Analysis

  • max time kernel
    146s
  • 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
    04-05-2024 02:22

General

  • Target

    2024-05-04_05e3ffb442e00d264944704f68d9e6b2_cryptolocker.exe

  • Size

    84KB

  • MD5

    05e3ffb442e00d264944704f68d9e6b2

  • SHA1

    e2fa0751403615071f83cdd771d38bbed249f675

  • SHA256

    8209f427443726197099818e7b8a15290005cbfb1136b5980d5f479bb1e25817

  • SHA512

    94c5446d96f7344caad1d0d6629e725402f18431d82612ab7a4e052af5c6c266ab633557eee2fb288b0270263495d2e319a8e65ddc69cfb74beda571fd0ab7de

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfWafHNBY:vCjsIOtEvwDpj5H9YvQd2Q

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\2024-05-04_05e3ffb442e00d264944704f68d9e6b2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_05e3ffb442e00d264944704f68d9e6b2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4436
    • 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:2152
  • 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=4112 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4332

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      85KB

      MD5

      52166a9e495b27ed532eeee0214af450

      SHA1

      0eac83ae8c084d8fda106d55202f592593dc0524

      SHA256

      8a776589b8cc64be8224d00beb9def6e6cd32f50d7f49bcde70b821be09c6729

      SHA512

      fb3d140078a6e8409d159974fc4a5a9780106a8e65a8c7957f8ced09348b7d01ba6e513fcaaa696dd0545c600f7f85bd113473e1614c80862be255d92aa7d2b2

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2152-17-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/2152-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/4436-0-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/4436-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/4436-2-0x0000000000600000-0x0000000000606000-memory.dmp

      Filesize

      24KB