Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 13:44

General

  • Target

    2024-03-28_94f08b3affe75a174e8ec84b6c69a3a9_cryptolocker.exe

  • Size

    102KB

  • MD5

    94f08b3affe75a174e8ec84b6c69a3a9

  • SHA1

    53426779be359b537315d49f88de4f38c6ec560d

  • SHA256

    ef449f181e275e4fff4832ab44bdf1d1507a559e3a96ec4e0a83c43d21821a2c

  • SHA512

    aa1b2186ddd53d84ed99a8a4062b0a5364d8d9b5a4bb3c403a3da9a12fe66df28c1dfd1c8ec625013334577afc9095b940fdc7cb4f17d27d6b2f56b437352787

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2mwVez4:xj+VGMOtEvwDpjubwQEIiVmkxv/CU

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-28_94f08b3affe75a174e8ec84b6c69a3a9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_94f08b3affe75a174e8ec84b6c69a3a9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3820
    • 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:4180
  • 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=3688 --field-trial-handle=2320,i,3025503729105798828,9325691672526736153,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1788

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            103KB

            MD5

            070bc02864636197bd6eec8649413bbe

            SHA1

            35b6cdb9dfe2ce609771a982666ada0f11e371c2

            SHA256

            fbd2a597684be3a540074be9f4297f78e74e11a3f95def582f52bf702d037902

            SHA512

            9373c6f76021cdc1a22e01b138c04463c04ba5ba743b58509fbf67b18d0e85c3f77929cbb2051019ba0c16648d0c30d7895569f9549c127eceb973412f8b3a01

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/3820-0-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/3820-1-0x0000000000520000-0x0000000000526000-memory.dmp

            Filesize

            24KB

          • memory/3820-2-0x0000000000520000-0x0000000000526000-memory.dmp

            Filesize

            24KB

          • memory/3820-3-0x0000000000680000-0x0000000000686000-memory.dmp

            Filesize

            24KB

          • memory/3820-17-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/4180-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

            Filesize

            24KB

          • memory/4180-22-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/4180-48-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB