Analysis

  • max time kernel
    145s
  • 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, 11:34

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 2 IoCs
  • 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 1 IoCs
  • Suspicious use of WriteProcessMemory 40 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:3828
    • 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:1820
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
      2⤵
        PID:2616
      • 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:3892
        • 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:1276
          • 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:2000
      • 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:3312
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          2⤵
            PID:4572
          • 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:2680
            • 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:1756
              • 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:788
            • C:\Windows\SysWOW64\cmd.exe
              "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
              2⤵
                PID:4436
            • C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
              C:\Users\Admin\AppData\Roaming\explorer\explorer.exe
              1⤵
              • Executes dropped EXE
              PID:4980

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            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\Roaming\explorer\explorer.exe

              Filesize

              295KB

              MD5

              38699281db788537bea1ce577eb81ea9

              SHA1

              39e11046b7c615a047875ca3a0eafd20d583d693

              SHA256

              9598d353175682d82d7bbe9eca3d48c97552db2718e77007601f80541b7c8afb

              SHA512

              fd33f696fc92ed4d496088715dbc82ca7c67e3049b1855ca56c3576381677274cdd1d437ea98cb3774c5bef0106a2dbc984c97b8c680d243cee104c042357c3f

            • memory/1820-43-0x0000000000FD0000-0x0000000000FDE000-memory.dmp

              Filesize

              56KB

            • memory/1820-20-0x0000000005410000-0x0000000005420000-memory.dmp

              Filesize

              64KB

            • memory/1820-49-0x0000000001080000-0x0000000001094000-memory.dmp

              Filesize

              80KB

            • memory/1820-48-0x0000000001040000-0x000000000106E000-memory.dmp

              Filesize

              184KB

            • memory/1820-6-0x0000000000400000-0x0000000000438000-memory.dmp

              Filesize

              224KB

            • memory/1820-47-0x0000000001030000-0x000000000103E000-memory.dmp

              Filesize

              56KB

            • memory/1820-9-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/1820-10-0x0000000005070000-0x0000000005102000-memory.dmp

              Filesize

              584KB

            • memory/1820-13-0x00000000051B0000-0x000000000524C000-memory.dmp

              Filesize

              624KB

            • memory/1820-14-0x0000000005410000-0x0000000005420000-memory.dmp

              Filesize

              64KB

            • memory/1820-15-0x0000000005110000-0x000000000511A000-memory.dmp

              Filesize

              40KB

            • memory/1820-17-0x0000000005190000-0x000000000519A000-memory.dmp

              Filesize

              40KB

            • memory/1820-18-0x0000000005E00000-0x0000000005E1E000-memory.dmp

              Filesize

              120KB

            • memory/1820-38-0x0000000000EA0000-0x0000000000EB2000-memory.dmp

              Filesize

              72KB

            • memory/1820-19-0x0000000006040000-0x000000000604A000-memory.dmp

              Filesize

              40KB

            • memory/1820-21-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/1820-22-0x0000000005410000-0x0000000005420000-memory.dmp

              Filesize

              64KB

            • memory/1820-23-0x0000000005410000-0x0000000005420000-memory.dmp

              Filesize

              64KB

            • memory/1820-46-0x0000000001010000-0x0000000001024000-memory.dmp

              Filesize

              80KB

            • memory/1820-45-0x0000000000FF0000-0x0000000001000000-memory.dmp

              Filesize

              64KB

            • memory/1820-44-0x0000000000FE0000-0x0000000000FF4000-memory.dmp

              Filesize

              80KB

            • memory/1820-42-0x0000000000FC0000-0x0000000000FCC000-memory.dmp

              Filesize

              48KB

            • memory/1820-41-0x0000000000FB0000-0x0000000000FC2000-memory.dmp

              Filesize

              72KB

            • memory/1820-40-0x0000000000FA0000-0x0000000000FAE000-memory.dmp

              Filesize

              56KB

            • memory/1820-39-0x0000000000EB0000-0x0000000000ECA000-memory.dmp

              Filesize

              104KB

            • memory/3312-28-0x0000000004EF0000-0x0000000004F00000-memory.dmp

              Filesize

              64KB

            • memory/3312-27-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/3312-26-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/3312-32-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/3828-2-0x0000000004D40000-0x0000000004D50000-memory.dmp

              Filesize

              64KB

            • memory/3828-4-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/3828-0-0x0000000000510000-0x0000000000560000-memory.dmp

              Filesize

              320KB

            • memory/3828-3-0x0000000005300000-0x00000000058A4000-memory.dmp

              Filesize

              5.6MB

            • memory/3828-8-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/3828-5-0x0000000005080000-0x00000000050E6000-memory.dmp

              Filesize

              408KB

            • memory/3828-1-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/4572-33-0x0000000005260000-0x0000000005270000-memory.dmp

              Filesize

              64KB

            • memory/4572-35-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/4572-31-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/4980-53-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB

            • memory/4980-54-0x0000000001640000-0x0000000001650000-memory.dmp

              Filesize

              64KB

            • memory/4980-55-0x00000000748C0000-0x0000000075070000-memory.dmp

              Filesize

              7.7MB