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Analysis

  • max time kernel
    137s
  • 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
    05/06/2024, 03:39

General

  • Target

    2024-06-05_775fc36ebbfcabd372f901b6951327d2_cryptolocker.exe

  • Size

    71KB

  • MD5

    775fc36ebbfcabd372f901b6951327d2

  • SHA1

    3f0b48235cad2d474c1971aa6d379ba86d057611

  • SHA256

    40f25cb7cacedea1d0f33b0ed2fbf0142fcce0dcc9dce855f2c53d29ed9aba83

  • SHA512

    3d989162151a4c55bcc5f30d7f8063d1e08055026becb49afc6e324ebb1d6c8910f3a9aa7a237ba2fdedd9a4c7a8cc640a236dcdbaac334d54a3c7ed105082a5

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs99F:C4Q2c94OtEvwDpj4H8zq

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-05_775fc36ebbfcabd372f901b6951327d2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-05_775fc36ebbfcabd372f901b6951327d2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4480
    • 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:3532
  • 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=1340 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3948

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      71KB

      MD5

      abff060008dae2a26225df4ad5e15232

      SHA1

      95017afa1f685e068578a8053075b97efc9f40b8

      SHA256

      9463551adfd6ccfef7687d9654ccb4c8eaa8eaadf788c7ae4b65cd4046af46f5

      SHA512

      25a115851ea9423100f66a78aed645160456d5c297c39e3e8fb5eb5eb3e3e553344014b8e0b6ff41580efa3e9e6f58e8acc501b43c11df126b51f69a4101b527

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/3532-19-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3532-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3532-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/4480-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4480-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

      Filesize

      24KB

    • memory/4480-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

      Filesize

      24KB

    • memory/4480-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/4480-16-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB