Analysis

  • max time kernel
    142s
  • 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
    03/06/2024, 07:44

General

  • Target

    2024-06-03_c4975e854457c9f628aa386140f2fbcf_cryptolocker.exe

  • Size

    81KB

  • MD5

    c4975e854457c9f628aa386140f2fbcf

  • SHA1

    bec8be52e30c8b9c3305349ba81cb07d4d5afc9f

  • SHA256

    b7d231d5a9b1685b8fdcd0252d0ae5a6afec3969f5074ba6f1103b495deeb3a9

  • SHA512

    7dc51e640182cdf3fdbc3675d1b7a5a510b1a07755930af662b7cdee51a2e703721befef89bb0585213c086524753042755326b62204b821afde4e673331f7d6

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Q6:zCsanOtEvwDpjm

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-06-03_c4975e854457c9f628aa386140f2fbcf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_c4975e854457c9f628aa386140f2fbcf_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4888
    • 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:2776
  • 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=2720 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3532

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      81KB

      MD5

      6999ab76640afd6161238cb6f711e5ff

      SHA1

      7efb297da196375d9e44994db68d5c0bba7900b2

      SHA256

      2935d0f458973c599023b3e16064499061738d905394b9a35685f4c7f1c4bb97

      SHA512

      3651b3db01e8e574c575a0b6e599101d2c380630d5800b449b5d386822b761ed96da86cfd4460fb884cf42f3b22b42026dac786add3aa3d8ade5145da1e7fbef

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2776-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/2776-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/2776-48-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4888-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4888-1-0x0000000000740000-0x0000000000746000-memory.dmp

      Filesize

      24KB

    • memory/4888-2-0x0000000000740000-0x0000000000746000-memory.dmp

      Filesize

      24KB

    • memory/4888-3-0x0000000000760000-0x0000000000766000-memory.dmp

      Filesize

      24KB

    • memory/4888-25-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB