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Analysis

  • max time kernel
    136s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    11/03/2025, 12:55

General

  • Target

    f1cc61e9f5c6582068587a299af11e0c.exe

  • Size

    1005KB

  • MD5

    f1cc61e9f5c6582068587a299af11e0c

  • SHA1

    8411f0e9b01e4ff7fce473e05f2ff34bd4d452a3

  • SHA256

    6cc902a129311aaac4f40644029251ed2fc60a9138cb705d85e556deaf5d5cff

  • SHA512

    cabae307fda0635670d07247de662796e988fb0080c0bae05d93d9bd64f5112266268738cdd7549aefb368c6818ffa73e9e7b9f166fdd791cbba3b12c14b54b4

  • SSDEEP

    12288:RO64ectxdIsRVIEmfds397GSP32CXE4H932CXEa/M:R57YgswEodslGSf2CPHJ2CJ/M

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

niiarmah.kozow.com:9301

niiarmah.duckdns.org:9301

Mutex

10406b63-713b-4c08-b037-a196ecfc3de2

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    niiarmah.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-08-24T03:26:43.193669336Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    9301

  • default_group

    Default

  • 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

    10406b63-713b-4c08-b037-a196ecfc3de2

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    niiarmah.kozow.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.

  • Nanocore family
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 1 IoCs

    When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 2 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f1cc61e9f5c6582068587a299af11e0c.exe
    "C:\Users\Admin\AppData\Local\Temp\f1cc61e9f5c6582068587a299af11e0c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2292
    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
      2⤵
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:2120
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:/Users/Admin/AppData/Local/Temp/f1cc61e9f5c6582068587a299af11e0c.exe" "%appdata%\Antispyware\Security.exe" /Y
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "%appdata%\Antispyware\Security.exe.lnk" /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2772
      • 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\Antispyware\Security.exe.lnk" /f
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2884
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > %appdata%\Antispyware\Security.exe:Zone.Identifier
      2⤵
      • Subvert Trust Controls: Mark-of-the-Web Bypass
      • System Location Discovery: System Language Discovery
      • NTFS ADS
      PID:2800
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ren "%appdata%\Antispyware\Security.exe.jpg" Security.exe
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2876
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Roaming\Antispyware\Security.exe.bat
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2640
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 300
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Antispyware\Security.exe

    Filesize

    1005KB

    MD5

    f1cc61e9f5c6582068587a299af11e0c

    SHA1

    8411f0e9b01e4ff7fce473e05f2ff34bd4d452a3

    SHA256

    6cc902a129311aaac4f40644029251ed2fc60a9138cb705d85e556deaf5d5cff

    SHA512

    cabae307fda0635670d07247de662796e988fb0080c0bae05d93d9bd64f5112266268738cdd7549aefb368c6818ffa73e9e7b9f166fdd791cbba3b12c14b54b4

  • C:\Users\Admin\AppData\Roaming\Antispyware\Security.exe.bat

    Filesize

    209B

    MD5

    b0d86bf8ebf3a961a9eb244c9387f47b

    SHA1

    1227e30c2504575ce80830e78fe8d97ec98d2994

    SHA256

    6e544573bfd75d9c8846e8a6fe037b20874e8f10fc7559c18af52f01e789f856

    SHA512

    ec987050df366b71d0d098cccf1d667e9284581b0b7206b8e1ebaa4345fe6a8175732f8ce8210e6fd7c9ea95a8d5bf57e1159c712a4524a886441c92f9f56e01

  • \Users\Admin\AppData\Local\Temp\svhost.exe

    Filesize

    255KB

    MD5

    9af17c8393f0970ee5136bd3ffa27001

    SHA1

    4b285b72c1a11285a25f31f2597e090da6bbc049

    SHA256

    71d6a7a3fe5f8dc878cd5bdeca0e09177efb85c01e9a8a10a95262cabefaa019

    SHA512

    b90f7de7d5ce72dccb264c7ba609e173c529b9d99ed9a63f88632bc58b1a994bbb727365f519c73b979f8918bd6de3c39a9f0347eb3a4bccdce4b2772a6516a3

  • memory/2120-25-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-29-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2120-8-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-50-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2120-22-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-18-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-17-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-14-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/2120-12-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-49-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2120-28-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2120-10-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2120-33-0x0000000000730000-0x000000000073A000-memory.dmp

    Filesize

    40KB

  • memory/2120-34-0x0000000000A30000-0x0000000000A4E000-memory.dmp

    Filesize

    120KB

  • memory/2120-35-0x0000000000750000-0x000000000075A000-memory.dmp

    Filesize

    40KB

  • memory/2120-6-0x0000000000080000-0x00000000000B8000-memory.dmp

    Filesize

    224KB

  • memory/2292-1-0x00000000003B0000-0x00000000004B2000-memory.dmp

    Filesize

    1.0MB

  • memory/2292-48-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2292-27-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2292-0-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

    Filesize

    4KB

  • memory/2292-51-0x0000000073CC0000-0x00000000743AE000-memory.dmp

    Filesize

    6.9MB