Analysis

  • max time kernel
    139s
  • 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
    03/05/2024, 22:23

General

  • Target

    2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe

  • Size

    80KB

  • MD5

    6f9eccfd46aee3f81037461555a13c42

  • SHA1

    a5011f54d35dc2301a3bb0dd1d431af22ce2bbd4

  • SHA256

    01c7e39c39f1967e32631a6d1179f97153097c63a6b7ca26a9fa877716b25d24

  • SHA512

    21f4f4f282ac406a97fe3e3603fb1748803f5442bd6f355f5266807c2416c15613c2042b5cab24a1852ad103b1c34952f3c07548aea56f93c1ee0c5c146b35f8

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QpU:zCsanOtEvwDpjq

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\2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_6f9eccfd46aee3f81037461555a13c42_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:372
    • 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:2940
  • 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=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1752

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            80KB

            MD5

            9641e5d8637249bc689c2ee2e48c4f59

            SHA1

            c0bbd5fdc203cdd64208f53c4454ab59556cf925

            SHA256

            e3d5c891c37712937f43a67585890089d9bebe0ec25fc94d6aa17d684f5cb2c2

            SHA512

            06371d8645f7eb5dac9436e0383764aad8cafcfe0ac7039e3b0d5b1d39db9611ebff520a6497165528952eea2b2457ec60593ec1936008520836dc4a33ff33ff

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

          • memory/372-0-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/372-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

            Filesize

            24KB

          • memory/372-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

            Filesize

            24KB

          • memory/372-3-0x0000000000510000-0x0000000000516000-memory.dmp

            Filesize

            24KB

          • memory/372-17-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/2940-19-0x0000000002100000-0x0000000002106000-memory.dmp

            Filesize

            24KB

          • memory/2940-25-0x0000000000570000-0x0000000000576000-memory.dmp

            Filesize

            24KB

          • memory/2940-26-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB