b487c2c0f3575_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1348
    • 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:1632
  • 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=3872 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3920

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            65KB

            MD5

            9511a5e55e4139a986fe19dc553e8d12

            SHA1

            153495ed0a94ea9aa290515b99a395dc3d7ba959

            SHA256

            7de337d1a9aff9cd937a8fc74ce5b337adffeca006e20c811ed8af74fd26c4e1

            SHA512

            207ca651950d9f2eb03ca58e6f4f3da13886fb5d8892861b57cd266078f3d1f0a28acd2225bb98dbda3d7815c6d21b51f616d134ffa262c5b3ea9e584aebd9d4

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/1348-0-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB

          • memory/1348-1-0x0000000000660000-0x0000000000666000-memory.dmp

            Filesize

            24KB

          • memory/1348-2-0x0000000000660000-0x0000000000666000-memory.dmp

            Filesize

            24KB

          • memory/1348-3-0x0000000000720000-0x0000000000726000-memory.dmp

            Filesize

            24KB

          • memory/1348-23-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB

          • memory/1632-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

            Filesize

            24KB

          • memory/1632-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

            Filesize

            24KB

          • memory/1632-48-0x0000000000500000-0x000000000050E000-memory.dmp

            Filesize

            56KB