Analysis

  • max time kernel
    153s
  • max time network
    173s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:50

General

  • Target

    Payment advice-BFTI_EFT7602020061514010054_18_760.exe

  • Size

    694KB

  • MD5

    d70ac7f11d7b9951801a5636b95a5f9a

  • SHA1

    a1a53eec7ac83f6cfe1cc6b5efdf3a29bda54a61

  • SHA256

    2996f332b4d95897da808e8e53b372e1a3d7537d2a0a4adc5aa47f4333a29786

  • SHA512

    0945bc22a0211b54c47acfc111f00ecc6012b6b4b6ff02e1e84968a255c29967d2710126f7a467d54acb0e7aff9168d6a9dae707ec95cb51a9210a6f5452c475

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.244.30.128:4050

Mutex

9baae9bf-6845-44fb-b19d-00e3ef120a2a

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-03-27T08:47:15.500150836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    4050

  • default_group

    face

  • 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

    9baae9bf-6845-44fb-b19d-00e3ef120a2a

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    185.244.30.128

  • 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

Signatures

  • NanoCore

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment advice-BFTI_EFT7602020061514010054_18_760.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment advice-BFTI_EFT7602020061514010054_18_760.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:916
    • C:\Users\Admin\AppData\Local\Temp\Payment advice-BFTI_EFT7602020061514010054_18_760.exe
      "C:\Users\Admin\AppData\Local\Temp\Payment advice-BFTI_EFT7602020061514010054_18_760.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:964

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/916-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
    Filesize

    8KB

  • memory/916-56-0x0000000000240000-0x0000000000248000-memory.dmp
    Filesize

    32KB

  • memory/964-55-0x000000000047D490-mapping.dmp
  • memory/964-57-0x0000000000480000-0x00000000004B8000-memory.dmp
    Filesize

    224KB

  • memory/964-58-0x0000000000480000-0x00000000004B8000-memory.dmp
    Filesize

    224KB

  • memory/964-60-0x0000000074C00000-0x00000000751AB000-memory.dmp
    Filesize

    5.7MB