Analysis

  • max time kernel
    138s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/05/2024, 18:38

General

  • Target

    2024-05-11_822ea40e6098d850f04add21dee6546e_cryptolocker.exe

  • Size

    66KB

  • MD5

    822ea40e6098d850f04add21dee6546e

  • SHA1

    f61b5858ea43b3dc71f78684206088c6a179d44e

  • SHA256

    3cbac95afcb4d4ad28ba8bbdfc4d29df8b7db99b44d5716884794114778ab0ff

  • SHA512

    21b054157571e76ed016ddf356d8a64c529beb55230622d19220a3e838b0f6e93eb12256fd46e1338a60c7238c238ef2ea9df35be1f57ac8afd9424100c827f3

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyz:TCjsIOtEvwDpj5HE/OUHnSMYA

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-11_822ea40e6098d850f04add21dee6546e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_822ea40e6098d850f04add21dee6546e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2112
    • 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:3504
  • 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=4088 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4616

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      66KB

      MD5

      9d7582faf00e91c2d51e6d3b74f27243

      SHA1

      f8b9fb31770dfa4012543f2101091034ccc36244

      SHA256

      a30e3bb01144cbee12c3bb7cb5ba2a1101f3c5e7abf4f924d25e8ae6d7f69411

      SHA512

      47ba2d170a4b32b3c14bed5c2cd347f9d2ff344e0470b33a02afba4b69f50185d3ffcf07b0175dd3409fdbce39822a169b7217c053cc4aab6ad33651cd3083b6

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2112-0-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/2112-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

      Filesize

      24KB

    • memory/2112-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

      Filesize

      24KB

    • memory/2112-3-0x0000000000610000-0x0000000000616000-memory.dmp

      Filesize

      24KB

    • memory/2112-14-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/3504-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3504-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3504-48-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB