Analysis

  • max time kernel
    142s
  • 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
    26/05/2024, 10:53

General

  • Target

    2024-05-26_c4fffff83e7e3bf0d8ae39f4fb1ab7bc_cryptolocker.exe

  • Size

    92KB

  • MD5

    c4fffff83e7e3bf0d8ae39f4fb1ab7bc

  • SHA1

    4fee5fdf7c008b5c3f587de567cfe5e3e13f898a

  • SHA256

    360f7bed15387f6c887a4c8aa7fc116fcb032b95133a2c7d5fe5bff2431aafcb

  • SHA512

    d64c072292e0b1617f62d34fe541c4ae65833cd3f61bdabdfde93792470fd87c4c0baacc69f6823b5cf0e4010948a81823875b6dbbf9290bdc30477d54b70876

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5H8u8rBN6nqEZNi1OkQNpZYrsD:vCjsIOtEvwDpj5H8zPszD

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\2024-05-26_c4fffff83e7e3bf0d8ae39f4fb1ab7bc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_c4fffff83e7e3bf0d8ae39f4fb1ab7bc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2104
    • 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:4548
  • 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=4244 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1148

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            93KB

            MD5

            504faea8d12b3750d6f3162884840beb

            SHA1

            209d7c13786785908837a41bc7de5d8e99638954

            SHA256

            a33b24926833610bd0f41c078731f34e623de0152fab84817649f9eee0b1fbfe

            SHA512

            0904ededc8a25ffc9292720a844191192462a56fa32cd39188e30b68dfbddb5ad806ff5a93c04ffa38f791cab29cc8aae46371f60accdabdb827d34f1e34ae5c

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/2104-0-0x00000000006E0000-0x00000000006E6000-memory.dmp

            Filesize

            24KB

          • memory/2104-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

            Filesize

            24KB

          • memory/2104-2-0x0000000000890000-0x0000000000896000-memory.dmp

            Filesize

            24KB

          • memory/4548-17-0x0000000000510000-0x0000000000516000-memory.dmp

            Filesize

            24KB

          • memory/4548-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

            Filesize

            24KB