Overview

overview

10

Static

static

final bill...20.exe

windows7_x64

10

final bill...20.exe

windows10_x64

10

Analysis

  • max time kernel
    127s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    29/06/2020, 07:37

Sharing

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General

  • Target
    final bill copy 28.6.2020.exe
  • Size 322KB
  • Sample200629-eegexdlww2
  • SHA256 cb5eb4758a41046a2f3fc084731d756aedf8ea212dc08c9bb2e6cd7f5eff6cae
  • MD5 SHA1 SHA512
Score
10/10
evasiontrojankeyloggerstealerspywarenanocorepersistence

Malware Config

Extracted

Family

  • nanocore

Version

  • 1.2.2.0

C2

  • officezafar.hopto.org:3575

  • 79.134.225.105:3575

Mutex

  • addcef97-a3fd-4088-97c4-b33550fc9a8a

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    79.134.225.105

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-03-30T16:41:31.745741536Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    3575

  • default_group

    officezafar

  • 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

    addcef97-a3fd-4088-97c4-b33550fc9a8a

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    officezafar.hopto.org

  • primary_dns_server

    8.8.8.8

  • request_elevation

    false

  • 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

Signatures

  • Suspicious behavior: EnumeratesProcesses 234 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • Uses the VBS compiler for execution 1 TTPs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spyware
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Adds Run entry to start application 2 TTPs 1 IoCs
    persistence
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

    persistence
  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • NanoCore

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

    keyloggertrojanstealerspywarenanocore

Processes

  • C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe
    "C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetThreadContext
    PID:3068
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious use of WriteProcessMemory
      • Suspicious use of AdjustPrivilegeToken
      • Drops file in Program Files directory
      • Adds Run entry to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      PID:3844
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DDP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9BF.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:688
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DDP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA4C.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3172
      • \??\c:\windows\microsoft.net\framework\v4.0.30319\vbc.exe
        "c:\windows\microsoft.net\framework\v4.0.30319\vbc.exe" /shtml "C:\Users\Admin\AppData\Local\Temp\dqyf2hrd.4hg"
        3⤵
          PID:2068
        • \??\c:\windows\microsoft.net\framework\v4.0.30319\vbc.exe
          "c:\windows\microsoft.net\framework\v4.0.30319\vbc.exe" /shtml "C:\Users\Admin\AppData\Local\Temp\a0jwckhp.zsq"
          3⤵
            PID:3140
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 3 & Del "C:\Users\Admin\AppData\Local\Temp\final bill copy 28.6.2020.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3600
          • C:\Windows\SysWOW64\choice.exe
            choice /C Y /N /D Y /T 3
            3⤵
              PID:3372

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              memory/2068-8-0x0000000000400000-0x000000000041B000-memory.dmp
              Download

              memory/2068-10-0x0000000000400000-0x000000000041B000-memory.dmp
              Download

              memory/3140-12-0x0000000000400000-0x0000000000453000-memory.dmp
              Download

              memory/3140-14-0x0000000000400000-0x0000000000453000-memory.dmp
              Download

              memory/3844-0-0x0000000000400000-0x0000000000438000-memory.dmp
              Download