Analysis

  • max time kernel
    101s
  • max time network
    110s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250410-en
  • resource tags

    arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    15/04/2025, 11:42

General

  • Target

    2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe

  • Size

    389KB

  • MD5

    73625a9b5a58ff4eba3d800aa717ba4c

  • SHA1

    a32726b42671b382e9e3ee829fe505a36bb3f30b

  • SHA256

    50b01323bbe30790240291bd643e7e8609cebbf4dcb7bcc27a528900ec82700c

  • SHA512

    9bf7210b311e57147fa6d63ddc94169c7d3a7af6f5741ed03a640839beb22e8710264e769a6f79809e6a27139d5f640f488634b5a43f3d18fa30232133bf35fd

  • SSDEEP

    6144:k9WPEy3M+6qDQtUuT8QcZ2/t5YRLEcAB2ohC0NOlcAKorTHUWPVZ:hsy3VDAUuT8QQ2rYCB2oRAKyUSZ

Malware Config

Signatures

  • Detect Neshta payload 4 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Neshta family
  • Executes dropped EXE 1 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

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

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

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe"
    1⤵
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1196
    • C:\Users\Admin\AppData\Local\Temp\3582-490\2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe"
      2⤵
      • Executes dropped EXE
      PID:3148

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

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Downloads

  • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE

    Filesize

    86KB

    MD5

    3b73078a714bf61d1c19ebc3afc0e454

    SHA1

    9abeabd74613a2f533e2244c9ee6f967188e4e7e

    SHA256

    ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29

    SHA512

    75959d4e8a7649c3268b551a2a378e6d27c0bfb03d2422ebeeb67b0a3f78c079473214057518930f2d72773ce79b106fd2d78405e8e3d8883459dcbb49c163c4

  • C:\Users\Admin\AppData\Local\Temp\3582-490\2025-04-15_73625a9b5a58ff4eba3d800aa717ba4c_black-basta_cobalt-strike_elex_neshta.exe

    Filesize

    349KB

    MD5

    cd413c7f181d27a4fde866a87b42f19c

    SHA1

    9d7c94d42e5d068dea4c23c16506442cb334e172

    SHA256

    3f5a49a6e71fff308b26f09b4115d3e9f9cb9cece671c66b1f97171115ae1200

    SHA512

    0a6cb43295f7421c11d06bfc57b17d76861456c81b27924399bea514db0f6958a94e2324b4d7ef77db8f3c5c3db90022bc3c46c248f0fbc46105c69a90daaa7b

  • memory/1196-134-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1196-135-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1196-137-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB