Analysis

  • max time kernel
    137s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/06/2024, 08:35

General

  • Target
    2024-06-08_ce4112a9b0b825ce39e7e44d41fa9027_cryptolocker.exe
  • Size 49KB
  • Sample240608-khdyjsbd78
  • SHA256 e9378f7b5b252f6033e5d9d5246719d1f271554bc2868842a6baf178d87a2d40
  • MD5 SHA1 SHA512 SSDEEP
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\2024-06-08_ce4112a9b0b825ce39e7e44d41fa9027_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-08_ce4112a9b0b825ce39e7e44d41fa9027_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4244
    • 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:3276
  • 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=3972 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1072

    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 49KB
          • SHA256 53522f5734a6599f5863fbc2c61fd9e96b033135ae1e5aff16d75fc247d8b69e
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

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

          memory/3276-17-0x0000000002070000-0x0000000002076000-memory.dmp

          memory/3276-23-0x00000000005B0000-0x00000000005B6000-memory.dmp

          memory/4244-0-0x0000000002280000-0x0000000002286000-memory.dmp

          memory/4244-1-0x0000000002280000-0x0000000002286000-memory.dmp

          memory/4244-2-0x0000000002190000-0x0000000002196000-memory.dmp