Analysis

  • max time kernel
    187s
  • max time network
    193s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:36

General

  • Target

    Teklif açıklaması bilgileri Z0T5nOBüyükşehir Mh.Cumhuriyet Cdoc.exe

  • Size

    489KB

  • MD5

    10862bd9538040e6ce9d8c093d9e5abc

  • SHA1

    96be2d74c24287941e0c683e920cdff848efa2c1

  • SHA256

    430a7e324ab686d71a38548850bb90d018b0d7aec9cdbccb7289beb4d09f5a9f

  • SHA512

    bbb44029fb769fb266b3e42b7e0e0fed6365c98ec61b0049fd1533f93eff691f3bedcf9ce48f816d7f39bfdc31146d2ca4916f6c5f3be2c3da63ed18504a0d99

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.

  • suricata: ET MALWARE Possible NanoCore C2 60B

    suricata: ET MALWARE Possible NanoCore C2 60B

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • 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.

  • 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\Teklif açıklaması bilgileri Z0T5nOBüyükşehir Mh.Cumhuriyet Cdoc.exe
    "C:\Users\Admin\AppData\Local\Temp\Teklif açıklaması bilgileri Z0T5nOBüyükşehir Mh.Cumhuriyet Cdoc.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:4256
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yzgSDq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBA52.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1412
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:5072

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpBA52.tmp
    Filesize

    1KB

    MD5

    6fd82e9816c16db80ac5fb98ca432860

    SHA1

    b45e834e4b5706b5702a6bdf3e8b8f26b6356120

    SHA256

    c9b4ffc25320370dd6a4c4628080550a5c5fe1cd01cff12f63bb9289edb94b4d

    SHA512

    2754ba3982b6075222aaf5cc0af09985e569b2abc150333c46b4c6d2bcf3fe12b9bd414ef108a7cd788db98e469b914b2e4f6719e8e7d7a8efcc3802eb461e47

  • memory/1412-136-0x0000000000000000-mapping.dmp
  • memory/4256-130-0x0000000000400000-0x0000000000480000-memory.dmp
    Filesize

    512KB

  • memory/4256-131-0x00000000054F0000-0x0000000005A94000-memory.dmp
    Filesize

    5.6MB

  • memory/4256-132-0x0000000004E20000-0x0000000004EB2000-memory.dmp
    Filesize

    584KB

  • memory/4256-133-0x0000000005AA0000-0x0000000005C26000-memory.dmp
    Filesize

    1.5MB

  • memory/4256-134-0x0000000005360000-0x00000000053FC000-memory.dmp
    Filesize

    624KB

  • memory/4256-135-0x0000000000A30000-0x0000000000A96000-memory.dmp
    Filesize

    408KB

  • memory/5072-138-0x0000000000000000-mapping.dmp
  • memory/5072-139-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/5072-140-0x0000000004E40000-0x0000000004E4A000-memory.dmp
    Filesize

    40KB