Analysis

  • max time kernel
    120s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    05/05/2021, 14:32

General

  • Target
    11fb001011bf92a4b8e0c6453e224718.exe
  • Size 1.1MB
  • Sample210505-n8ze91axtj
  • SHA256 f49ae8e59f9a7a9b39534eb42a7b5e5ded93ad8e59d5c9ae88fe2c69c2149ba2
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • 79.134.225.101:1012

  • nassiru1166sub.ddns.net:1012

Mutex
  • 68bddc87-6a06-4cc3-b942-56e70898a810

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    nassiru1166sub.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-02-14T09:00:39.079319436Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1012

  • default_group

    AaA

  • 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

    68bddc87-6a06-4cc3-b942-56e70898a810

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    79.134.225.101

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\11fb001011bf92a4b8e0c6453e224718.exe
    "C:\Users\Admin\AppData\Local\Temp\11fb001011bf92a4b8e0c6453e224718.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gPXZgesrUxOLvC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBE21.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1632
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1728

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/1096-60-0x0000000075281000-0x0000000075283000-memory.dmp

        memory/1096-61-0x0000000000400000-0x0000000000401000-memory.dmp

        memory/1096-62-0x0000000000401000-0x0000000000402000-memory.dmp

        memory/1728-65-0x0000000000400000-0x000000000048C000-memory.dmp

        memory/1728-68-0x0000000000730000-0x0000000000731000-memory.dmp

        memory/1728-69-0x0000000000731000-0x0000000000732000-memory.dmp