Analysis

  • max time kernel
    149s
  • 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
    18/02/2024, 06:01

General

  • Target
    a94efd2fd4a39e5412ae71262505321a76acccfbedd2b9aa0417721740be6bfd.exe
  • Size 1.1MB
  • Sample240218-grbb8sfb52
  • SHA256 a94efd2fd4a39e5412ae71262505321a76acccfbedd2b9aa0417721740be6bfd
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • december2n.duckdns.org:64418

  • december2nd.ddns.net:64418

Mutex
  • d334376c-c2dc-4ef6-ba5b-7e6bd3ad949e

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    december2nd.ddns.net

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2023-11-18T21:10:07.370333236Z

  • 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

    64418

  • 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

    d334376c-c2dc-4ef6-ba5b-7e6bd3ad949e

  • 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\a94efd2fd4a39e5412ae71262505321a76acccfbedd2b9aa0417721740be6bfd.exe
    "C:\Users\Admin\AppData\Local\Temp\a94efd2fd4a39e5412ae71262505321a76acccfbedd2b9aa0417721740be6bfd.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5028
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\njbs.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1424
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /release
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /release
          4⤵
          • Gathers network information
          PID:2476
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c bgdkvivi.pdf muqoddjmm.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1532
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\bgdkvivi.pdf
          bgdkvivi.pdf muqoddjmm.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1192
          • 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:3268
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "NAT Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8BD5.tmp"
              6⤵
              • Creates scheduled task(s)
              PID:2744
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "NAT Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8C14.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:4052
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /renew
          4⤵
          • Gathers network information
          PID:1520

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        abshrg.bin

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\abshrg.bin
        • Size 555B
        • SHA256 84b0eecaee8342d1060cf5b4cbeec19924a7f58c0b8875d8585095362fc26283
        • MD5 SHA1 SHA512

        aucvqqsf.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\aucvqqsf.mp3
        • Size 585B
        • SHA256 73f237cab438c273b1822241988abdd41bd62aac8d927144ef959d4200330225
        • MD5 SHA1 SHA512

        bgdkvivi.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bgdkvivi.pdf
        • Size 880KB
        • SHA256 7bf426c11ea43614ef02e5373de0e53f54e785342d56c13182daa2849e9e3776
        • MD5 SHA1 SHA512 SSDEEP

        brchlc.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\brchlc.exe
        • Size 547B
        • SHA256 5b2fd39c048ed343ccc6aa14549bb6855c9064a5370c5ed619115f4931968430
        • MD5 SHA1 SHA512

        bvah.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bvah.mp2
        • Size 530B
        • SHA256 802ba672dda19711c9bca7b475d617048913a68dab6e0449ed2a914438485de5
        • MD5 SHA1 SHA512

        bvgngdua.ion

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bvgngdua.ion
        • Size 397KB
        • SHA256 387d82cff1d49af17926ec4a71ac6f64c9a707b59941ff6ac79c8ddb5dfc32d9
        • MD5 SHA1 SHA512 SSDEEP

        crep.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\crep.ppt
        • Size 561B
        • SHA256 f97a44799b53286db44568581a146841caa01e7e730c5afd1f91ce679de01ecc
        • MD5 SHA1 SHA512

        cuftul.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\cuftul.icm
        • Size 568B
        • SHA256 4e154ca6e55b3ceb20e736d365836ea80fcaf17c17c850acdc425c157b9fa6e8
        • MD5 SHA1 SHA512

        emimdptx.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\emimdptx.3gp
        • Size 530B
        • SHA256 dfd968769991d84a179d9c667bc9133e408430410fd71b64c7dcf535d835ea17
        • MD5 SHA1 SHA512

        ffdjr.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ffdjr.xl
        • Size 589B
        • SHA256 3a77df968a2fa1ec230bc3f076b0e2c207cc4773c6b1bd940fee595b173bc5d4
        • MD5 SHA1 SHA512

        fkrv.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\fkrv.xl
        • Size 592B
        • SHA256 6b1e3f22b35010cc2154d4cdc1e99e4ac2479497331d21007964c07636119935
        • MD5 SHA1 SHA512

        gtvneoomfe.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\gtvneoomfe.msc
        • Size 523B
        • SHA256 3f880e0058983e991c421a0f9a397720a1065131902a26a254c3ab17c7d91fae
        • MD5 SHA1 SHA512

        hnicfp.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\hnicfp.mp2
        • Size 531B
        • SHA256 8f6dae4b9d6d74e19fedc62a4951a7fe598e0246ed686932b6393ef07d7bd49d
        • MD5 SHA1 SHA512

        ixxdnhxtl.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ixxdnhxtl.msc
        • Size 563B
        • SHA256 f13a1240a32a83072ff39fcdbfe27eabcdecaa571e568db2ff336453c10571c3
        • MD5 SHA1 SHA512

        jcnhfq.mp2

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\jcnhfq.mp2
        • Size 555B
        • SHA256 65e76c61afa263936cea3db229ea8ea794243e30097b2e02f8971f116c8ab805
        • MD5 SHA1 SHA512

        jkvuik.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\jkvuik.mp3
        • Size 543B
        • SHA256 c638d512d0fc690a664e86e1b144f4fd57a5a06c0e0aaeb0180f5fcf91625bd4
        • MD5 SHA1 SHA512

        kiwd.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\kiwd.icm
        • Size 529B
        • SHA256 f73bfb3471aceb7d331b60ff6a858c12979854c066fbad58725d4c4b66e0e534
        • MD5 SHA1 SHA512

        lcdegh.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\lcdegh.pdf
        • Size 580B
        • SHA256 89f1910f232a9ac075d2690b3d4d628f4819ca8c7f3b5ae9599a41f93ff37c95
        • MD5 SHA1 SHA512

        lkep.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\lkep.pdf
        • Size 537B
        • SHA256 85a7bcc54a6861e6bfa7bf421c4a7f865f22cc63c835fb562677efc460118e15
        • MD5 SHA1 SHA512

        muqoddjmm.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\muqoddjmm.exe
        • Size 34.8MB
        • SHA256 98481337f0e629b7f555dcc9befd92ae1886026cc50178c9f4cc62f4d074b462
        • MD5 SHA1 SHA512 SSDEEP

        njbs.vbe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\njbs.vbe
        • Size 78KB
        • SHA256 53d41342aee2c95afd557b00a84c41abff38473ea4345b60fa4c06f7955f2e69
        • MD5 SHA1 SHA512 SSDEEP

        oxki.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\oxki.icm
        • Size 652B
        • SHA256 ea918a2a868717c211386679c3f895f3e15786c924a1486b98dbfcb07bb9a82d
        • MD5 SHA1 SHA512

        pecirrj.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\pecirrj.icm
        • Size 626B
        • SHA256 209fe091d96dacc2b566da5e62d6b663e0dce57c562265fcf5f6d01d12a38b6a
        • MD5 SHA1 SHA512

        ptpcxuwm.dat

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ptpcxuwm.dat
        • Size 523B
        • SHA256 4f16f9234b831ec237328729a32b43fea7591c4fd84698ef79f0861243acf1bf
        • MD5 SHA1 SHA512

        qcct.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qcct.ppt
        • Size 520B
        • SHA256 d7ec57f4a37ec92f326ea156d2ad8edd26ca265fc8ff3a1ffeab3ee60b8ec174
        • MD5 SHA1 SHA512

        qenghasdd.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qenghasdd.ppt
        • Size 528B
        • SHA256 299173a4983b0d9fa3d9c4895777be7865bb4f83de15b21a959d12a31a482d5e
        • MD5 SHA1 SHA512

        qqmmqxj.bin

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qqmmqxj.bin
        • Size 530B
        • SHA256 51fcbbfd8bd4c3e2d74173752fe48bf426994f701ab667eb10b7b4688bb4e2eb
        • MD5 SHA1 SHA512

        ripb.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ripb.3gp
        • Size 37KB
        • SHA256 6c1f6dfee865d060a4b3bac44000434349c29a046301244dfa93219f3e686684
        • MD5 SHA1 SHA512 SSDEEP

        ripb.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\ripb.3gp
        • Size 37KB
        • SHA256 cf8417e662ad643d6fb51ed020ddc8e6f2a746a1416d1027a9134aa03f32674e
        • MD5 SHA1 SHA512 SSDEEP

        rmhevstjp.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rmhevstjp.docx
        • Size 545B
        • SHA256 1a9a95d5ae25341dd4818d54edec52c9cf74848cd800d1a1326030b1bb097343
        • MD5 SHA1 SHA512

        rqejup.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rqejup.icm
        • Size 522B
        • SHA256 a51aa17fc49b6a34fb066561daa6efd81846d01c67ebe7dc4dcbafbd3a9f9a7d
        • MD5 SHA1 SHA512

        uisncwcf.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\uisncwcf.pdf
        • Size 615B
        • SHA256 db23acb916cd5585245c135c2102377d641b053fe179c92826ba034d5772523f
        • MD5 SHA1 SHA512

        vcef.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\vcef.exe
        • Size 598B
        • SHA256 d5c41e6ba2568a4bd80559b7a236701f3a295a206a294a55685332c5262b6306
        • MD5 SHA1 SHA512

        wqpwrue.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\wqpwrue.mp3
        • Size 557B
        • SHA256 f47e6d00532cd7adcc68bdf58c3ecf3f650ea46e89983906afe192eaf79d6709
        • MD5 SHA1 SHA512

        xrajrakn.bin

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xrajrakn.bin
        • Size 525B
        • SHA256 71f504d07a43bd7d62753805a93fdf7e4aaa197771c90f244a294893e4bc57d8
        • MD5 SHA1 SHA512

        RegSvcs.exe

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

        tmp8BD5.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp8BD5.tmp
        • Size 1KB
        • SHA256 8d9642e1c3cd1e0b5d1763de2fb5e605ba593e5a918b93eec15acbc5dcc48fd4
        • MD5 SHA1 SHA512

        tmp8C14.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp8C14.tmp
        • Size 1KB
        • SHA256 52cdb418384a912c5b7071c92d7761f0d12250f07dbbb31876eb2e8d65acbae7
        • MD5 SHA1 SHA512

        memory/3268-202-0x000000000D6A0000-0x000000000D6AA000-memory.dmp

        memory/3268-197-0x0000000072AB0000-0x0000000073260000-memory.dmp

        memory/3268-199-0x000000000D5F0000-0x000000000D682000-memory.dmp

        memory/3268-200-0x000000000D730000-0x000000000D7CC000-memory.dmp

        memory/3268-201-0x000000000D990000-0x000000000D9A0000-memory.dmp

        memory/3268-196-0x0000000001350000-0x000000000138A000-memory.dmp

        memory/3268-193-0x0000000001350000-0x0000000002350000-memory.dmp

        memory/3268-198-0x000000000DB00000-0x000000000E0A4000-memory.dmp

        memory/3268-210-0x000000000D720000-0x000000000D72A000-memory.dmp

        memory/3268-211-0x000000000D900000-0x000000000D90C000-memory.dmp

        memory/3268-212-0x000000000D910000-0x000000000D92E000-memory.dmp

        memory/3268-213-0x000000000E730000-0x000000000E73A000-memory.dmp

        memory/3268-215-0x0000000072AB0000-0x0000000073260000-memory.dmp

        memory/3268-216-0x000000000D990000-0x000000000D9A0000-memory.dmp