1. Theory of the “Dropped Apple” method.
2. Practice of the “Dropped Apple” method (Real test on a real company).The “Dropped Apple” method is a physical variation of the classic “Trojan horse” scheme: an attacker leaves an infected device within reach of potential victims. In 2026, this approach is still encountered in pentest scenarios, although it has transformed to fit modern realities — while CD disks were once common, today USB drives and even microSD cards take center stage. The device is disguised as a legitimate item, and a accompanying label is designed to arouse curiosity and encourage use.
A classic example: the device is labeled with a corporate logo and an intriguing phrase like “Payroll Records Q1 2007.” The “dropping” spot is chosen so the device is sure to be noticed: a lobby, break room, restroom, or parking lot. An employee may either insert the device into a computer out of curiosity or, acting with good intentions, take the find to the IT department — which, ironically, is the primary goal of the attack.
Theory of the “Dropped Apple” MethodI found this method extremely interesting, and in early 2026, I decided to test it in practice as part of a legitimate pentest. The target was an organization I was familiar with (its name is not disclosed for obvious reasons). After analyzing the environment, I settled on a USB drive.
The software part of the “apple” consisted of two independent modules:
An installer referenced by autorun.ini;
The actual payload (the “apple”).
Preliminary reconnaissance showed that the office universally used AntiVirus software with an “Anti Hacker” module and a built-in firewall. This immediately ruled out the possibility of silently exfiltrating data over the network: any attempts at network activity would almost certainly be blocked.
Initially, I considered sending an SMS notification like “Hello from Apple: Mission completed” after trigger, but the firewall blocked this possibility. Since a direct communication channel was closed, I needed to make the user themselves initiate contact with us. Therefore, the “apple” carried neither espionage nor destructive functions: its task was purely demonstrative.
The functionality of the “apple” was deliberately simple but effective:
- Creating a text file C:\ap.txt with a greeting message and an explanation of the situation;
- Changing the titles of all available windows and buttons to the phrase “See C:\ap.txt.”
This approach increased the likelihood that the user would notice the anomaly and seek help. The message also contained an instruction: “For correct removal of this software, contact…” — creating an illusion of a potential threat if improperly removed, further motivating contact.
In reality, removal could be done using standard tools without any risk to the system. Given the presence of KAV, there was a possibility that hidden registry writes would be intercepted, so I implemented not only a hidden installation mechanism but also an immediate forced launch of the payload. This reduced stealth but guaranteed execution even with active protection.
Practice of the “Dropped Apple” MethodThe finished image was written to a USB drive. All that remained was to design the device to attract maximum attention. After discussing with colleagues, we settled on a concise but intriguing label: “Apple” — this was enough to spark interest.
The initial plan was to enter the organization’s premises and place the drive on a windowsill in the restroom. However, the reliability of this approach raised serious doubts: according to regulations, any found item must be handed over to the system administrator, but in practice, scenarios could vary.
To increase the chances of a controlled outcome, I used a small trick: I arranged with security to hand the drive directly to the system administrator, explaining that it had been found on the designated windowsill. On the appointed day, I arrived at the organization, coordinated all the details, performed the necessary actions, and returned home to wait for feedback over the next few days.
Unfortunately, the system administrator did not reach out on his own. So I contacted him myself and found out the details. It turned out that security had indeed handed the drive to the administrator, who inserted it into a computer running MS Windows where autorun was not disabled — and the installer started successfully. However, at the forced launch stage, the intrusion detection system (IDS) triggered: it detected suspicious activity and blocked further script execution.
The main reason for the failure was the payload’s behavior patterns: they appeared suspicious to the IDS and were classified as potentially dangerous. In the 2026 environment, modern protection systems actively analyze not only signatures but also behavioral patterns, so even relatively harmless actions can trigger security rules.
The experiment produced two clear results:- The principle of the “Dropped Apple” method was confirmed: the device reached the target environment, autorun worked, and the installer began execution.
- The intrusion detection system timely identified the anomaly and prevented the attack from developing.
Thus, the delivery and activation mechanism itself proved functional, but modern security measures in 2026 are capable of effectively blocking even such demonstration scenarios.
Final thoughts: With proper adaptation of the payload to a specific infrastructure and careful refinement of behavioral patterns, the method’s success chances increase significantly. On the other hand, this experiment clearly demonstrates how important it is to train employees not only to avoid using found devices but also to respond correctly to such discoveries.
P.S.
The “Dropped Apple” method remains an effective tool in the social engineering testing arsenal. If the payload had been additionally obfuscated or packaged considering the specific security solutions of the target environment, the probability of its undetected execution in August 2026 could have been significantly higher.Read the original text>>>
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