Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/11/2022, 11:37

General

  • Target

    REVISED PO -TSTC22-1011_Pdf.exe

  • Size

    800KB

  • MD5

    bd101f1d805750bd4b9fdeeb546efcc0

  • SHA1

    fa881fdee6fbff34055e00737a3766fcd1493a1b

  • SHA256

    e23943f7a0d3e8bfcb2ea6debdd990281fd94e32629db00f12b8208b668bed52

  • SHA512

    cdf9db01870ead7062166a7b2075620d4aa747b0716078498e917bbb48f6729a32902f49a9d1071d67520752e7e9bffe2d2a7effa304a9acbcea5fa841e40362

  • SSDEEP

    12288:SKfxkcehk1CEunCU8gJwWcGfqefprSBDgM/A:NLV1CEuCURT/mDW

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

henzy.ddns.net:2828

Mutex

88894717-40ab-4845-8948-707139163d90

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-05-20T06:47:18.240303436Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    2828

  • default_group

    User22

  • 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

    88894717-40ab-4845-8948-707139163d90

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    henzy.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 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3828
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uuPTAGHRzGi.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3916
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uuPTAGHRzGi" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8B29.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3720
    • C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe"
      2⤵
        PID:1408
      • C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.exe
        "C:\Users\Admin\AppData\Local\Temp\REVISED PO -TSTC22-1011_Pdf.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:1420
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8F20.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:2548
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8F70.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:4960

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\tmp8B29.tmp

            Filesize

            1KB

            MD5

            5341da50d695c0d6bb8c34e0808280b9

            SHA1

            db363abbcc306bd731d2402a8e8048457494c8b4

            SHA256

            6dcf8069c0894cc17214b286a11d1f59c9752331f730ca0b0a631b50654e996d

            SHA512

            9c4fa299bdaaa0975a6eac0472d21e037ae8b50cdeb5f32ed9581f4a290eb2b106266db24a417f1d88335ca9ed1e18863c75f405a8fdc19c64fda47c5b7f67c4

          • C:\Users\Admin\AppData\Local\Temp\tmp8F20.tmp

            Filesize

            1KB

            MD5

            009102eae052bce5463af965c53565c9

            SHA1

            f6291373c2ebf187e3724dc7d4f9c7baf57173bb

            SHA256

            db50cd26a722c0e7c0bf9810f8a24fb79db2c28dee5e5473b32cdafb4c440421

            SHA512

            6103132503be7601ee96a1f75a83923c436881983d2f451cab298a3376f88b5614e5567c088364c5c50ad03f79d121e174b86c285b2a846d73bf2bd39399a2cd

          • C:\Users\Admin\AppData\Local\Temp\tmp8F70.tmp

            Filesize

            1KB

            MD5

            2f26d92c1eeead3896820e56ec46f6f1

            SHA1

            d95533b61eed7d89e4ada56bc566d60e42ac1f61

            SHA256

            99a158463ce40c750bad6991ae1fceece305a0dbf8e209dd7147b5d539756bfa

            SHA512

            6c1ed12d5e1afcd9e7f327e0153786fd8594f75a995f341c408ef014e69917452a9fe99c511f0249aceb57b3045b707f1fd3f404e4086cfbf0aadcb3318db892

          • memory/1420-144-0x0000000000400000-0x0000000000438000-memory.dmp

            Filesize

            224KB

          • memory/3828-132-0x0000000000680000-0x000000000074E000-memory.dmp

            Filesize

            824KB

          • memory/3828-136-0x00000000090A0000-0x000000000913C000-memory.dmp

            Filesize

            624KB

          • memory/3828-135-0x00000000051A0000-0x00000000051AA000-memory.dmp

            Filesize

            40KB

          • memory/3828-134-0x0000000005100000-0x0000000005192000-memory.dmp

            Filesize

            584KB

          • memory/3828-133-0x00000000056B0000-0x0000000005C54000-memory.dmp

            Filesize

            5.6MB

          • memory/3916-146-0x0000000005D20000-0x0000000005D86000-memory.dmp

            Filesize

            408KB

          • memory/3916-158-0x00000000078B0000-0x00000000078BA000-memory.dmp

            Filesize

            40KB

          • memory/3916-147-0x0000000005F40000-0x0000000005FA6000-memory.dmp

            Filesize

            408KB

          • memory/3916-143-0x0000000005640000-0x0000000005C68000-memory.dmp

            Filesize

            6.2MB

          • memory/3916-139-0x0000000004F70000-0x0000000004FA6000-memory.dmp

            Filesize

            216KB

          • memory/3916-162-0x0000000007B60000-0x0000000007B68000-memory.dmp

            Filesize

            32KB

          • memory/3916-151-0x0000000006540000-0x000000000655E000-memory.dmp

            Filesize

            120KB

          • memory/3916-153-0x00000000074E0000-0x0000000007512000-memory.dmp

            Filesize

            200KB

          • memory/3916-154-0x0000000070C70000-0x0000000070CBC000-memory.dmp

            Filesize

            304KB

          • memory/3916-155-0x0000000006B00000-0x0000000006B1E000-memory.dmp

            Filesize

            120KB

          • memory/3916-156-0x0000000007E90000-0x000000000850A000-memory.dmp

            Filesize

            6.5MB

          • memory/3916-157-0x0000000007840000-0x000000000785A000-memory.dmp

            Filesize

            104KB

          • memory/3916-145-0x00000000055A0000-0x00000000055C2000-memory.dmp

            Filesize

            136KB

          • memory/3916-159-0x0000000007AC0000-0x0000000007B56000-memory.dmp

            Filesize

            600KB

          • memory/3916-160-0x0000000007A70000-0x0000000007A7E000-memory.dmp

            Filesize

            56KB

          • memory/3916-161-0x0000000007B80000-0x0000000007B9A000-memory.dmp

            Filesize

            104KB