Analysis

  • max time kernel
    151s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/01/2024, 16:56

General

  • Target
    D0C61FB5FB2118A060B04E5FA0898A6F.exe
  • Size 1.1MB
  • Sample240129-vfsn2aeeb5
  • SHA256 333d68c6bff4c107f9f4b95c51c5471aa56c03469d8d155bd949902ada3af5fa
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • december2n.duckdns.org:65517

  • december2nd.ddns.net:65517

Mutex
  • 82525767-13bf-4d56-98a7-2902deae19f0

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    december2nd.ddns.net

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2023-11-03T11:07:15.094337336Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    65517

  • default_group

    NO GREE

  • 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

    82525767-13bf-4d56-98a7-2902deae19f0

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    december2n.duckdns.org

  • primary_dns_server

  • 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 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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).

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\D0C61FB5FB2118A060B04E5FA0898A6F.exe
    "C:\Users\Admin\AppData\Local\Temp\D0C61FB5FB2118A060B04E5FA0898A6F.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4348
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\dmfr.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /release
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2284
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /release
          4⤵
          • Gathers network information
          PID:3444
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c hoqswiu.pdf fdlsnqx.bmp
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2980
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\hoqswiu.pdf
          hoqswiu.pdf fdlsnqx.bmp
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4992
          • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
            "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
            5⤵
            • Executes dropped EXE
            • 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:4580
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA311.tmp"
              6⤵
              • Creates scheduled task(s)
              PID:5044
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpA4F6.tmp"
              6⤵
              • Creates scheduled task(s)
              PID:4964
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /renew
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2828
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /renew
          4⤵
          • Gathers network information
          PID:536

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        artgomvxwg.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\artgomvxwg.mp2
        • Size 536B
        • SHA256 2e68aa4d4e997de5e69dd03f5194357baa59217d0aeb2443a1f24f5fcd556f17
        • MD5 SHA1 SHA512

        bikq.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bikq.mp3
        • Size 560B
        • SHA256 b28880f92724dafe92fe476c25ec3f5f2c945c53f2896fdd54821e1a12397390
        • MD5 SHA1 SHA512

        cbsd.dll

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\cbsd.dll
        • Size 635B
        • SHA256 6c2b239f27515f84af20f3d83b46f62746e7d257e69c1978ec99dd43dbfc3556
        • MD5 SHA1 SHA512

        dmfr.vbe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\dmfr.vbe
        • Size 79KB
        • SHA256 bc729ab3697a5056ee1db60dac43fc65922cfbd7379f95af5d8ea055699a9a9d
        • MD5 SHA1 SHA512 SSDEEP

        ebxrwq.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ebxrwq.icm
        • Size 523B
        • SHA256 f398083d5dd4b82e50195d699a7a039b1f43c2f9a40edcf5b58f85544840b46f
        • MD5 SHA1 SHA512

        efckuvw.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\efckuvw.icm
        • Size 599B
        • SHA256 00a6a4cbe2b5ff6f0a54ef32e75b5771876b2a3f0335392cb7c3f979c80b25bb
        • MD5 SHA1 SHA512

        eixglpqv.txt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\eixglpqv.txt
        • Size 505B
        • SHA256 960dc03d7018cb982eb4c046e00c9bf25abc76ec8068d4291ef6477f6e1dcbba
        • MD5 SHA1 SHA512

        epxvxs.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\epxvxs.msc
        • Size 595B
        • SHA256 faf5e2ebb82417f716c1675b4b54c2d706b631ae3d9781dc6584be94a944895b
        • MD5 SHA1 SHA512

        ewrp.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ewrp.msc
        • Size 526B
        • SHA256 04d2b93ac5a73ffab6c6e797a29f9c4c5ca77111f22a79943f83cb62b121539a
        • MD5 SHA1 SHA512

        fdlsnqx.bmp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\fdlsnqx.bmp
        • Size 45.6MB
        • SHA256 31226f1b474fe7f1e642daec9cf15b740d01b71cc18c4208af81887ec041eec9
        • MD5 SHA1 SHA512 SSDEEP

        hoqswiu.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\hoqswiu.pdf
        • Size 925KB
        • SHA256 98e4f904f7de1644e519d09371b8afcbbf40ff3bd56d76ce4df48479a4ab884b
        • MD5 SHA1 SHA512 SSDEEP

        hspd.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\hspd.xl
        • Size 602B
        • SHA256 51a6f297c5969776068f461e3b14f592c51b55906f7e3bfa31d409d6593f29c7
        • MD5 SHA1 SHA512

        idihusnmkj.txt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\idihusnmkj.txt
        • Size 603B
        • SHA256 86c94192518e92fe0d4437bc9ae206d22900c0b341be2acf18d9806aff379dab
        • MD5 SHA1 SHA512

        iqvmiqdg.dat

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\iqvmiqdg.dat
        • Size 511B
        • SHA256 7a76db9039637c0dd52db6eee5912d7ef74db1acf15c0f1371d362a64cfe1171
        • MD5 SHA1 SHA512

        joxvgqgic.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\joxvgqgic.docx
        • Size 42KB
        • SHA256 05c9c605d88dc357628d5bd1548eacb0ed655508b4e23d2c604f445b24547645
        • MD5 SHA1 SHA512 SSDEEP

