Analysis

  • max time kernel
    167s
  • max time network
    196s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-10-2022 20:05

General

  • Target

    17a2a95dfa55c776ca3851613c0e4cf34dccbc0a13f3f97c749d3d75e5845a48.exe

  • Size

    143KB

  • MD5

    917ab8733f840d052d552bb3766fd926

  • SHA1

    bf71e255ec62cc497796e4a030f221407efeece9

  • SHA256

    17a2a95dfa55c776ca3851613c0e4cf34dccbc0a13f3f97c749d3d75e5845a48

  • SHA512

    56f533cb1fafbb647510424d4affd6dbe6725d0350176086db41ab8b51998efeeda2a03b8458e35c7a8aef86177aff7138f732aa89e702ffd9cd1c61f366fcc3

  • SSDEEP

    3072:runHgXqb+ixUyl/Gojn3TQNh71B3JkLrB:Y+Y7njn3Tst3CL

Malware Config

Extracted

Family

nanocore

Attributes
  • activate_away_mode

    false

  • backup_connection_host

  • backup_dns_server

  • buffer_size

    0

  • build_time

    0001-01-01T00:00:00Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    0

  • connection_port

    0

  • default_group

  • enable_debug_mode

    false

  • gc_threshold

    0

  • keep_alive_timeout

    0

  • keyboard_logging

    false

  • lan_timeout

    0

  • max_packet_size

    0

  • mutex

  • mutex_timeout

    0

  • prevent_system_sleep

    false

  • primary_connection_host

  • primary_dns_server

  • request_elevation

    false

  • restart_delay

    0

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    false

  • timeout_interval

    0

  • use_custom_dns_server

    false

  • version

  • wan_timeout

    0

Signatures

  • NanoCore

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

  • Drops startup file 1 IoCs
  • Unexpected DNS network traffic destination 7 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\17a2a95dfa55c776ca3851613c0e4cf34dccbc0a13f3f97c749d3d75e5845a48.exe
    "C:\Users\Admin\AppData\Local\Temp\17a2a95dfa55c776ca3851613c0e4cf34dccbc0a13f3f97c749d3d75e5845a48.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4748
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • Checks whether UAC is enabled
      PID:736

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/736-134-0x0000000000000000-mapping.dmp

  • memory/736-135-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/736-136-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/736-137-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/4748-132-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB

  • memory/4748-133-0x0000000074D20000-0x00000000752D1000-memory.dmp

    Filesize

    5.7MB