Overview

overview

10

Static

static

file.exe

windows7_x64

10

file.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    153s
  • max time network
    206s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 01:57

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General

  • Target

    file.exe

  • Size

    478KB

  • MD5

    17474288d46bec313d81e0c0a418ebce

  • SHA1

    98eec9e6b8ad986077e96071112db24ee0ce118a

  • SHA256

    f036e2aa7615446d2cb3ab689b13aac4055bf2cb8b19b0999db08d7052a80bf1

  • SHA512

    ca1f2d3a3b07802811b59c8b1a848c9910feafdf7c16b460e6972e243460d17d9669d277f97f79ecad3ba0f38917422ee6b63b1e064a20c0f9cea595799ff22e

Score
10/10
nanocoreevasionkeyloggerpersistencespywarestealertrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

megida123.ddns.net:9900

Mutex

64aa071e-5b44-426b-ad7e-e6d42b713d32

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-03-01T17:02:01.784418836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    9900

  • default_group

    00000

  • 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

    64aa071e-5b44-426b-ad7e-e6d42b713d32

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    megida123.ddns.net

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • 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

  • NanoCore

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

    keyloggertrojanstealerspywarenanocore
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 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.

    persistence
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3692
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GHjTzl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp70E5.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3220
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4848

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp70E5.tmp
    Filesize

    1KB

    MD5

    4b8f05c5e7240953865516deed507c89

    SHA1

    d27eb1926385c870b8db7d6f188cecafe95139b2

    SHA256

    ecfb2807def1c72780dcc446b07a1fd9e344728f62e016c807741f511aad9b6d

    SHA512

    cf54ab5fdbcb069d968acd1d982073ca4c07a4a4e2a7816aa5f5272d0c718e98d016b7d2e53bc82c33a96f691e11b7926cfb8f81254cf8a8f6e93384b8e7dbb2

    Download Submit
  • memory/3220-131-0x0000000000000000-mapping.dmp
    Download
  • memory/3692-130-0x00000000748D0000-0x0000000074E81000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4848-133-0x0000000000000000-mapping.dmp
    Download
  • memory/4848-134-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

    Download
  • memory/4848-135-0x00000000748D0000-0x0000000074E81000-memory.dmp
    Filesize

    5.7MB

    Download