Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2024, 17:30

General

  • Target

    2024-05-29_8fbee65944f67ae4dd5595571e379463_cryptolocker.exe

  • Size

    49KB

  • MD5

    8fbee65944f67ae4dd5595571e379463

  • SHA1

    b2748c456e21353691e40fd3401f111235c5ba8b

  • SHA256

    7580bfc8346eb1b9e94b11cac1cd7e227fea0d16ca11f702ecdef950519f230d

  • SHA512

    bf5b6134873e67970c697afd5dc73596f80e99d5264d59b2a6f72d8ff5535a50d23bbe9d2a8449183e55bcad004a4910809ae6ba38becff5dd4c273396c4c0ef

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9Rva/yYsm0o:xj+VGMOtEvwDpjy+viHs7o

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-29_8fbee65944f67ae4dd5595571e379463_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-29_8fbee65944f67ae4dd5595571e379463_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5112
    • 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:2880
  • 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=4068 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4164

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            49KB

            MD5

            81701e55bea51b46eb3c704c98441ef2

            SHA1

            6382b5fc277da3cd2901669a13988e8f44f1adae

            SHA256

            71620beb5e0bc401604e6504fd815f97a2258ed5ebed502d5ba5ccbeeae14838

            SHA512

            6e5acb62053f5421a086ef9acf66c8e0ddd9e9ef8e34ee174fad621ca2e3e4b2d7a366e723a892cccedd5400e365d195ddd80d6ea5ef7617cc6e2c4fadd418e4

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/2880-18-0x0000000000680000-0x0000000000686000-memory.dmp

            Filesize

            24KB

          • memory/2880-25-0x0000000000520000-0x0000000000526000-memory.dmp

            Filesize

            24KB

          • memory/2880-48-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/5112-0-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/5112-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

            Filesize

            24KB

          • memory/5112-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

            Filesize

            24KB

          • memory/5112-3-0x0000000002050000-0x0000000002056000-memory.dmp

            Filesize

            24KB

          • memory/5112-24-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB