Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2024, 11:33

General

  • Target

    quotation.scr.exe

  • Size

    295KB

  • MD5

    38699281db788537bea1ce577eb81ea9

  • SHA1

    39e11046b7c615a047875ca3a0eafd20d583d693

  • SHA256

    9598d353175682d82d7bbe9eca3d48c97552db2718e77007601f80541b7c8afb

  • SHA512

    fd33f696fc92ed4d496088715dbc82ca7c67e3049b1855ca56c3576381677274cdd1d437ea98cb3774c5bef0106a2dbc984c97b8c680d243cee104c042357c3f

  • SSDEEP

    6144:mfzUOcy4y9KPUapZTWJSij3SoiQxTwMdU8gP2iDeE/T1u/cO:ozUO99K1Wdj3STsTwWUtyE8/c

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

harold.jetos.com:6051

Mutex

c21ee39c-274d-42dc-9878-9c010930f524

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    harold.jetos.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2023-11-05T15:38:42.943803836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    6051

  • default_group

    sales224

  • 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

    c21ee39c-274d-42dc-9878-9c010930f524

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    harold.jetos.com

  • 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.

  • Executes dropped EXE 2 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 3 IoCs
  • 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 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\quotation.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\quotation.scr.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:2604
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\quotation.scr.exe" "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe"
      2⤵
        PID:2720
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2460
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
          3⤵
          • Creates scheduled task(s)
          PID:2476
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
        2⤵
          PID:2608
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {9707C050-56CD-4F11-9E6F-89195EC41DCE} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:1096
        • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
          C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
          2⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1196
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
            3⤵
              PID:2988
            • C:\Windows\SysWOW64\cmd.exe
              "cmd" /c copy "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe" "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe"
              3⤵
                PID:2236
              • C:\Windows\SysWOW64\cmd.exe
                "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:1380
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
                  4⤵
                  • Creates scheduled task(s)
                  PID:780
              • C:\Windows\SysWOW64\cmd.exe
                "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
                3⤵
                  PID:632
              • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
                C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
                2⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:956
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
                  3⤵
                    PID:616
                  • C:\Windows\SysWOW64\cmd.exe
                    "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
                    3⤵
                      PID:1400
                    • C:\Windows\SysWOW64\cmd.exe
                      "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
                      3⤵
                        PID:1868
                        • C:\Windows\SysWOW64\schtasks.exe
                          schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
                          4⤵
                          • Creates scheduled task(s)
                          PID:2972
                      • C:\Windows\SysWOW64\cmd.exe
                        "cmd" /c copy "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe" "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe"
                        3⤵
                          PID:1832

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe

                      Filesize

                      295KB

                      MD5

                      38699281db788537bea1ce577eb81ea9

                      SHA1

                      39e11046b7c615a047875ca3a0eafd20d583d693

                      SHA256

                      9598d353175682d82d7bbe9eca3d48c97552db2718e77007601f80541b7c8afb

                      SHA512

                      fd33f696fc92ed4d496088715dbc82ca7c67e3049b1855ca56c3576381677274cdd1d437ea98cb3774c5bef0106a2dbc984c97b8c680d243cee104c042357c3f

                    • memory/616-80-0x0000000000A50000-0x0000000000A90000-memory.dmp

                      Filesize

                      256KB

                    • memory/616-79-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/956-63-0x0000000000ED0000-0x0000000000F20000-memory.dmp

                      Filesize

                      320KB

                    • memory/956-81-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/956-66-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/956-65-0x0000000000D70000-0x0000000000DB0000-memory.dmp

                      Filesize

                      256KB

                    • memory/956-64-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/1196-61-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/1196-43-0x0000000000950000-0x00000000009A0000-memory.dmp

                      Filesize

                      320KB

                    • memory/1196-45-0x0000000001E80000-0x0000000001EC0000-memory.dmp

                      Filesize

                      256KB

                    • memory/1196-44-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/1196-46-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2416-1-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2416-15-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2416-2-0x0000000000E10000-0x0000000000E50000-memory.dmp

                      Filesize

                      256KB

                    • memory/2416-0-0x00000000011D0000-0x0000000001220000-memory.dmp

                      Filesize

                      320KB

                    • memory/2416-4-0x0000000000E10000-0x0000000000E50000-memory.dmp

                      Filesize

                      256KB

                    • memory/2416-3-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2604-12-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-40-0x0000000004AA0000-0x0000000004AE0000-memory.dmp

                      Filesize

                      256KB

                    • memory/2604-32-0x0000000000C60000-0x0000000000C74000-memory.dmp

                      Filesize

                      80KB

                    • memory/2604-31-0x0000000000C10000-0x0000000000C1E000-memory.dmp

                      Filesize

                      56KB

                    • memory/2604-30-0x0000000000BF0000-0x0000000000BFC000-memory.dmp

                      Filesize

                      48KB

                    • memory/2604-29-0x0000000000BE0000-0x0000000000BF2000-memory.dmp

                      Filesize

                      72KB

                    • memory/2604-28-0x0000000000BC0000-0x0000000000BCE000-memory.dmp

                      Filesize

                      56KB

                    • memory/2604-33-0x0000000000CB0000-0x0000000000CC0000-memory.dmp

                      Filesize

                      64KB

                    • memory/2604-34-0x0000000000CC0000-0x0000000000CD4000-memory.dmp

                      Filesize

                      80KB

                    • memory/2604-36-0x0000000000E30000-0x0000000000E5E000-memory.dmp

                      Filesize

                      184KB

                    • memory/2604-35-0x0000000000CD0000-0x0000000000CDE000-memory.dmp

                      Filesize

                      56KB

                    • memory/2604-37-0x0000000000E60000-0x0000000000E74000-memory.dmp

                      Filesize

                      80KB

                    • memory/2604-39-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2604-26-0x0000000000B00000-0x0000000000B12000-memory.dmp

                      Filesize

                      72KB

                    • memory/2604-27-0x0000000000BA0000-0x0000000000BBA000-memory.dmp

                      Filesize

                      104KB

                    • memory/2604-23-0x00000000007F0000-0x00000000007FA000-memory.dmp

                      Filesize

                      40KB

                    • memory/2604-22-0x0000000000AD0000-0x0000000000AEE000-memory.dmp

                      Filesize

                      120KB

                    • memory/2604-21-0x00000000007E0000-0x00000000007EA000-memory.dmp

                      Filesize

                      40KB

                    • memory/2604-17-0x0000000004AA0000-0x0000000004AE0000-memory.dmp

                      Filesize

                      256KB

                    • memory/2604-14-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-16-0x0000000074690000-0x0000000074D7E000-memory.dmp

                      Filesize

                      6.9MB

                    • memory/2604-10-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-9-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

                      Filesize

                      4KB

                    • memory/2604-8-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-7-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-6-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB

                    • memory/2604-5-0x0000000000400000-0x0000000000438000-memory.dmp

                      Filesize

                      224KB