Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-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 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 60 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:3268
    • 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:820
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
      2⤵
        PID:1512
      • 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:1516
        • 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:1124
          • 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:3444
      • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
        C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2740
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          2⤵
            PID:4452
          • C:\Windows\SysWOW64\cmd.exe
            "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
            2⤵
              PID:4252
            • 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:1852
              • 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:3820
            • C:\Windows\SysWOW64\cmd.exe
              "cmd" /c copy "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe" "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe"
              2⤵
                PID:1996
            • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
              C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1740
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
                2⤵
                  PID:4912
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
                  2⤵
                    PID:4904
                  • 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:4804
                    • 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:1884
                  • C:\Windows\SysWOW64\cmd.exe
                    "cmd" /c copy "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe" "C:\Users\Admin\AppData\Roaming\explorer\explorer.exe"
                    2⤵
                      PID:2320

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

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

                    Filesize

                    612B

                    MD5

                    81ab0e59097e03cb04c32378024d6628

                    SHA1

                    cc2a7a335f905e787906b6a0820acfbd4c5d0ed2

                    SHA256

                    704dd8b8fb6dfccf43fd0712e36950102151fe7232d6602c53a42af967969533

                    SHA512

                    3dd1374962c4d913ad6ec4207889abcca3e28946fa8937626bd2d13025a538e676bfc2efe76d27031d3f741bb3934104c0cf4e10da62758839add1fe543dfacb

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

                    Filesize

                    1KB

                    MD5

                    84e77a587d94307c0ac1357eb4d3d46f

                    SHA1

                    83cc900f9401f43d181207d64c5adba7a85edc1e

                    SHA256

                    e16024b092a026a9dc00df69d4b9bbcab7b2dc178dc5291fc308a1abc9304a99

                    SHA512

                    aefb5c62200b3ed97718d20a89990954d4d8acdc0a6a73c5a420f1bba619cb79e70c2cd0a579b9f52dc6b09e1de2cea6cd6cac4376cfee92d94e2c01d310f691

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

                    Filesize

                    295KB

                    MD5

                    38699281db788537bea1ce577eb81ea9

                    SHA1

                    39e11046b7c615a047875ca3a0eafd20d583d693

                    SHA256

                    9598d353175682d82d7bbe9eca3d48c97552db2718e77007601f80541b7c8afb

                    SHA512

                    fd33f696fc92ed4d496088715dbc82ca7c67e3049b1855ca56c3576381677274cdd1d437ea98cb3774c5bef0106a2dbc984c97b8c680d243cee104c042357c3f

                  • memory/820-32-0x00000000070A0000-0x00000000070B4000-memory.dmp

                    Filesize

                    80KB

                  • memory/820-20-0x0000000006850000-0x000000000685A000-memory.dmp

                    Filesize

                    40KB

                  • memory/820-9-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/820-11-0x00000000058F0000-0x0000000005982000-memory.dmp

                    Filesize

                    584KB

                  • memory/820-41-0x0000000005800000-0x0000000005810000-memory.dmp

                    Filesize

                    64KB

                  • memory/820-12-0x0000000005990000-0x0000000005A2C000-memory.dmp

                    Filesize

                    624KB

                  • memory/820-38-0x0000000005800000-0x0000000005810000-memory.dmp

                    Filesize

                    64KB

                  • memory/820-16-0x0000000005870000-0x000000000587A000-memory.dmp

                    Filesize

                    40KB

                  • memory/820-18-0x00000000058D0000-0x00000000058DA000-memory.dmp

                    Filesize

                    40KB

                  • memory/820-37-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/820-26-0x0000000007030000-0x000000000703E000-memory.dmp

                    Filesize

                    56KB

                  • memory/820-21-0x0000000005800000-0x0000000005810000-memory.dmp

                    Filesize

                    64KB

                  • memory/820-25-0x0000000007000000-0x000000000701A000-memory.dmp

                    Filesize

                    104KB

                  • memory/820-24-0x0000000006FF0000-0x0000000007002000-memory.dmp

                    Filesize

                    72KB

                  • memory/820-29-0x0000000007060000-0x000000000706E000-memory.dmp

                    Filesize

                    56KB

                  • memory/820-28-0x0000000007050000-0x000000000705C000-memory.dmp

                    Filesize

                    48KB

                  • memory/820-27-0x0000000007040000-0x0000000007052000-memory.dmp

                    Filesize

                    72KB

                  • memory/820-31-0x0000000007080000-0x0000000007090000-memory.dmp

                    Filesize

                    64KB

                  • memory/820-34-0x00000000070D0000-0x00000000070FE000-memory.dmp

                    Filesize

                    184KB

                  • memory/820-35-0x0000000007100000-0x0000000007114000-memory.dmp

                    Filesize

                    80KB

                  • memory/820-33-0x00000000070C0000-0x00000000070CE000-memory.dmp

                    Filesize

                    56KB

                  • memory/820-7-0x0000000000400000-0x0000000000438000-memory.dmp

                    Filesize

                    224KB

                  • memory/820-15-0x0000000005800000-0x0000000005810000-memory.dmp

                    Filesize

                    64KB

                  • memory/820-30-0x0000000007070000-0x0000000007084000-memory.dmp

                    Filesize

                    80KB

                  • memory/820-19-0x0000000006600000-0x000000000661E000-memory.dmp

                    Filesize

                    120KB

                  • memory/1740-55-0x0000000004DB0000-0x0000000004DC0000-memory.dmp

                    Filesize

                    64KB

                  • memory/1740-62-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1740-57-0x0000000004DB0000-0x0000000004DC0000-memory.dmp

                    Filesize

                    64KB

                  • memory/1740-56-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1740-54-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/2740-49-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/2740-43-0x00000000054E0000-0x00000000054F0000-memory.dmp

                    Filesize

                    64KB

                  • memory/2740-42-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/2740-44-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3268-2-0x0000000004C20000-0x0000000004C30000-memory.dmp

                    Filesize

                    64KB

                  • memory/3268-10-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3268-3-0x0000000005200000-0x00000000057A4000-memory.dmp

                    Filesize

                    5.6MB

                  • memory/3268-4-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3268-1-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3268-5-0x0000000004C20000-0x0000000004C30000-memory.dmp

                    Filesize

                    64KB

                  • memory/3268-0-0x00000000002F0000-0x0000000000340000-memory.dmp

                    Filesize

                    320KB

                  • memory/3268-6-0x0000000004FA0000-0x0000000005006000-memory.dmp

                    Filesize

                    408KB

                  • memory/4452-51-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4452-47-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4452-48-0x0000000005A30000-0x0000000005A40000-memory.dmp

                    Filesize

                    64KB

                  • memory/4912-60-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4912-61-0x0000000005100000-0x0000000005110000-memory.dmp

                    Filesize

                    64KB

                  • memory/4912-63-0x0000000074F00000-0x00000000756B0000-memory.dmp

                    Filesize

                    7.7MB