Analysis

  • max time kernel
    143s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 03:31

General

  • Target

    2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe

  • Size

    49KB

  • MD5

    3fd61b31baa1af575b0a5ad9d014cda5

  • SHA1

    97cdede891cd87abfb8fc7c681fdba2a87794c17

  • SHA256

    439758450f01d706be42f700251f74cf7d9afa81282c6c81a734cea6e0b2f8b4

  • SHA512

    c40314de5f4234eb3c952655b6c37b9bcc975f61c07ee91a9f684c98003c43511d44569fc9b93a47a73ecf5fac9f170cbcf9379cbb5ba8cb9ceafc84c3075f84

  • SSDEEP

    768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/Dpkcc1o:P6Q0ElP6G+gJQMOtEvwDpjB8WMlfL

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_3fd61b31baa1af575b0a5ad9d014cda5_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1140
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:628
  • 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=1340 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:5044

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      49KB

      MD5

      4690cce6e4a9aaf1c6619ecdac12dd99

      SHA1

      fd4e5402de2d97fe2c8a185f18760a9b398e070e

      SHA256

      56df8b1101eb19da8fc7afeb732c99dd16b982c54332819e8db142861a7fa577

      SHA512

      76d51a0e39cde24aef3622e4fe2a48dd6025fc6f33adfe35591de6e22d7acea3070a91112f8287115db20e8278c6a8c6e5767aaedc6636d43bfb12b708013f00

    • memory/628-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

      Filesize

      24KB

    • memory/628-18-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/628-26-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB

    • memory/1140-0-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB

    • memory/1140-1-0x0000000002190000-0x0000000002196000-memory.dmp

      Filesize

      24KB

    • memory/1140-2-0x0000000002190000-0x0000000002196000-memory.dmp

      Filesize

      24KB

    • memory/1140-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

      Filesize

      24KB

    • memory/1140-24-0x0000000000500000-0x000000000050B000-memory.dmp

      Filesize

      44KB