PuttyHijack V1.0 - Hijack SSH/PuTTY Connections on Windows

PuttyHijack is a POC tool that injects a dll into the PuTTY process to hijack an existing, or soon to be created, connection.



This can be useful during penetration tests when a windows box that has been compromised is used to SSH/Telnet into other servers. The injected DLL installs some hooks and creates a socket for acallback connection that is then used for input/output redirection.


It does not kill the current connection, and will cleanly uninject if the socket or process is stopped.


Details


1) Start a nc listener

2) Run PuttyHijack specify the listener ip and port

3) Watch the echoing of everything including passwords





Some basic commands in this version include;


!disco - disconnect the real putty from the display!reco - reconnect it!exit - just another way to exit the injected shell


You can download PuttyHijack V1.0 here:
PuttyHijackV1.0.rar
Or read more here.

PuttyHijack V1.0 - Hijack SSH/PuTTY Connections on Windows

PuttyHijack is a POC tool that injects a dll into the PuTTY process to hijack an existing, or soon to be created, connection.

This can be useful during penetration tests when a windows box that has been compromised is used to SSH/Telnet into other servers. The injected DLL installs some hooks and creates a socket for acallback connection that is then used for input/output redirection.

It does not kill the current connection, and will cleanly uninject if the socket or process is stopped.

Details

1) Start a nc listener
2) Run PuttyHijack specify the listener ip and port
3) Watch the echoing of everything including passwords


Some basic commands in this version include;

!disco - disconnect the real putty from the display!reco - reconnect it!exit - just another way to exit the injected shell

You can download PuttyHijack V1.0 here:
PuttyHijackV1.0.rar
Or read more here.

TSGrinder - Brute Force Terminal Services Server

This is a tool that has been around quite some time too, it’s still very useful though and it’s a very niche tool specifically for brute forcing Windows Terminal Server.

TSGrinder is the first production Terminal Server brute force tool, and is now in release 2. The main idea here is that the Administrator account, since it cannot be locked out for local logons, can be brute forced. And having an encrypted channel to the TS logon process sure helps to keep IDS from catching the attempts.

TSGringer is a “dictionary” based attack tool, but it does have some interesting features like “l337″ conversion, and supports multiple attack windows from a single dictionary file. It supports multiple password attempts in the same connection, and allows you to specify how many times to try ausername/password combination within a particular connection.

You can download TSGrinder 2.0.3 here:
tsgrinder-2.03.zip

Note that the tool requires the Microsoft Simulated Terminal Server Client tool, “roboclient,” which may be found here:
roboclient.zip
Or read more here.

Vista Security Feature - Teredo Protocol Analysis

Teredo is a platform-independent protocol developed by Microsoft, which is enabled by default in Windows Vista. Teredo provides a way for nodes located behind an IPv4 NAT to connect to IPv6 nodes on the Internet. However, by tunneling IPv6 traffic over IPv4 UDP through the NAT and directly to the end node, Teredo raises some security concerns.

Primary concerns include bypassing security controls, reducing defense in depth, and allowing unsolicited traffic. Additional security concerns associated with the use of Teredo include the capability of remote nodes to open the NAT for themselves, benefits to worms, ways to deny Teredo service, and the difficulty in finding all Teredo traffic to inspect.
You can find the report here:
Teredo Security [PDF]

Fake NetBIOS Tool - Simulate Windows Hosts

Some cool free tools made by folks from the French Honeynet Project.
FakeNetBIOS is a family of tools designed to simulate Windows hosts on a LAN. The individual tools are:

FakeNetbiosDGM (NetBIOS Datagram)
FakeNetbiosNS (NetBIOS Name Service)

Each tool can be used as a standalone tool or as a honeyd responder or subsystem.

FakeNetbiosDGM sends NetBIOS Datagram service packets on port UDP 138 to simulate Windows hosts bradcasts. It sends periodically NetBIOS announces over the network to simulate Windows computers. It fools the Computer Browser services running over the LAN and so on.

FakeNetbiosNS is a NetBIOS Name Service daemon, listening on port UDP 137. It responds to NetBIOS Name requests like real Windows computers: for example ‘ping -a’, ‘nbtstat -A’ and ‘nbtstat -a’, etc.

You can download the tools here:
FakeNetBIOS-0.91.zip
There are a few others things here:
http://honeynet.rstack.org/tools.php

Nemesis - Packet Injection Suite

Nemesis is a command-line network packet crafting and injection utility for UNIX-like and Windows systems. Nemesis, is well suited for testing Network Intrusion Detection Systems, firewalls, IP stacks and a variety of other tasks. As a command-line driven utility, Nemesis is perfect for automation and scripting.

Nemesis can natively craft and inject packets for:
ARP
DNS
ETHERNET
ICMP
IGMP
IP
OSPF
RIP
TCP
UDP

Using the IP and the Ethernet injection modes, almost any custom packet can be crafted and injected.

Unix-like systems require: libnet-1.0.2a, and a C compiler (GCC)Windows systems require: libnetNT-1.0.2g and either WinPcap-2.3 or WinPcap-3.0

Download it here:
Source code: nemesis-1.4.tar.gz (Build 26)Windows binary: nemesis-1.4.zip (Build 26) (includes LibnetNT)

You can read more here:
Nemisis at Sourceforge

ARP Scanning and Fingerprinting Tool - arp-scan

NTA-Monitor has released the arp-scan detection and fingerprinting tool under the open source (LGPL license) concept.

It has been tested under various Linux based operating systems and seems to work fine.

This will only compile on Linux systems. You will need a C compiler, the “make” utility and the appropriate system header files to compile arp-scan. It uses autoconf and automake, so compilation and installation is the normal ./configure; make; make install process.

