Analysis

  • max time kernel
    147s
  • max time network
    151s
  • 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, 11:31

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:1624
    • 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:4636
    • 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:3624
      • 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:3324
        • 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:1212
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
        2⤵
          PID:2684
      • 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:4168
        • 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:1180
          • 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:3724
          • C:\Windows\SysWOW64\cmd.exe
            "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
            2⤵
              PID:4140
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
              2⤵
                PID:3160
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\explorer\explorer.exe'" /f
              1⤵
              • Creates scheduled task(s)
              PID:2920
            • 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:4844
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
                2⤵
                  PID:2000
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\explorer"
                  2⤵
                    PID:2604
                  • 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:2204
                    • 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:2196
                  • 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:1588

                  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\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/1624-12-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1624-1-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1624-5-0x0000000002760000-0x0000000002770000-memory.dmp

                    Filesize

                    64KB

                  • memory/1624-6-0x0000000004EE0000-0x0000000004F46000-memory.dmp

                    Filesize

                    408KB

                  • memory/1624-0-0x0000000000200000-0x0000000000250000-memory.dmp

                    Filesize

                    320KB

                  • memory/1624-4-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1624-2-0x0000000002760000-0x0000000002770000-memory.dmp

                    Filesize

                    64KB

                  • memory/1624-3-0x00000000051A0000-0x0000000005744000-memory.dmp

                    Filesize

                    5.6MB

                  • memory/2000-57-0x00000000056E0000-0x00000000056F0000-memory.dmp

                    Filesize

                    64KB

                  • memory/2000-56-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/2000-59-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3160-49-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3160-44-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/3160-46-0x0000000005280000-0x0000000005290000-memory.dmp

                    Filesize

                    64KB

                  • memory/4168-47-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4168-42-0x0000000004A20000-0x0000000004A30000-memory.dmp

                    Filesize

                    64KB

                  • memory/4168-41-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4168-40-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4636-11-0x0000000005A50000-0x0000000005AEC000-memory.dmp

                    Filesize

                    624KB

                  • memory/4636-34-0x0000000007190000-0x00000000071A4000-memory.dmp

                    Filesize

                    80KB

                  • memory/4636-28-0x00000000070F0000-0x00000000070FE000-memory.dmp

                    Filesize

                    56KB

                  • memory/4636-27-0x00000000070E0000-0x00000000070EC000-memory.dmp

                    Filesize

                    48KB

                  • memory/4636-26-0x00000000070D0000-0x00000000070E2000-memory.dmp

                    Filesize

                    72KB

                  • memory/4636-25-0x00000000070C0000-0x00000000070CE000-memory.dmp

                    Filesize

                    56KB

                  • memory/4636-24-0x0000000007090000-0x00000000070AA000-memory.dmp

                    Filesize

                    104KB

                  • memory/4636-23-0x0000000007080000-0x0000000007092000-memory.dmp

                    Filesize

                    72KB

                  • memory/4636-36-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4636-39-0x0000000005C20000-0x0000000005C30000-memory.dmp

                    Filesize

                    64KB

                  • memory/4636-31-0x0000000007130000-0x0000000007144000-memory.dmp

                    Filesize

                    80KB

                  • memory/4636-32-0x0000000007150000-0x000000000715E000-memory.dmp

                    Filesize

                    56KB

                  • memory/4636-33-0x0000000007160000-0x000000000718E000-memory.dmp

                    Filesize

                    184KB

                  • memory/4636-30-0x0000000007110000-0x0000000007120000-memory.dmp

                    Filesize

                    64KB

                  • memory/4636-29-0x0000000007100000-0x0000000007114000-memory.dmp

                    Filesize

                    80KB

                  • memory/4636-19-0x00000000066A0000-0x00000000066BE000-memory.dmp

                    Filesize

                    120KB

                  • memory/4636-20-0x00000000068E0000-0x00000000068EA000-memory.dmp

                    Filesize

                    40KB

                  • memory/4636-18-0x0000000006610000-0x000000000661A000-memory.dmp

                    Filesize

                    40KB

                  • memory/4636-7-0x0000000000400000-0x0000000000438000-memory.dmp

                    Filesize

                    224KB

                  • memory/4636-16-0x0000000005B50000-0x0000000005B5A000-memory.dmp

                    Filesize

                    40KB

                  • memory/4636-10-0x00000000059B0000-0x0000000005A42000-memory.dmp

                    Filesize

                    584KB

                  • memory/4636-15-0x0000000005C20000-0x0000000005C30000-memory.dmp

                    Filesize

                    64KB

                  • memory/4636-9-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4844-58-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4844-53-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/4844-52-0x0000000074A80000-0x0000000075230000-memory.dmp

                    Filesize

                    7.7MB