General

  • Target

    payment copy.xlsx

  • Size

    2.0MB

  • Sample

    210104-mb25r6rypj

  • MD5

    4e388e3b70758d0b7ffcd0dacbff33aa

  • SHA1

    46fe4ecd5c7bf3af06b27a0cd66b41aa227e51b0

  • SHA256

    3b25c21cf19ced18be2a8e14b0e62b0452b74b5126e115d63a17c87d987ea83e

  • SHA512

    5bb678dedb9f11b93bfd3ef24fc1d4851b0088b3fc7fcb8d79b61613ae4b30534b1a2b9abc037f09f97065dd4401bfe6fa33982b286066d6b2d96d042ac3d862

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

79.134.225.87:1144

nazareen12.ddns.net:1144

Mutex

ba6cce4a-8474-40f3-8a06-f54f0d8bad9e

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    nazareen12.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-09-21T16:18:52.563488536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1144

  • default_group

    New Start

  • 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

    ba6cce4a-8474-40f3-8a06-f54f0d8bad9e

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    79.134.225.87

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Targets

    • Target

      payment copy.xlsx

    • Size

      2.0MB

    • MD5

      4e388e3b70758d0b7ffcd0dacbff33aa

    • SHA1

      46fe4ecd5c7bf3af06b27a0cd66b41aa227e51b0

    • SHA256

      3b25c21cf19ced18be2a8e14b0e62b0452b74b5126e115d63a17c87d987ea83e

    • SHA512

      5bb678dedb9f11b93bfd3ef24fc1d4851b0088b3fc7fcb8d79b61613ae4b30534b1a2b9abc037f09f97065dd4401bfe6fa33982b286066d6b2d96d042ac3d862

    • NanoCore

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

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Scripting

1
T1064

Modify Registry

2
T1112

Discovery

System Information Discovery

3
T1082

Query Registry

2
T1012

Tasks