Analysis

  • max time kernel
    141s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 17:32

General

  • Target

    2024-05-28_b28e6cc5c90ad7e35121cf7c314df4d2_cryptolocker.exe

  • Size

    57KB

  • MD5

    b28e6cc5c90ad7e35121cf7c314df4d2

  • SHA1

    9381308c5fc4205b85d25c8c128d84282c3b5623

  • SHA256

    2327a5da0792b46fabcdc0128bb808928d2cce269209df71b082e9f3688e8d05

  • SHA512

    a164b921e913ee32438fdd69dc15459965bf718c9f0e3916478956841c0fa2c01cc12f521a3e64496d24fc583758baa28e1b4a312e8cb86f25216e12c2ea9a1f

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv6dl4Gh:vj+jsMQMOtEvwDpj5HH1nw73KOFiv

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\2024-05-28_b28e6cc5c90ad7e35121cf7c314df4d2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-28_b28e6cc5c90ad7e35121cf7c314df4d2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1496
    • 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:3256
  • 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=4140 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3152

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      57KB

      MD5

      f49675efd499f4c7795ddc5229b5cec8

      SHA1

      168a0393cd942f40b55b01ea3de0f22dd17cc330

      SHA256

      7eeb9926c2af60137ba7cd567d8176df577e8109bf5cc23f666f997ac383c2f4

      SHA512

      b4df338517bf3eb28d17969a0d727aa5f4acc48b423cfc7e2bbbb7223f4e63d0c6bc972db2eec86c1a58778a1feda80730610a9e7129fdd0e5d7d1992d8e8b26

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1496-0-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/1496-1-0x0000000000520000-0x0000000000526000-memory.dmp

      Filesize

      24KB

    • memory/1496-2-0x00000000021B0000-0x00000000021B6000-memory.dmp

      Filesize

      24KB

    • memory/3256-17-0x0000000002100000-0x0000000002106000-memory.dmp

      Filesize

      24KB

    • memory/3256-23-0x00000000020D0000-0x00000000020D6000-memory.dmp

      Filesize

      24KB