Overview

overview

10

Static

static

PostNL kla...oc.exe

windows7_x64

10

PostNL kla...oc.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    147s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 02:29

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General

  • Target

    PostNL klant verzendinformatie document doc.exe

  • Size

    500KB

  • MD5

    96197942f6e4fb122810a1188781d9a1

  • SHA1

    a19f727211c5120a482af60dfca7042f181f5e3a

  • SHA256

    04d57be00e1edddcfd5cd6088b4eec44591c6f0a5f9e6a13b9f90e66a24ccc25

  • SHA512

    4c4ab690187abfa8b68641dbe02038d91ec56a9898a69a65709cea7d86cc984df9ef1f7d6658d7f3b0fecd3931bccdf14d828ee09b50b54cb32105a32009f45d

Score
10/10
nanocoreevasionkeyloggerspywarestealersuricatatrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

postnl.duckdns.org:1969

127.0.0.1:1969
Mutex

03803fb4-9846-4772-b30e-fac43bb55ddb

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-04-27T07:08:14.039616336Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    1969

  • default_group

    POSTNL

  • 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

    03803fb4-9846-4772-b30e-fac43bb55ddb

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    postnl.duckdns.org

  • 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.

    keyloggertrojanstealerspywarenanocore
  • suricata: ET MALWARE Possible NanoCore C2 60B

    suricata: ET MALWARE Possible NanoCore C2 60B

    suricata
  • 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.

  • 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
  • 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\PostNL klant verzendinformatie document doc.exe
    "C:\Users\Admin\AppData\Local\Temp\PostNL klant verzendinformatie document doc.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:4516
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vlNpaFxnRflL" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1D86.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4820
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4876

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

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\tmp1D86.tmp
    Filesize

    1KB

    MD5

    52c840affa6ba86bfe06f76fb607e4ae

    SHA1

    1d4d6ff1069c6fa366c72dd89bae24adbbefd885

    SHA256

    e0ef51b5774116c6d06761cb71c093e151af513b20168502fff77f64a76c1945

    SHA512

    be75e8bcd88f8d5f9d6b8ca6af2d2b5ae9a5c6dfec53c0d0f08dcf16f564dfb5b0b4698ba6de8905f568533efd58469652ce259d9c3837c0f9443ded6cc7ada5

    Download Submit
  • memory/4516-130-0x0000000074F30000-0x00000000754E1000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4820-131-0x0000000000000000-mapping.dmp
    Download
  • memory/4876-133-0x0000000000000000-mapping.dmp
    Download
  • memory/4876-134-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

    Download
  • memory/4876-135-0x0000000074F30000-0x00000000754E1000-memory.dmp
    Filesize

    5.7MB

    Download