Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/09/2024, 23:54

General

  • Target

    2024-09-02_b5ea1df9ac47e25fa837e56be0cdf577_cryptolocker.exe

  • Size

    39KB

  • MD5

    b5ea1df9ac47e25fa837e56be0cdf577

  • SHA1

    6811bedb0dc808e0fb255b338bd1a2c3d5123973

  • SHA256

    ec95a562c9000808f82ec4b93d3aee40ce1f30dc74d8f28b6bfbd801301b7c06

  • SHA512

    7fc93eb994eba297e5bcf4bffdd6365d8fe01569142521651371d98cb499281ea5b133b910ab445bc20bdcddf1f5dd6b6017e2e1fc34e0d61ba61c41eaa352b6

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITi:qDdFJy3QMOtEvwDpjjWMl7Ti

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 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).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-09-02_b5ea1df9ac47e25fa837e56be0cdf577_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-02_b5ea1df9ac47e25fa837e56be0cdf577_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3844
  • 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 --field-trial-handle=4128,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4076 /prefetch:8
    1⤵
      PID:876

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      39KB

      MD5

      f6ef1d5202e8ff7f8eb48761fa0fec43

      SHA1

      8bbb1b98432d94579c5365e8ffe0f21729663234

      SHA256

      a7f498a2da13b4b3b60c470fa2e1d04c73d1dd3f88ddbfd4f3824737e8068d73

      SHA512

      53a1659eb0b7b9f147476a45c43a7b4344933614347c745489be4844c28fadceb946013438c498b790f19c3079f61e6f55a5cefc6bc89c54e750924a41202048

    • memory/3844-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/3844-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/3844-27-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4664-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4664-1-0x0000000000620000-0x0000000000626000-memory.dmp

      Filesize

      24KB

    • memory/4664-2-0x0000000000620000-0x0000000000626000-memory.dmp

      Filesize

      24KB

    • memory/4664-3-0x0000000000750000-0x0000000000756000-memory.dmp

      Filesize

      24KB

    • memory/4664-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB