Analysis

  • max time kernel
    151s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-04-2024 14:49

General

  • Target

    2024-04-08_a5f9718baff1bcbaff5405c28ac8d686_cryptolocker.exe

  • Size

    49KB

  • MD5

    a5f9718baff1bcbaff5405c28ac8d686

  • SHA1

    4d4a7867fc2eab44c99b987902716b9a0db7b34d

  • SHA256

    19e48c26d9243f90ec6b72462211509a5cf94bd32d7d6e0ea528a1b154fb1724

  • SHA512

    bcdc2eb00fb31e969924ea51e0928de6eb90111a9189205682ca90b9bdfd6faafa8317f85835897febaca7fd926e6953db4bbc97e25b9e49d2f728252bf1fc8d

  • SSDEEP

    768:bgX4zYcgTEu6QOaryfjqDlC6JFbK37YbDu5z/hvvkD98i:bgGYcA/53GAA6y37nby8i

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-08_a5f9718baff1bcbaff5405c28ac8d686_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_a5f9718baff1bcbaff5405c28ac8d686_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Users\Admin\AppData\Local\Temp\hasfj.exe
      "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
      2⤵
      • Executes dropped EXE
      PID:1392
  • 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=4456 --field-trial-handle=2252,i,3429015581403167983,2708022432612919502,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1784

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      49KB

      MD5

      b314b981e8bc2dd6fcee610419ba994a

      SHA1

      43e68266821f10b4038578effc1a09dded755851

      SHA256

      cf3901ee9a7657cbb504011a6dfaf610dac3a860c8e56a792c9bed797861864a

      SHA512

      2927f3f6654e302c5aa680dc6c1357e472f4d896e94d1aaff480ff23e8ef3d19153ea56892ad93fb0cedca2d9275e411582406ba11e9b9a4a210f752b800c3ce

    • memory/1392-17-0x0000000003010000-0x0000000003016000-memory.dmp

      Filesize

      24KB

    • memory/1392-18-0x0000000000700000-0x0000000000706000-memory.dmp

      Filesize

      24KB

    • memory/3044-0-0x00000000021E0000-0x00000000021E6000-memory.dmp

      Filesize

      24KB

    • memory/3044-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

      Filesize

      24KB

    • memory/3044-2-0x0000000003150000-0x0000000003156000-memory.dmp

      Filesize

      24KB