Analysis

  • max time kernel
    135s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 03:49

General

  • Target

    2024-05-26_a7356e3bcb6a10185eb3f1aa3d0d5364_cryptolocker.exe

  • Size

    39KB

  • MD5

    a7356e3bcb6a10185eb3f1aa3d0d5364

  • SHA1

    4d183a49c4034a633deb760f54125d510346d97b

  • SHA256

    3c8881f7ac3aac980ed85faf142a0ea52499cc04e30ec4d4d8d85b4b353c35c0

  • SHA512

    f9f25bcd5250399e9082b0396811dd3f2264afd15c8009a81e1b8f28409fd82e32f5c9b16607b6cd217a97dea7f86ab74aae0b1dd1aad00e123d86e8c8485245

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLenUX:ZzFbxmLPWQMOtEvwDpjLe6

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 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\2024-05-26_a7356e3bcb6a10185eb3f1aa3d0d5364_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_a7356e3bcb6a10185eb3f1aa3d0d5364_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4228
    • 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:3176
  • 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 --field-trial-handle=3804,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4000 /prefetch:8
    1⤵
      PID:4140

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

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

            Filesize

            39KB

            MD5

            758338dac5a86a7b4d6861ac864f9c6a

            SHA1

            da55548a0e898d7c295925e6057093f1f63cb768

            SHA256

            2bfd7aba79c53d1ecdb7645733c954a9292b999abc6a0b5d14c77f05490ef9e7

            SHA512

            f605a7ecdac1810355990f63105ec12a2c17d8f059cbbac33f9a3e9c6c0580bb519aeaf52028f24ff806a8a67faefb229f546057e5a70798cce2b547b4293a96

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/3176-24-0x0000000002080000-0x0000000002086000-memory.dmp

            Filesize

            24KB

          • memory/3176-25-0x0000000000850000-0x0000000000856000-memory.dmp

            Filesize

            24KB

          • memory/4228-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

            Filesize

            12KB

          • memory/4228-1-0x0000000000660000-0x0000000000666000-memory.dmp

            Filesize

            24KB

          • memory/4228-2-0x0000000001F70000-0x0000000001F76000-memory.dmp

            Filesize

            24KB

          • memory/4228-9-0x0000000000660000-0x0000000000666000-memory.dmp

            Filesize

            24KB

          • memory/4228-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

            Filesize

            12KB