        joxvgqgic.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\joxvgqgic.docx
        • Size 42KB
        • SHA256 93c5856beb68041860fdd26aced2920a055eb392b8287d2a077328e56ce8dfd5
        • MD5 SHA1 SHA512 SSDEEP

        kqpmclvh.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\kqpmclvh.icm
        • Size 589B
        • SHA256 5b857a091d2377f08661ecdf849002c904418ba3f06450e024bb4141e8e93c05
        • MD5 SHA1 SHA512

        kwnhirt.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\kwnhirt.mp3
        • Size 656B
        • SHA256 6463a94998fc4630b81363576ac528bad80e6536c05dc515b1eda406be18d111
        • MD5 SHA1 SHA512

        mmjebtqagk.jpg

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mmjebtqagk.jpg
        • Size 665B
        • SHA256 f7892e0daec55585b35f219e4f7729d30e1a7b1472b3912bd6920571140cc01b
        • MD5 SHA1 SHA512

        mslasbof.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mslasbof.xl
        • Size 557B
        • SHA256 0cf294455f57f19f15151ae7699d4139e5628beb789c97b911357b5c9d23a223
        • MD5 SHA1 SHA512

        nijmm.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\nijmm.ppt
        • Size 519B
        • SHA256 e52e6fb605701c5c71c81118377cd07b19233d326de679762a28b2a65ab44255
        • MD5 SHA1 SHA512

        nksrrpsb.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\nksrrpsb.mp2
        • Size 564B
        • SHA256 e005ee9613914909886fb0e2e537374816daa7c0f7d36e96da8fac2be57bc62f
        • MD5 SHA1 SHA512

        orjf.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\orjf.xl
        • Size 615B
        • SHA256 a58d756fdd082086a48fd19489e36f839a44aec9e090302d998695e51f179dea
        • MD5 SHA1 SHA512

        qhjdldwhb.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qhjdldwhb.docx
        • Size 630B
        • SHA256 6573e5182425c3d1d48b278db71775fe7f5c98b30f146518bd8bd58f0955cc81
        • MD5 SHA1 SHA512

        qjnlr.guj

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qjnlr.guj
        • Size 397KB
        • SHA256 c99afe3293b9e04d0f0674195464380dd978c39f8bd962a5bc8bb1ed2b05dd5f
        • MD5 SHA1 SHA512 SSDEEP

        rhscamk.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rhscamk.icm
        • Size 629B
        • SHA256 d410a2bb68be75f9bb9c83c4d026908ea68942fc36813a9a881e6664e8d2eef4
        • MD5 SHA1 SHA512

        rldttwjc.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rldttwjc.icm
        • Size 561B
        • SHA256 6fc9ddad7a5b248cede9845d0a927c224f2f3e735bd0bf794614a3027fcfa940
        • MD5 SHA1 SHA512

        ttfwbaq.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ttfwbaq.icm
        • Size 519B
        • SHA256 44975d5f580712d4531455a5451ae63ffebf5af5faa8c74281e261c96b91aa8a
        • MD5 SHA1 SHA512

        vstrjffk.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\vstrjffk.ppt
        • Size 600B
        • SHA256 ea2c72c03551c041d49839f57f444f84345a0d566108ff8a634029221b2b3d1f
        • MD5 SHA1 SHA512

        wiskm.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\wiskm.3gp
        • Size 672B
        • SHA256 ba464faa06a6a181cee0e82d1618fd8bd9285fb43fc555ecab757e9e1c24d39a
        • MD5 SHA1 SHA512

        RegSvcs.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        • Size 44KB
        • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
        • MD5 SHA1 SHA512 SSDEEP

        tmpA311.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpA311.tmp
        • Size 1KB
        • SHA256 8d9642e1c3cd1e0b5d1763de2fb5e605ba593e5a918b93eec15acbc5dcc48fd4
        • MD5 SHA1 SHA512

        tmpA4F6.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpA4F6.tmp
        • Size 1KB
        • SHA256 39b16b3a00b6b43c6820357127228c0768a577153014ce7b0ea3c585244dc08b
        • MD5 SHA1 SHA512

        memory/4580-172-0x0000000072710000-0x0000000072EC0000-memory.dmp

        memory/4580-190-0x0000000072710000-0x0000000072EC0000-memory.dmp

        memory/4580-175-0x000000000F7B0000-0x000000000F842000-memory.dmp

        memory/4580-176-0x000000000F850000-0x000000000F8EC000-memory.dmp

        memory/4580-177-0x000000000F700000-0x000000000F710000-memory.dmp

        memory/4580-178-0x000000000F760000-0x000000000F76A000-memory.dmp

        memory/4580-186-0x000000000FD30000-0x000000000FD3A000-memory.dmp

        memory/4580-173-0x0000000000C00000-0x0000000000C3A000-memory.dmp

        memory/4580-174-0x000000000FD60000-0x0000000010304000-memory.dmp

        memory/4580-187-0x000000000FD50000-0x000000000FD5C000-memory.dmp

        memory/4580-188-0x0000000010850000-0x000000001086E000-memory.dmp

        memory/4580-189-0x0000000010870000-0x000000001087A000-memory.dmp

        memory/4580-168-0x0000000000C00000-0x0000000001C00000-memory.dmp

        memory/4580-191-0x000000000F700000-0x000000000F710000-memory.dmp