Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/03/2024, 10:28

General

  • Target

    2024-03-16_33640fd111ed9e712e343a37fa20c879_cryptolocker.exe

  • Size

    45KB

  • MD5

    33640fd111ed9e712e343a37fa20c879

  • SHA1

    b1799c279a08415bbd3986dd7cf42c8473a8a0fd

  • SHA256

    13f057dd7ed73af522b657061ce5e7c228027c50b292a2b1c8c4c818c23df4c3

  • SHA512

    e7d401b5e69e22c2e48e5a77cba5c74da0f358878e6f2cfbb9053379aed23b6d9e1000cd7bb2edcec623f47f910fd66154c2ad1739c8db547b33a4f13f8b6928

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr46xdUUa:vj+jsMQMOtEvwDpj5Hczer5iV

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\2024-03-16_33640fd111ed9e712e343a37fa20c879_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-16_33640fd111ed9e712e343a37fa20c879_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:928
  • 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=3592 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1228

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      45KB

      MD5

      2317daaf0c641b3d9213c3199d026c8e

      SHA1

      5726f59a87937f7285565c7251c65c50c8b54c40

      SHA256

      722fac55085b8b894802a912549ca67d2702d59071d2b3d696a80e180e3fc107

      SHA512

      db479ccf53bb1cb4b29a63dc0e853a6127bf66f2ea42c271ec1a869c6a73758e93d7aa6545b82b2d67d6dc7d62d8c1a6c06d5aca239345b01d01c9e494d462f7

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/928-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/928-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

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

      Filesize

      24KB

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

      Filesize

      24KB

    • memory/4244-2-0x0000000002180000-0x0000000002186000-memory.dmp

      Filesize

      24KB