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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    02/05/2024, 01:09

General

  • Target

    2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe

  • Size

    32KB

  • MD5

    d17a004e8e71293bb1b62009372aec4b

  • SHA1

    a4b729d22023c085731e0e5eeda230c446c911ce

  • SHA256

    d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f

  • SHA512

    14687c0bc78b72d837410e282354b1068f115a256c920b719411250feef0510169d232a8752ea05b614794c0b4d4dae91d5cb713ccd6f72e5d1a4bf5b8bf594e

  • SSDEEP

    768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXs:bFPmpiif/oc+vXs

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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).

  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:2336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\lossy.exe

    Filesize

    33KB

    MD5

    5ce73566a6771a62aed67f981e73b0ab

    SHA1

    4b1b82ecd1446068f75cb2860ab042f6efc511df

    SHA256

    c5aba6c3bdd4ab8922cc9a0bea075e45a062bfb14d289285ff0555d3518dfdfb

    SHA512

    145d92ebbf3e60f8015cc24ece58aaa4b0f06e687398b1d880599ab253f13542a9cb5d1561a0aeb67da7a0442ec1d29358a8c08c6148bf98cfeeb619a2c46a9f

  • memory/1720-0-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB

  • memory/1720-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

    Filesize

    24KB

  • memory/1720-2-0x0000000000470000-0x0000000000476000-memory.dmp

    Filesize

    24KB

  • memory/1720-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

    Filesize

    24KB

  • memory/1720-15-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB

  • memory/2336-18-0x0000000000290000-0x0000000000296000-memory.dmp

    Filesize

    24KB

  • memory/2336-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2336-26-0x0000000008000000-0x000000000800E000-memory.dmp

    Filesize

    56KB