Analysis

  • max time kernel
    152s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 18:37

General

  • Target

    2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe

  • Size

    41KB

  • MD5

    a1911cf727fe388c5a6806262a0a78ef

  • SHA1

    67ed1ddc0eee967d8e3d894df0b1a494b91948de

  • SHA256

    96b4bd5b7368b7edebc5a515978c32be9373046ec3488cb1ae6741eb8519c548

  • SHA512

    fd617374bd764ab99e18193f1cb756f8d9bb3dea299f8b86824f74285b901434db23f49f53b9007d38f0ad1862801f1ae185f2bea2d13f0a78da9de710ca1695

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyvT:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZ6T

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\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4964
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      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=4140 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4636

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            41KB

            MD5

            830634c406589c2469c155a650eacf8c

            SHA1

            9704f506599b910e43245d77aa637d250ff70e55

            SHA256

            858d80c54c4054f77da3c66de98caa79cff6befdea99090e7c91b4d8a1818e17

            SHA512

            5ed1f6eafc4dc935f323e89a55315590a33609bf154c34f1e48b5f3612f42749dbb0a204c26170ea9a4bd132b48a96143f95c77d32c3f1abc68888f7ff69a3ff

          • memory/1640-19-0x0000000002D60000-0x0000000002D66000-memory.dmp

            Filesize

            24KB

          • memory/4964-0-0x00000000021E0000-0x00000000021E6000-memory.dmp

            Filesize

            24KB

          • memory/4964-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

            Filesize

            24KB

          • memory/4964-2-0x0000000000400000-0x0000000000406000-memory.dmp

            Filesize

            24KB