![]() ![]() Recovering Passwords by Measuring Residual Heat The moral isn’t a good one: if you bring your laptop in to be repaired, you should expect the technician to snoop through your hard drive, taking what they want. There would probably be more snooping by American repair technicians. Two, some of the results were inconclusive, which indicated-but did not prove-log tampering by the technicians. One: this is a very small study-only twelve laptop repairs. The researchers added documents, both sexually revealing and non-sexual pictures, and a cryptocurrency wallet with credentials.Ī few notes. All of the laptops were set up with email and gaming accounts and populated with browser history across several weeks. Half of the laptops were configured to appear as if they belonged to a male and the other half to a female. The researchers chose that glitch because it required only a simple and inexpensive repair, was easy to create, and didn’t require access to users’ personal files. All were free of malware and other defects and in perfect working condition with one exception: the audio driver was disabled. The laptops were freshly imaged Windows 10 laptops. In one, the researcher explained they had installed antivirus software and performed a disk cleanup to “remove multiple viruses on the device.” The researchers received no explanation in the other case. As noted earlier, two of the visits resulted in the logs the researchers relied on being unrecoverable. In three cases, Windows Quick Access or Recently Accessed Files had been deleted in what the researchers suspect was an attempt by the snooping technician to cover their tracks. Devices belonging to females were more likely to be snooped on, and that snooping tended to seek more sensitive data, including both sexually revealing and non-sexual pictures, documents, and financial information. The logs showed that technicians from six of the locations had accessed personal data and that two of those shops also copied data onto a personal device. ![]() Researchers at University of Guelph in Ontario, Canada, recovered logs from laptops after receiving overnight repairs from 12 commercial shops. Laptop technicians routinely violate the privacy of the people whose computers they repair: MacOS.OSAMiner can parse the output of the native system_profiler tool to determine if the machine is running with 4 cores.Computer Repair Technicians Are Stealing Your Data Virtualization/Sandbox Evasion: System Checks MacOS.OSAMiner has used launchctl to restart the Launch Agent. MacOS.OSAMiner can gather the device serial number and has checked to ensure there is enough disk space using the Unix utility df. MacOS.OSAMiner has used ps ax | grep | grep -v grep |. MacOS.OSAMiner has embedded Stripped Payloads within another run-only Stripped Payloads. Obfuscated Files or Information: Embedded Payloads MacOS.OSAMiner has used run-only Applescripts, a compiled and stripped version of AppleScript, to remove human readable indicators to evade detection. Obfuscated Files or Information: Stripped Payloads MacOS.OSAMiner has used curl to download a Stripped Payloads from a public facing adversary-controlled webpage. macOS.OSAMiner also searches the operating system's install.log for apps matching its hardcoded list, killing all matching process names. MacOS.OSAMiner has searched for the Activity Monitor process in the System Events process list and kills the process if running. MacOS.OSAMiner has placed a Stripped Payloads with a plist extension in the Launch Agent's folder. Ĭreate or Modify System Process: Launch Agent ![]() MacOS.OSAMiner has used osascript to call itself via the do shell script command in the Launch Agent. Enterprise Layer download view Techniques Used DomainĬommand and Scripting Interpreter: AppleScript
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