Analysis

  • max time kernel
    75s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    10-10-2022 13:45

General

  • Target

    4b98fb32c247937a969d5595bc4f7cab68b16d156f09d800f4f193b5e68f8f87.exe

  • Size

    863KB

  • MD5

    1844318a758b4ef0d0f0191239fcfa80

  • SHA1

    a4873d756272d2f154419deec672b7d78cf6fed2

  • SHA256

    4b98fb32c247937a969d5595bc4f7cab68b16d156f09d800f4f193b5e68f8f87

  • SHA512

    96c7bc413a850c445943cb68bb7c48c4ae9fbbc1eb2621203bcc778b6fbed60a7ffa35d21b32a24a9f9765723efe7f55fba830ca11a784888092d58c8c3bbbd0

  • SSDEEP

    12288:8TSltjxv02iNTzDgneU/DyS7faY8cr7WqlnQeP8erZi1qADqjJ5n:cSF01pzDozDzf0Mq8wMjr

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

brightnano1.ddns.net:1989

171.22.30.97:1989

Mutex

fba1bbc6-2cc8-4c94-b6c0-dda5a12fd7fe

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    171.22.30.97

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-06-10T14:34:05.030247036Z

  • 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

    1989

  • 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

    fba1bbc6-2cc8-4c94-b6c0-dda5a12fd7fe

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    brightnano1.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.

  • 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 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b98fb32c247937a969d5595bc4f7cab68b16d156f09d800f4f193b5e68f8f87.exe
    "C:\Users\Admin\AppData\Local\Temp\4b98fb32c247937a969d5595bc4f7cab68b16d156f09d800f4f193b5e68f8f87.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1764
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oddCRqfBSg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4B34.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1316
    • C:\Users\Admin\AppData\Local\Temp\4b98fb32c247937a969d5595bc4f7cab68b16d156f09d800f4f193b5e68f8f87.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:768
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SCSI Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4FF5.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1900
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SCSI Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp50B1.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:1616
  • C:\Windows\system32\wbem\WmiApSrv.exe
    C:\Windows\system32\wbem\WmiApSrv.exe
    1⤵
      PID:1996

    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

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp4B34.tmp
      Filesize

      1KB

      MD5

      66540319a8d0adfe2c488774689eb835

      SHA1

      81c84f5f1f96007e1573338a495d3a12be073719

      SHA256

      eedde8965c2cd2a42328dc5693952f932b2d69906d079139b25e428bd40a533c

      SHA512

      4fc4a7634c76c4c6825c35d9ae77a5a5b4dc8632dd64835cc615fdb2ff41e2b2a00a221125ff9760dcc577a07c03627263ddd0bda18746c22407f1afcbc19a0b

    • C:\Users\Admin\AppData\Local\Temp\tmp4FF5.tmp
      Filesize

      1KB

      MD5

      eea5dc6ba557459fac79964bb3de0b35

      SHA1

      ab3933bccc90c05cae1b2b0e6a00cd7e49940ce6

      SHA256

      017f2c90bb1d999a3b45929bb80d48cd1098a28c6f3659acc036c83b66f7a89c

      SHA512

      988e52e7cb9560673130d91ae86395a6cc765efd6f2405b318d4dd9e526cd680b1291aedd3fdcd0e42130e05e9602d2828171e3bccd7a1e3bc270b4fcbe2ff2b

    • C:\Users\Admin\AppData\Local\Temp\tmp50B1.tmp
      Filesize

      1KB

      MD5

      4e71faa3a77029484cfaba423d96618f

      SHA1

      9c837d050bb43d69dc608af809c292e13bca4718

      SHA256

      c470f45efd2e7c4c5b88534a18965a78dce0f8e154d3e45a9d5569ad0e334bdb

      SHA512

      6d014de41352f2b0b494d94cd58188791e81d4e53578d0722110b6827793b735e19c614877f25c61b26233dea1b5f1998ba1240bdc8fa04c87b7e64a4ca15fe0

    • memory/768-62-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-92-0x0000000002300000-0x0000000002314000-memory.dmp
      Filesize

      80KB

    • memory/768-91-0x0000000000870000-0x000000000089E000-memory.dmp
      Filesize

      184KB

    • memory/768-90-0x0000000000750000-0x000000000075E000-memory.dmp
      Filesize

      56KB

    • memory/768-61-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-89-0x0000000000740000-0x0000000000754000-memory.dmp
      Filesize

      80KB

    • memory/768-64-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-65-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-67-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-68-0x000000000041E792-mapping.dmp
    • memory/768-72-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-70-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/768-88-0x0000000000730000-0x0000000000740000-memory.dmp
      Filesize

      64KB

    • memory/768-87-0x0000000000720000-0x0000000000734000-memory.dmp
      Filesize

      80KB

    • memory/768-86-0x00000000006D0000-0x00000000006DC000-memory.dmp
      Filesize

      48KB

    • memory/768-78-0x0000000000390000-0x000000000039A000-memory.dmp
      Filesize

      40KB

    • memory/768-85-0x00000000006C0000-0x00000000006CE000-memory.dmp
      Filesize

      56KB

    • memory/768-79-0x00000000003A0000-0x00000000003BE000-memory.dmp
      Filesize

      120KB

    • memory/768-80-0x00000000003D0000-0x00000000003DA000-memory.dmp
      Filesize

      40KB

    • memory/768-81-0x0000000000610000-0x0000000000622000-memory.dmp
      Filesize

      72KB

    • memory/768-82-0x0000000000620000-0x000000000063A000-memory.dmp
      Filesize

      104KB

    • memory/768-83-0x0000000000650000-0x000000000065E000-memory.dmp
      Filesize

      56KB

    • memory/768-84-0x00000000006B0000-0x00000000006C2000-memory.dmp
      Filesize

      72KB

    • memory/1316-59-0x0000000000000000-mapping.dmp
    • memory/1616-76-0x0000000000000000-mapping.dmp
    • memory/1764-58-0x0000000002140000-0x000000000217A000-memory.dmp
      Filesize

      232KB

    • memory/1764-56-0x0000000000480000-0x00000000004A0000-memory.dmp
      Filesize

      128KB

    • memory/1764-54-0x00000000009E0000-0x0000000000ABE000-memory.dmp
      Filesize

      888KB

    • memory/1764-57-0x0000000005800000-0x000000000588A000-memory.dmp
      Filesize

      552KB

    • memory/1764-55-0x0000000075BA1000-0x0000000075BA3000-memory.dmp
      Filesize

      8KB

    • memory/1900-74-0x0000000000000000-mapping.dmp