/Apollo

A .NET Framework 4.0 Windows Agent

Primary LanguageC#BSD 3-Clause "New" or "Revised" LicenseBSD-3-Clause

Apollo

Apollo is a Windows agent written in C# using the 4.0 .NET Framework designed to be used in SpecterOps training offerings.

Installation

To install Apollo, you'll need Mythic installed on a remote computer. You can find installation instructions for Mythic at the Mythic project page.

From the Mythic install directory, use the following command to install Apollo as the root user:

./mythic-cli payload install github https://github.com/MythicAgents/Apollo.git

From the Mythic install directory, use the following command to install Apollo as a non-root user:

sudo -E ./mythic-cli payload install github https://github.com/MythicAgents/Apollo.git

Once installed, restart Mythic to build a new agent.

Notable Features

  • P2P Communication
  • Credential Tracking and Manipulation
  • Unmanged PE, .NET Assembly, and PowerShell Script Execution
  • User Exploitation Suite
  • SOCKSv5 Support

Commands Manual Quick Reference

Command Syntax Description
assembly_inject assembly_inject -PID [pid] -Assembly [assembly] -Arguments [args] Execute .NET assembly in remote process.
blockdlls blockdlls -EnableBlock [false] Block non-Microsoft signed DLLs from loading into post-ex jobs.
cat cat -Path [file] Retrieve the output of a file.
cd cd -Path [dir] Change working directory.
cp cp -Path [source] -Destination [destination] Copy a file from path to destination.
dcsync dcsync -Domain contoso.local [-User username -DC dc.ip] DCSync one or more user credentials
download download -Path [path] [-Host [hostname]] Download a file off the target system.
execute_assembly execute_assembly -Assembly [assembly.exe] -Arguments [args] Execute a .NET assembly registered with register_file
execute_pe execute_pe -PE [binary.exe] -Arguments [args] Execute a statically compiled executable that's been registered with register_file
exit exit Task agent to exit.
get_injection_techniques get_injection_techniques Show currently registered injection techniques as well as the current technique.
getprivs getprivs Enable as many privileges as possible for the current access token.
inject inject Inject a new payload into a remote process.
inline_assembly inline_assembly -Assembly [Assembly.exe] -Arguments [Additional Args] Execute a .NET assembly in the currently executing process that's been registered with register_file
jobkill jobkill [jid] Kill a running job in the agent.
jobs jobs List all running jobs.
keylog_inject keylog_inject -PID [pid] Inject a keylogger into a remote process.
kill kill -PID [pid] Attempt to kill the process specified by [pid].
link link Link to a P2P agent via SMB or TCP. Modal popup only.
load load command1 command2 ... Load new commands into the agent.
ls ls [-Path [path]] List files and folders in [path]. Defaults to current working directory.
make_token make_token Impersonate a user using plaintext credentials. Modal popup.
mimikatz mimikatz -Command [args] Execute Mimikatz with the specified arguments.
mkdir mkdir -Path [dir] Create a directory.
mv mv -Path [source] -Destination [destination] Move a file from source to destination. Modal popup.
net_dclist net_dclist [domain.local] List all domain controllers for the current or specified domain.
net_localgroup_member net_localgroup_member -Group [groupname] [-Computer [computername]] Retrieve membership information from a specified group on a given computer.
net_localgroup net_localgroup [computer] Retrieve local groups known by a computer. Default to localhost.
net_shares net_shares [-Computer [computer]] Show shares of a remote PC.
powerpick powerpick -Command [command] Executes PowerShell in a sacrificial process.
powershell powershell -Command [command] Executes PowerShell in your currently running process.
powershell_import powershell_import Register a new .ps1 file to be used in other PowerShell jobs
ppid ppid -PID [pid_integer] Set the PPID of sacrificial jobs to the specified PID.
printspoofer printspoofer -Command [command] Execute a command in SYSTEM integrity so long as you have SeImpersonate privileges.
ps ps List process information.
psinject psinject -PID [pid] -Command [command] Executes PowerShell in the process specified by [pid]. Note: Currently stdout is not captured of child processes if not explicitly captured into a variable or via inline execution (such as $(whoami)).
pth pth -Domain [domain] -User [username] -NTLM [ntlm_hash] [-AES128 [aes128_key] -AES256 [aes256_key] -Run [program.exe]] Use mimikatz's pth module to spawn a process with alternate credentials.
pwd pwd Print working directory.
reg_query reg_query -Hive [HKCU:\|HKU:\|HKLM:\|HKCR:\] [-Key [keyname]] Query all subkeys of the specified registry path. Needs to be of the format HKCU:\, HKLM:\, or HKCR:\.
reg_write_value reg_write_value -Hive [HKCU:|HKU:|HKLM:|HKCR:\] -Key [keyname] [-Name [value_name] -Value [value_value]] Write specified values to the registry keys.
register_assembly register_assembly Register a .NET assembly with the agent to be used in .NET post-exploitation activities
register_file register_file Register a file to the agent's file cache. Used to store assemblies, executables, and PowerShell scripts.
rev2self rev2self Revert the access token to the original access token.
rm rm -Path [path] [-Host [hostname] -File [filename]] Remove a file specified by [path]. Alternatively, if -File is provided, -Path will be used as the directory, and -File will be the filename.
run run -Executable [binary.exe] -Arguments [args] Runs the binary specified by [binary.exe] with passed arguments (if any).
sc sc [-Query|-Start|-Stop|-Create|-Delete] [-Computer [computername] -DisplayName [display_name] -ServiceName [servicename] -BinPath [binpath]] .NET implementation of the Service Control Manager.
screenshot_inject screenshot_inject -PID [pid] [-Interval [int] -Count [int]] Get a screenshot of the desktop session associated with PID every Interval seconds for Count screenshots.
screenshot screenshot Get a screenshot of the current screen.
set_injection_technique set_injection_technique [technique] Set the injection technique used in post-ex jobs that require injection.
shell shell [command] Run a shell command which will translate to a process being spawned with command line: cmd.exe /S /c [command]
shinject shinject Inject given shellcode into a specified pid. Modal popup only.
sleep sleep [seconds] Set the callback interval of the agent in seconds.
socks socks -Port [port] Standup the socks server to proxy network traffic, routable via Mythic on [port].
spawn spawn Spawn a new callback in the postex process specified by spawnto_*.
spawnto_x64 spawnto_x64 -Application [path] -Arguments [args] Sets the process used in jobs requiring sacrificial processes to the specified [path] with arguments [args].
spawnto_x86 spawnto_x86 -Application [path] -Arguments [args] Sets the process used in jobs requiring sacrificial processes to the specified [path] with arguments [args].
steal_token steal_token [pid] Attempts to steal the process's primary token specified by [pid] and apply it to our own session.
unlink unlink Unlink a callback linked to via the link command. Modal popup only.
upload upload Upload a file to a remote path on the machine. Modal popup only.
whoami whoami Report access token for local and remote operations.

