Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/03/2024, 12:43

General

  • Target

    2024-03-05_038713948dc8810b76376de226f0141c_cryptolocker.exe

  • Size

    94KB

  • MD5

    038713948dc8810b76376de226f0141c

  • SHA1

    b70b106e4a5e32ebd67f9ce0dd4b1dc05317ba37

  • SHA256

    3cae7054ea341e98b94ca33d6d097b0d88572cd7bd2d0beccde89f6be8d87054

  • SHA512

    ee248a4b197528ccc5690cb24670d02e6d97d6d79e1b2de66e8482d39f2fceee68887b9a7ff9bbd309b865b1360cafc9cc57f71707ff22d537d07acb5673b9d2

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJhl:xj+VGMOtEvwDpjubwQEIiVmk3

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-03-05_038713948dc8810b76376de226f0141c_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_038713948dc8810b76376de226f0141c_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2892
    • 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:636
  • 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=4220 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3336

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            94KB

            MD5

            cc4583100e094cdd0729a2bd511b3ded

            SHA1

            822da8aabe4368386b7ea4ed549c0adec5ad7219

            SHA256

            a3789f8511655697819f030dad4bdcebc9d424c09a88c5dc0ef3894d1a62d3a5

            SHA512

            e8ca84d3b48ca9bed884190fe4dc13ac95a3ff03023931b9d31ac85f7800cb228dc5d4cd73760263ea330575aa98014b4fcc439a62a3cd9d3decc3be6eb8ebf6

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

            Filesize

            315B

            MD5

            a34ac19f4afae63adc5d2f7bc970c07f

            SHA1

            a82190fc530c265aa40a045c21770d967f4767b8

            SHA256

            d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

            SHA512

            42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

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

            Filesize

            64KB

          • memory/636-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

            Filesize

            24KB

          • memory/636-48-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/2892-0-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/2892-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/2892-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

            Filesize

            24KB

          • memory/2892-3-0x00000000007E0000-0x00000000007E6000-memory.dmp

            Filesize

            24KB

          • memory/2892-25-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB