Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 11:43

General

  • Target
    2024-06-03_c18f1cdffa4a9fa36401f2d5ccc652d3_cryptolocker.exe
  • Size 73KB
  • Sample240603-nv2f6aee79
  • SHA256 dc8715ba24d5e8ebaa304c3871d1da65ad9e7f613cc5a9f299290b7fb2a16cd6
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 5 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_c18f1cdffa4a9fa36401f2d5ccc652d3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_c18f1cdffa4a9fa36401f2d5ccc652d3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2252
    • 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:4280
  • 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=4148 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:552

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          misid.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
          • Size 73KB
          • SHA256 cdd1386910a27b20905bada2197873c3df39ee1089bbb939c4ff39ba24d12419
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misids.exe
          • Size 315B
          • SHA256 d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3
          • MD5 SHA1 SHA512

          memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/2252-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          memory/2252-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

          memory/2252-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

          memory/2252-26-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/4280-17-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/4280-19-0x0000000002000000-0x0000000002006000-memory.dmp

          memory/4280-49-0x0000000000500000-0x0000000000510000-memory.dmp