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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/03/2024, 04:02

General

  • Target

    2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe

  • Size

    61KB

  • MD5

    dfa1e903dee9e210869a60ca70b2eaeb

  • SHA1

    5e0436c4c91900c7425da5da0e6716387ca7e228

  • SHA256

    4dc404f515009bb71a872b5af70b3216c61a004a8f381eeed9f2f1e858d39a82

  • SHA512

    4d3780d7a2766c122c63e1a8ca5bbe59f5ad32046e721d65a25b1d980ecb5705b009c0817d0d676d58bc9a46201737b29ca7d5d3b5af00fe299a9c3f85a8c6ee

  • SSDEEP

    768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J59l:T6QFElP6n+gxmddpMOtEvwDpjwa39l

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 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-26_dfa1e903dee9e210869a60ca70b2eaeb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2244
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4296

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    61KB

    MD5

    b628f41eebba3b6eb3b753e18e7a75a3

    SHA1

    e717e9f6388f6a90b6f20216081fe0b6721c8ec8

    SHA256

    61b13cf8cb109180d3bc1e73d2c155e3e8ddbb2dc363464bbd0b4f6f0c8eaff6

    SHA512

    aeef63e8a1a622438de55e9021374e38055f198bedb4aa6ce35af6c07e9d1e2842c4fe91b0f0d38fbadef68cf664b5279bae79d878d32e33c0df18dd3815429c

  • memory/2244-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2244-1-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/2244-2-0x0000000000670000-0x0000000000676000-memory.dmp

    Filesize

    24KB

  • memory/2244-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/2244-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4296-19-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/4296-21-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4296-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB