Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-04-2024 05:45

General

  • Target

    2024-04-11_f6665bcb4def12b9c24094998acacf07_cryptolocker.exe

  • Size

    126KB

  • MD5

    f6665bcb4def12b9c24094998acacf07

  • SHA1

    1e62adec46e6e9c4bc7f06574cc41ce94db34afa

  • SHA256

    d17aa057b87a6957540d19e1f0683e84d941809b28f136ed9964e3e14ae1898d

  • SHA512

    a3ae0af93357e4d8153ccba6af1a215d6755f11c1e4424ec6b4ad530f150cb9f5cf25ab62585afb83f555b913d627691f7052f47791379cff207d3f40a9a0494

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpn:vCA9OtEvwDpjr

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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\2024-04-11_f6665bcb4def12b9c24094998acacf07_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-11_f6665bcb4def12b9c24094998acacf07_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:368
    • 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:1640
  • 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=1328 --field-trial-handle=2260,i,11662483365823245381,11064702639240765741,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4360

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      126KB

      MD5

      596ba18a219cf00bed6e16adb9b2b925

      SHA1

      eb93c4703a5866a87782385ed03193346bed5b43

      SHA256

      c78fc9f8b87d3a2028a7cd612326b229d4708b5288d3916d6c8fa46ed677a98a

      SHA512

      f2b8ac79e96cea75012d3c3cb4a9705c14eb76061a03c328d6cea77d2ad2b6c0957a6873d598f09497d99fc01149a6b626b5b37aa238b3b35198cdae1cb49714

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/368-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

      Filesize

      24KB

    • memory/368-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

      Filesize

      24KB

    • memory/368-2-0x0000000002050000-0x0000000002056000-memory.dmp

      Filesize

      24KB

    • memory/1640-17-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

      Filesize

      24KB

    • memory/1640-22-0x0000000000570000-0x0000000000576000-memory.dmp

      Filesize

      24KB