General

  • Target

    954d2c18ef0e7d5dbbded7e1a565e6eeb9007347ab22a1448000363d2269fb8a

  • Size

    2.1MB

  • Sample

    221110-syy8esahf2

  • MD5

    3ea3298d807b865a2efd07a9fb0f3d3b

  • SHA1

    6f5fe17c8077679be4c5f0f03e4565dc981e6ae5

  • SHA256

    954d2c18ef0e7d5dbbded7e1a565e6eeb9007347ab22a1448000363d2269fb8a

  • SHA512

    728eecbd2f4c47cfcc5fd82dc3673fd3a965e76212233ea2228285100fb2c680d4269b70e7ccc03eb54d532512fbc97edc232aeed80b39d7a657b0c1ac935aa4

  • SSDEEP

    49152:prY2CCChx9+7Wll5qqTg0lvgtsfzdj2RJhrdQ:prYiAx9Rll53TgIH7dj25hQ

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

rze6.sytes.net:8000

Mutex

0aeffa29-f3e3-4c27-b5c4-5ee7e27a451f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-07-19T10:27:50.574421636Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8000

  • default_group

    OCT

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    0aeffa29-f3e3-4c27-b5c4-5ee7e27a451f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    rze6.sytes.net

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Extracted

Family

agenttesla

C2

http://195.178.120.72/3ip/inc/523ecb38582a9c.php

Targets

    • Target

      954d2c18ef0e7d5dbbded7e1a565e6eeb9007347ab22a1448000363d2269fb8a

    • Size

      2.1MB

    • MD5

      3ea3298d807b865a2efd07a9fb0f3d3b

    • SHA1

      6f5fe17c8077679be4c5f0f03e4565dc981e6ae5

    • SHA256

      954d2c18ef0e7d5dbbded7e1a565e6eeb9007347ab22a1448000363d2269fb8a

    • SHA512

      728eecbd2f4c47cfcc5fd82dc3673fd3a965e76212233ea2228285100fb2c680d4269b70e7ccc03eb54d532512fbc97edc232aeed80b39d7a657b0c1ac935aa4

    • SSDEEP

      49152:prY2CCChx9+7Wll5qqTg0lvgtsfzdj2RJhrdQ:prYiAx9Rll53TgIH7dj25hQ

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • NanoCore

      NanoCore is a remote access tool (RAT) with a variety of capabilities.

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks