Overview

overview

10

Static

static

8

Ref671005018.xls

windows7-x64

8

Ref671005018.xls

windows10-2004-x64

10

Sharing

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General

  • Target

    Ref671005018.xla

  • Size

    232KB

  • Sample

    221027-k67wjabgap

  • MD5

    169f284d5cb718718ef756d97e962d66

  • SHA1

    f83c9e72f5d03e30e8d99b8ac3a7ea9e3ab98960

  • SHA256

    f9068e24dc32b9314c21966284886537051e1ea8b7044772489a99c4906925af

  • SHA512

    fd82a9a0044be3eb01b95dd5de63b0ac57072cf67fc2959ac1180f22f7ed5375ba9178e37b2fe3c2ddabe883aadb90e85d77c19406af1c5c41861d2d4bd34c26

  • SSDEEP

    6144:yk3hOdsylKlgryzc4bNhZF+E+W2knA1ADM/NuNNFNNXNNuNNdNNPNNaNNbNNWNNb:GAcNuNNFNNXNNuNNdNNPNNaNNbNNWNNb

Score
10/10
agentteslananocorecollectionkeyloggermacromacro_on_actionpersistencespywarestealertrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

37.139.128.94:6000

Mutex

407839af-e81b-4512-9071-482887f971db

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-08-07T10:00:20.190590236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    6000

  • default_group

    client

  • 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

    407839af-e81b-4512-9071-482887f971db

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    37.139.128.94

  • 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

Targets

    • Target

      Ref671005018.xla

    • Size

      232KB

    • MD5

      169f284d5cb718718ef756d97e962d66

    • SHA1

      f83c9e72f5d03e30e8d99b8ac3a7ea9e3ab98960

    • SHA256

      f9068e24dc32b9314c21966284886537051e1ea8b7044772489a99c4906925af

    • SHA512

      fd82a9a0044be3eb01b95dd5de63b0ac57072cf67fc2959ac1180f22f7ed5375ba9178e37b2fe3c2ddabe883aadb90e85d77c19406af1c5c41861d2d4bd34c26

    • SSDEEP

      6144:yk3hOdsylKlgryzc4bNhZF+E+W2knA1ADM/NuNNFNNXNNuNNdNNPNNaNNbNNWNNb:GAcNuNNFNNXNNuNNdNNPNNaNNbNNWNNb

    Score
    10/10
    persistenceagentteslananocorecollectionkeyloggerspywarestealertrojan

    • AgentTesla

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

      keyloggertrojanstealerspywareagenttesla

    • NanoCore

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

      keyloggertrojanstealerspywarenanocore

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

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

    • Drops startup file

    • Loads dropped DLL

    • Accesses Microsoft Outlook profiles

      collection

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks