Analysis

  • max time kernel
    140s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/05/2024, 19:42

General

  • Target

    2024-05-16_58fba31388ad337b6ce406652332bea1_cryptolocker.exe

  • Size

    42KB

  • MD5

    58fba31388ad337b6ce406652332bea1

  • SHA1

    fb49ab4e0830e1fceb899eb2926de602793fc3a7

  • SHA256

    0364a02b4866c99032c36362980be77242aad9a9ca2f16c438208f9965531e8e

  • SHA512

    61029f4d310fdaa2c3d8f2a2489b29a0e05eaa5f87ff19509e5d3b34f4b43b24c6c512cc5b70277d72c062141b12445bd4d782419c4f9802e1edc2e486c036e0

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/yYshNhc:i5nkFGMOtEvwDpjR+viHshNm

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 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\2024-05-16_58fba31388ad337b6ce406652332bea1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-16_58fba31388ad337b6ce406652332bea1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1880
    • 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:1020
  • 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 --field-trial-handle=4124,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=3772 /prefetch:8
    1⤵
      PID:232

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      42KB

      MD5

      86fe6a812f48145bbb22b14da43835b3

      SHA1

      73edb9dc483d30a5c1d5b5793cfb22a9b84feb27

      SHA256

      cf62d483fadec66b2ae7dfc3c44b3a87614316e09ef50baaac59c2fa9fd9e500

      SHA512

      3f84eddcc84a7c5547f4c2d17d713d60d25e3c73ce840542177d53ede6014ee774b582b053255ed5a918eae97f2073ef575bfc4c72d8b6a63afc0a15c2cf5dc9

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1020-18-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1020-26-0x0000000000560000-0x0000000000566000-memory.dmp

      Filesize

      24KB

    • memory/1020-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/1020-50-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1880-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1880-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1880-2-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/1880-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1880-17-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB