Analysis

  • max time kernel
    146s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    06-05-2024 09:20

General

  • Target

    PO-B1120017228.exe

  • Size

    256KB

  • MD5

    8c810e18058e24ff54a30a44e040569a

  • SHA1

    b0329f16013e786898cd75c101565fa70850be03

  • SHA256

    0e07d406f33fbf19219ea60e644cfd634fc8c934508bb608a6a1a3f13db1cc5a

  • SHA512

    f9beeaf52b85d01596382b2d5a64922332fea7f4894c24eeeae45ad07ba80cd70800a81e29f13922accc1d922b0ba56e8456a24bd03f0f1e51c623f2cc6726e1

  • SSDEEP

    6144:PZJR0bf1uc1p4wp/vNClO74ahHmJGhygfke7WLSaRnG:hiD1pR/Vv74aJygfkeSLv

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

happiboi.hopto.org:1122

Mutex

985ac1b8-7476-4608-8827-7b04eef2179c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    happiboi.hopto.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2018-06-08T16:18:15.234143736Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    1122

  • default_group

    Jnr Boi

  • 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

    985ac1b8-7476-4608-8827-7b04eef2179c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    happiboi.hopto.org

  • 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.

  • Drops startup file 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO-B1120017228.exe
    "C:\Users\Admin\AppData\Local\Temp\PO-B1120017228.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe"
      2⤵
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:2936
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\winlogon\winlogon.exe.lnk" /f
        3⤵
          PID:2560
      • C:\Users\Admin\AppData\Roaming\tmp.exe
        "C:\Users\Admin\AppData\Roaming\tmp.exe"
        2⤵
        • Executes dropped EXE
        PID:2644
      • C:\Users\Admin\AppData\Local\Temp\PO-B1120017228.exe
        "C:\Users\Admin\AppData\Local\Temp\PO-B1120017228.exe"
        2⤵
        • Checks whether UAC is enabled
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1708
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "NAS Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5C34.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:2480
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c C:\Users\Admin\AppData\Roaming\winlogon\winlogon.exe.bat
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2504
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 300
          3⤵
          • Delays execution with timeout.exe
          PID:2864

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp5C34.tmp

      Filesize

      1KB

      MD5

      e5cc560fef620b58811b19ec54168440

      SHA1

      a6d5d68e2009bb12ffd49c5251d26fe973f7e10f

      SHA256

      82da477cdf0dc2ed8197afd69d702e34240578250c233b489dfe5e8472f56b75

      SHA512

      64e5b751072bb0eea1b36dd6385be0b824e90db08fac384ce02f63a51b9a23ad7efd2ac7c71d5c2f1f2f7018c881335dae321ed96c821adca5d9b58ed6ec7bb6

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

      Filesize

      256KB

      MD5

      8c810e18058e24ff54a30a44e040569a

      SHA1

      b0329f16013e786898cd75c101565fa70850be03

      SHA256

      0e07d406f33fbf19219ea60e644cfd634fc8c934508bb608a6a1a3f13db1cc5a

      SHA512

      f9beeaf52b85d01596382b2d5a64922332fea7f4894c24eeeae45ad07ba80cd70800a81e29f13922accc1d922b0ba56e8456a24bd03f0f1e51c623f2cc6726e1

    • C:\Users\Admin\AppData\Roaming\winlogon\winlogon.exe.bat

      Filesize

      194B

      MD5

      a6a348e297488daf6ff46dfa30aae8b2

      SHA1

      df8d695405da71f61dc6640882ce942271ae5695

      SHA256

      877588837ba56aebb4e60e060f881401a081fdc852e6cdea71086d86b6f82daa

      SHA512

      82227ba2d19b6b8ee1fe0f4a034b1725a33fb524d53bc045c471da724798ccd2327173fb1b113056a31e09fd228059f6335050ceeb4c0f33f349b60caa49a3ba

    • \Users\Admin\AppData\Roaming\tmp.exe

      Filesize

      203KB

      MD5

      aee43daf7741caca297366c1b3847064

      SHA1

      1489823a4d9b9a1af0c0b68d4f9736b2e4e8760c

      SHA256

      86f69803a5ef3352b380deeb1f13a31ea64a284ef468aa383c18a362f0136533

      SHA512

      2ae87b23504e2fa2b5cf971c3aa90dd5169b7d867608e1ed03519545904bcf512a2798cd1efb2cd781a96e7e146ce346cd2470fb77fcf9a8633928fee31f7f15

    • memory/1688-0-0x0000000074121000-0x0000000074122000-memory.dmp

      Filesize

      4KB

    • memory/1688-1-0x0000000074120000-0x00000000746CB000-memory.dmp

      Filesize

      5.7MB

    • memory/1688-2-0x0000000074120000-0x00000000746CB000-memory.dmp

      Filesize

      5.7MB

    • memory/1688-51-0x0000000074120000-0x00000000746CB000-memory.dmp

      Filesize

      5.7MB

    • memory/1688-50-0x0000000074120000-0x00000000746CB000-memory.dmp

      Filesize

      5.7MB

    • memory/1688-48-0x0000000074120000-0x00000000746CB000-memory.dmp

      Filesize

      5.7MB

    • memory/1708-29-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-26-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-22-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-32-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1708-33-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-31-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/1708-24-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2644-44-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

      Filesize

      9.6MB

    • memory/2644-45-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

      Filesize

      9.6MB

    • memory/2644-49-0x000007FEF51F0000-0x000007FEF5B8D000-memory.dmp

      Filesize

      9.6MB

    • memory/2644-21-0x000007FEF54AE000-0x000007FEF54AF000-memory.dmp

      Filesize

      4KB