Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-09-2022 14:23

General

  • Target

    PO_449.exe

  • Size

    16KB

  • MD5

    3f5988b4bc9dc56e20d2190acb29096f

  • SHA1

    6846513db04beb11b364bc21dbf0cef29aa835bf

  • SHA256

    f24cccaad9d51652c9b26d8e265ef12955c24af3d9032140324a92a6675469e6

  • SHA512

    1ac0e6b28eeaf27aaaf915b8cf9ae2d24bcffad9a98b6367783492297f0454e6331c68079bf6963abbdacd6e973fa80205286684e2df1fd10c8cbcae389be4c9

  • SSDEEP

    384:BxvUpRBGW12cXzzVib8pLoztCepGWzJdRHQxCiy:BxvUpRnNDpt6BGuJsEB

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

freemason.ddns.net:40405

79.134.225.7:40405

Mutex

770684dd-05a1-46c0-96b6-1add91aa488c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    79.134.225.7

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-06-27T23:04:21.727970936Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2Ij8+DQo8VGFzayB2ZXJzaW9uPSIxLjIiIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5taWNyb3NvZnQuY29tL3dpbmRvd3MvMjAwNC8wMi9taXQvdGFzayI+DQogIDxSZWdpc3RyYXRpb25JbmZvIC8+DQogIDxUcmlnZ2VycyAvPg0KICA8UHJpbmNpcGFscz4NCiAgICA8UHJpbmNpcGFsIGlkPSJBdXRob3IiPg0KICAgICAgPExvZ29uVHlwZT5JbnRlcmFjdGl2ZVRva2VuPC9Mb2dvblR5cGU+DQogICAgICA8UnVuTGV2ZWw+SGlnaGVzdEF2YWlsYWJsZTwvUnVuTGV2ZWw+DQogICAgPC9QcmluY2lwYWw+DQogIDwvUHJpbmNpcGFscz4NCiAgPFNldHRpbmdzPg0KICAgIDxNdWx0aXBsZUluc3RhbmNlc1BvbGljeT5QYXJhbGxlbDwvTXVsdGlwbGVJbnN0YW5jZXNQb2xpY3k+DQogICAgPERpc2FsbG93U3RhcnRJZk9uQmF0dGVyaWVzPmZhbHNlPC9EaXNhbGxvd1N0YXJ0SWZPbkJhdHRlcmllcz4NCiAgICA8U3RvcElmR29pbmdPbkJhdHRlcmllcz5mYWxzZTwvU3RvcElmR29pbmdPbkJhdHRlcmllcz4NCiAgICA8QWxsb3dIYXJkVGVybWluYXRlPnRydWU8L0FsbG93SGFyZFRlcm1pbmF0ZT4NCiAgICA8U3RhcnRXaGVuQXZhaWxhYmxlPmZhbHNlPC9TdGFydFdoZW5BdmFpbGFibGU+DQogICAgPFJ1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+ZmFsc2U8L1J1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+DQogICAgPElkbGVTZXR0aW5ncz4NCiAgICAgIDxTdG9wT25JZGxlRW5kPmZhbHNlPC9TdG9wT25JZGxlRW5kPg0KICAgICAgPFJlc3RhcnRPbklkbGU+ZmFsc2U8L1Jlc3RhcnRPbklkbGU+DQogICAgPC9JZGxlU2V0dGluZ3M+DQogICAgPEFsbG93U3RhcnRPbkRlbWFuZD50cnVlPC9BbGxvd1N0YXJ0T25EZW1hbmQ+DQogICAgPEVuYWJsZWQ+dHJ1ZTwvRW5hYmxlZD4NCiAgICA8SGlkZGVuPmZhbHNlPC9IaWRkZW4+DQogICAgPFJ1bk9ubHlJZklkbGU+ZmFsc2U8L1J1bk9ubHlJZklkbGU+DQogICAgPFdha2VUb1J1bj5mYWxzZTwvV2FrZVRvUnVuPg0KICAgIDxFeGVjdXRpb25UaW1lTGltaXQ+UFQwUzwvRXhlY3V0aW9uVGltZUxpbWl0Pg0KICAgIDxQcmlvcml0eT40PC9Qcmlvcml0eT4NCiAgPC9TZXR0aW5ncz4NCiAgPEFjdGlvbnMgQ29udGV4dD0iQXV0aG9yIj4NCiAgICA8RXhlYz4NCiAgICAgIDxDb21tYW5kPiIjRVhFQ1VUQUJMRVBBVEgiPC9Db21tYW5kPg0KICAgICAgPEFyZ3VtZW50cz4kKEFyZzApPC9Bcmd1bWVudHM+DQogICAgPC9FeGVjPg0KICA8L0FjdGlvbnM+DQo8L1Rhc2s+

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    40405

  • 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

    770684dd-05a1-46c0-96b6-1add91aa488c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    freemason.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.

