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Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/03/2024, 04:20

General

  • Target

    2024-03-27_f23741f0ee2f9ea1991d62b51730e2b2_cryptolocker.exe

  • Size

    149KB

  • MD5

    f23741f0ee2f9ea1991d62b51730e2b2

  • SHA1

    d2c6e1b6ff239a4053472f169b1c99e532c943ec

  • SHA256

    939173135ec998c4a7d9381707ecdb3d956eedaa95f687b342e3d4191042978f

  • SHA512

    3e4398783ec48eb9bb12352cd26d8b916d77900e6e246be1cb34f881438155eae1825e38c049061f38afb51ff8afda215019dc4c8220ae57a341660dbc746ab9

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1e2i:z6a+CdOOtEvwDpjczh

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\2024-03-27_f23741f0ee2f9ea1991d62b51730e2b2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-27_f23741f0ee2f9ea1991d62b51730e2b2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4700
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4996

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    149KB

    MD5

    2b5a04434c8556d6330cc66ea0092897

    SHA1

    873b31def73c238e0aa48b1405f07b5c589f93b6

    SHA256

    e4883421b6528d3f3ffb9e1883bb372c409f938cea1291dc583b8f508bdd4156

    SHA512

    1d13aa5725ce7f6d4d139a891620186372a406bd770a138b31f8fd2e0f9f2180e3c73ec206aff2dae5b32dc619e626e4f908f3e2bff0d0886c060654cccb3b09

  • memory/4700-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4700-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4700-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/4700-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/4700-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4996-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/4996-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/4996-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB