Analysis

  • max time kernel
    125s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/06/2024, 19:44

General

  • Target
    2024-06-12_a16f96eb70e339b48463d29d87011140_cryptolocker.exe
  • Size 81KB
  • Sample240612-yf6sfa1fll
  • SHA256 650b7a3c90cd4b77916f24d1d343798f5e8065eef75183274c708eae1e65716f
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-12_a16f96eb70e339b48463d29d87011140_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-12_a16f96eb70e339b48463d29d87011140_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:636
    • 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:3076
  • 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 --field-trial-handle=3928,i,3833046924978547022,12404847742964713612,262144 --variations-seed-version --mojo-platform-channel-handle=4244 /prefetch:8
    1⤵
      PID:1212

    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 81KB
          • SHA256 9ebef424a60ae3b76088c63e263e75adefc3bbb00d461a31f1df9bb06fa06d3f
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

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

          memory/636-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

          memory/636-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          memory/636-0-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/636-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          memory/636-17-0x0000000000500000-0x0000000000510000-memory.dmp

          memory/3076-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

          memory/3076-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

          memory/3076-46-0x0000000000500000-0x0000000000510000-memory.dmp