Supported C2 Profiles

HTTP Profile

The HTTP profile calls back to the Mythic server over the basic, non-dynamic profile. When selecting options to be stamped into Apollo at compile time, all options are respected with the exception of those parameters relating to GET requests.

SMB Profile

Establish communications over SMB named pipes. By default, the named pipe name will be a randomly generated GUID.

TCP Profile

Establish communications over a specified network socket. Note: If unelevated, the user may receive a prompt to allow communications from the binary to occur over the network.

SOCKSv5 Support

Apollo can route SOCKS traffic regardless of what other commands are compiled in. To start the socks server, issue socks -Port [port]. This starts a SOCKS server on the Mythic server which is proxychains4 compatible. To stop the SOCKS proxy, navigate to the SOCKS page in the Mythic UI and terminate it.

Quality of Life Improvements

File Triage

The ls command reports back a wealth of information and allows operators to easily copy file paths and examine permissions of files, in addition to being able to sort and filter files. Clicking the icon under the ACLs column will show all the permissions of a file. Additionally, this hooks into Mythic's native file browser.

This shows typical ls output: ls browserscript

Interfaces with Mythic's filebrowser and caches data server-side: ls mythic builtin

Process Listings

When issuing ps, additional details are retrieved such as:

  • Company name of the process executable
  • Description of the process executable
  • Full path of the process
  • Integrity level of the process
  • Desktop session
  • Process command line arguments

This process listing also interfaces with Mythic's builtin process browser, which allows you to see process trees more easily.

Lastly, the associated browser script will do row highlighting based on the process's name (in a one-to-one port of this script)

ps

Portable Executable, Assembly, and PowerShell Script Caching

Apollo can cache files for expeditious task execution. In general, control flow follows the register_file command followed by whatever command you wish to execute (execute_assembly, powerpick, execute_pe, etc.). These files are cached client side via DPAPI encrypted AES256 blobs, preventing their signatures being exposed outside of task execution.

Dynamic Injection Techniques

The agent can change what code injection technique is in use by post-exploitation jobs that require injection through a suite of injection commands. Currently, injection techniques that are supported:

  • CreateRemoteThread
  • QueueUserAPC (Early Bird)

injection

Job Tracking

Agent jobs are tracked by job ID, by command, and by the arguments passed to the command so that you know what job correlates to what tasking.

jobs

Artifact Tracking

Commands that manipulate the disk, create new logons, or spawn new processes will document those changes in the Artifact Reporting page as shown below.

artifacts

And more!

There's a number of niceities that come with pairing an agent to Mythic - too many to list in one README. Install the agent and see for yourself!

Special Thanks

A big thanks goes to those who have contributed to the project in both major and minor ways.