Analysis

  • max time kernel
    153s
  • max time network
    43s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    25/07/2022, 20:32

General

  • Target
    NEW PURCHASE ORDER AND SPECIFICATION.exe
  • Size 737KB
  • Sample220725-za94caabdk
  • SHA256 8dc19fdc6a2f27ae650d8868ddf42b3f9f9ce2cd517c74f7ba524656e2a68262
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • uyeco.pw:59066

  • 127.0.0.1:59066

Mutex
  • f8d3f7fb-a017-4255-8ee1-f7099245c62d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-03-07T13:49:51.938097736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    59066

  • default_group

    Default

  • 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

    f8d3f7fb-a017-4255-8ee1-f7099245c62d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    uyeco.pw

  • 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 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEW PURCHASE ORDER AND SPECIFICATION.exe
    "C:\Users\Admin\AppData\Local\Temp\NEW PURCHASE ORDER AND SPECIFICATION.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:944
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tmDJyCIKI.exe"
      2⤵
        PID:1312
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tmDJyCIKI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp567A.tmp"
        2⤵
        • Creates scheduled task(s)
        PID:1964
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        2⤵
          PID:1748

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            tmp567A.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmp567A.tmp
            • Size 1KB
            • SHA256 a8f5a72e53d586cdcb70ec53a3f4b41e463786669295e11c3608a71477e3c546
            • MD5 SHA1 SHA512

            memory/944-63-0x0000000005680000-0x00000000056F2000-memory.dmp

            memory/944-56-0x0000000000780000-0x000000000079E000-memory.dmp

            memory/944-57-0x00000000007B0000-0x00000000007BA000-memory.dmp

            memory/944-58-0x0000000005120000-0x00000000051C8000-memory.dmp

            memory/944-55-0x0000000075241000-0x0000000075243000-memory.dmp

            memory/944-54-0x00000000000E0000-0x000000000019E000-memory.dmp

            memory/1312-77-0x000000006E9A0000-0x000000006EF4B000-memory.dmp

            memory/1748-65-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-64-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-68-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-70-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-67-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-73-0x0000000000400000-0x0000000000438000-memory.dmp

            memory/1748-75-0x0000000000400000-0x0000000000438000-memory.dmp