You can download arp-scan here:
http://www.nta-monitor.com/tools/arp-scan/download/arp-scan-1.4.tar.gz

Please read the man pages arp-scan(1), arp-fingerprint(1) and get-oui(1) before using this tool.

Babel Enterprise - Cross Platform System Auditing Tool

Babel Enterprise is a systems auditing tool. Babel performs a security level check of the machine, or hardening. The check consists of a number of auditing tests that obtain a snap of the security status of each machine. The result is a security index of the system that is given after each execution. It a non-intrusive tool, meaning that it does not make any changes in the system at all. It simply takes note of what is not working properly and reports it to the user. .

Babel Enterprise has being designed to manage security on many different systems, different technologies and versions, and different issues and requirements. It is a distributed management system, multi-user, that allows redundant installation in all its critical components. Each change occurring in the system can be watched and marked automatically each time a new audit policy is executed. Users can add, delete or modify existing elements to see exactly if the system works better or worse and why. Babel Enterprise uses a pragmatic approach, evaluating those aspects of the system the represent a security risk and that can be improved with the intervention of an administrator.

Babel Enterprise has a version of its agent for each of the latest Microsoft operating systems, Windows 2003 and Windows XP, and the main Unix system: Solaris 10, AIX 5.x, SUSE GNU/Linux 9 ES and Ubuntu Dapper, although they can be easily adapted to different versions and other UNIX OSs (such as BDS or HP-UX )

Babel currently has modules for auditing many different aspects of system security. These are some examples of currently implemented audit modules:
Service minimization.
Centralized file hashing.
Anomalous SUID0 executable detection.
File permissions checker.
Password strength tests.
Generic registry lookup (Windows)
Remote services configuration.
Audit for Kernel networking and security parameters.
Apache2 configuration auditing
User accounts auditing
Root environment audit
UID0 users detection.
Centralized patch management.
Centralized software inventory.
Listening ports auditing.
Inetd / Xinetd minimization.

You can download the latest stable version of Babel Enterprise here:
Babel Enterprise 1.0 version.
Or read more here.

Using the capture command in a Cisco Systems PIX firewall.

This is an excellent article you might find useful covering the use of the capture command in Cisco PIX firewalls.

A vital tool to use when troubleshooting computer networking problems and monitoring computer networks is a packet sniffer. That being said, one of the best methods to use when troubleshooting connection problems or monitoring suspicious network activity in a Cisco Systems PIX firewall is by using the capture command. Many times Cisco TAC will request captures from a PIX in PCAP format for open problem tickets associated with unusual problems or activity associated with the PIX and the network.

Cisco kit can be a bit daunting for a newcomer, but very well featured, it’s important to learn what your PIX can do!

The capture command was first introduced to the PIX OS in version 6.2 and has the ability to capture all data that passes through the PIX device. You can use access-lists to specify the type of traffic that you wish to capture, along with the source and destination addresses and ports. Multiple capture statements can be used to attach the capture command to multiple interfaces. You can even copy the raw header and hexadecimal data in PCAP format to a tftp server and open it with TCPDUMP or Ethereal.

NOTE: You must be in privileged mode to invoke the capture command.
Full article here.

IPAudit - Network Activity Monitor with Web Interface

IPAudit monitors network activity on a network by host, protocol and port. It listens to a network device in promiscuous mode, and records every connection between two ip addresses. A unique connection is determined by the ip addresses of the two machines, the protocol used between them, and the port numbers (if they are communicating via udp or tcp).

IPAudit can be used to monitor network activity for a variety of purposes. It has proved useful for monitoring intrusion detection, bandwith consumption and denial of service attacks. It can be used with IPAudit-Web to provide web based network reports.

IPAudit is a free network monitoring program available and extensible under the GNU GPL.
IPAudit is a command line tool that uses the libpcap library to listen to traffic and generate data. The IPAudit-Web package includes the IPAudit binary in addition to the web interface that creates reports based on the collected data. Using the Web package is recommended, as it gives you a slick graphical interface complete with traffic charts and a search feature.

You can download IPAudit here:

IPAudit 0.95 - Latest stable version of IPAudit
Or read more here.
You can also find a very good introduction to IPAudit by SecurityFocus here.

argus - Auditing Network Activity - Performance & Status Monitoring

Another tool for the security side, good for forensics, monitoring and auditing.

Argus is a fixed-model Real Time Flow Monitor designed to track and report on the status and performance of all network transactions seen in a data network traffic stream. Argus provides a common data format for reporting flow metrics such as connectivity, capacity, demand, loss, delay, and jitter on a per transaction basis. The record format that Argus uses is flexible and extensible, supporting generic flow identifiers and metrics, as well as application/protocol specific information.

Argus can be used to analyze and report on the contents of packet capture files or it can run as a continuous monitor, examining data from a live interface; generating an audit log of all the network activity seen in the packet stream. Argus can be deployed to monitor individual end-systems, or an entire enterprises network activity. As a continuous monitor, Argus provides both push and pull data handling models, to allow flexible strategies for collecting network audit data. Argus data clients support a range of operations, such as sorting, aggregation, archival and reporting. There is XML support for Argus data, which makes handling Argus data a bit easier.

Argus currently runs on Linux, Solaris, FreeBSD, OpenBSD, NetBSD, and MAC OS X and its client programs have also been ported to Cygwin. The software should be portable to many versions of Unix with little or no modification. Performance is such that auditing an entire enterprises Internet activity can be accomplished using modest computing resources.

You can download argus here:
argus-2.0.6 (various options available)
Or read more here.