  • 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
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO_449.exe
    "C:\Users\Admin\AppData\Local\Temp\PO_449.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3060
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2640
    • C:\Users\Admin\AppData\Local\Temp\PO_449.exe
      C:\Users\Admin\AppData\Local\Temp\PO_449.exe
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3780
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DDP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFC95.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1536
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DDP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFD22.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:4304

Network

MITRE ATT&CK Matrix ATT&CK v6

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

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\PO_449.exe.log
    Filesize

    1KB

    MD5

    ef95a426c7cadbe261c528f59813e6ab

    SHA1

    5edc710e2a90db2d262dd4d10d6f09d20e823007

    SHA256

    b481e9bf0515a6beb15cb252f60847275d978eba72691d5d8fa1c6a79b5cda9a

    SHA512

    53039306141608f7a606a1500f61193be16e97e53724b0d76721106c8dc7a5a8406c96019b9c32d0800d011bd2e55f46d34d2d74ed9b2661c7e006e329c45180

  • C:\Users\Admin\AppData\Local\Temp\tmpFC95.tmp
    Filesize

    1KB

    MD5

    f8504b1dde11a9e781c4941129ca1b0b

    SHA1

    00e6b784a57d84e04a00bff6f5671658aea5c358

    SHA256

    86807a477301cf6e27ed6e3c467e4c60aa5a6a496afad13d5d5d143549c04b94

    SHA512

    e59dd1cdcf184cc80355c2c86f27edbecc5959395f77f122715a08561438b82c8528a0089c970ec7cd5af12141bf589229e01b5399646c614a6d1caacb9d5703

  • C:\Users\Admin\AppData\Local\Temp\tmpFD22.tmp
    Filesize

    1KB

    MD5

    2271642ca970891700e3f48439739ed8

    SHA1

    cd472df2349f7db9e1e460d0ee28acd97b8a8793

    SHA256

    7aba66abbcb0b13455609174db23aed495a9adbef0e0acd28baa9c92445eda68

    SHA512

    4669a4ef8ec28cdb852ffc1401576b1bf9a9d837797d7d92bc88c18b3097404f36854e50167b309706fef400cabc43c876569ce2797ba85eb169a2783b8fe807

  • memory/1536-149-0x0000000000000000-mapping.dmp
  • memory/2640-134-0x0000000000000000-mapping.dmp
  • memory/2640-135-0x0000000002990000-0x00000000029C6000-memory.dmp
    Filesize

    216KB

  • memory/2640-136-0x0000000005290000-0x00000000058B8000-memory.dmp
    Filesize

    6.2MB

  • memory/2640-137-0x00000000058C0000-0x0000000005926000-memory.dmp
    Filesize

    408KB

  • memory/2640-138-0x0000000005930000-0x0000000005996000-memory.dmp
    Filesize

    408KB

  • memory/2640-139-0x0000000005F80000-0x0000000005F9E000-memory.dmp
    Filesize

    120KB

  • memory/2640-140-0x00000000077C0000-0x0000000007E3A000-memory.dmp
    Filesize

    6.5MB

  • memory/2640-141-0x0000000007020000-0x000000000703A000-memory.dmp
    Filesize

    104KB

  • memory/3060-142-0x0000000008EC0000-0x0000000008F52000-memory.dmp
    Filesize

    584KB

  • memory/3060-143-0x0000000009A50000-0x0000000009FF4000-memory.dmp
    Filesize

    5.6MB

  • memory/3060-132-0x0000000000140000-0x000000000014A000-memory.dmp
    Filesize

    40KB

  • memory/3060-133-0x0000000008940000-0x0000000008962000-memory.dmp
    Filesize

    136KB

  • memory/3780-145-0x0000000000400000-0x0000000000456000-memory.dmp
    Filesize

    344KB

  • memory/3780-144-0x0000000000000000-mapping.dmp
  • memory/3780-147-0x0000000005950000-0x00000000059EC000-memory.dmp
    Filesize

    624KB

  • memory/3780-148-0x00000000057C0000-0x00000000057CA000-memory.dmp
    Filesize

    40KB

  • memory/4304-151-0x0000000000000000-mapping.dmp