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|imagecaption = The '''Madoka.exe''' icon. | |imagecaption = The '''Madoka.exe''' icon. | ||
}} | }} | ||
'''Madoka.exe''', also known as the '''Ghost virus''' or the '''Sadako virus''' in Japan, was a Taiwanese [[screamer]] [[program]], which is a variant of the Win32/FlaGhost | '''Madoka.exe''', also known as the '''Ghost virus''' or the '''Sadako virus''' in Japan, was a Taiwanese [[screamer]] [[program]], which is a variant of the Win32/FlaGhost malware. The original author is Qiwen Lin (林 啟文), and it was written in the [[wikipedia:Hot_Soup_Processor|Hot Soup Processor]] programming language. | ||
== Payload == | ==Payload== | ||
When the user runs the malware by executing the [[.exe | When the user runs the malware by executing the [[.exe]] directly, a picture of an Asian woman in full screen is displayed along with the "introduce dialogue" Chinese text showing line by line in the upper-left corner of the screen. However, a ghost version of the woman in the image will appear briefly along with a scream sound effect, before immediately returning to the original image. | ||
Before showing the initial payload, the malware will copy itself to Windows directory as | Before showing the initial payload, the malware will copy itself to the Windows directory as <code>ozawa.exe</code> and try to append itself to <code>win.ini</code> in order to auto start with the operating system. Judging from the decompiled source code, this only works on [[wikipedia:Windows 98|Windows 98]] and [[wikipedia:Windows ME|Windows ME]]. On [[wikipedia:Windows_XP|Windows XP]] or higher, there is no ''Run'' section in <code>win.ini</code> and the malware will not work apart from the initial payload. | ||
If the malware is launched from the system directory | If the malware is launched from the system directory as <code>ozawa.exe</code>, either from auto start or double clicking manually in the system directory, it will enter "reside mode" without showing the initial payload with the normal woman picture. Instead, it runs in background. It will then show the screamer image along with the scream sound effect indefinitely in the following intervals: 3 minutes, 10 minutes, 30 minutes, 60 minutes, and then subsequently every 60 minutes. | ||
If the user executes the original | If the user executes the original .exe once again after infection, the normal woman picture and the "meet-again dialogue" text will be shown and there is no screamer picture. | ||
The program also records the number of executions of the original | The program also records the number of executions of the original .exe (not the one in system directory) in <code>win.ini</code>. If it is run over 5 times, the malware will show the "bye dialogue" with the normal woman picture, then uninstall itself. | ||
== Dialogue == | == Dialogue== | ||
<tabber> | <tabber> | ||
Introduce Dialogue= | Introduce Dialogue= | ||
| Line 72: | Line 72: | ||
</tabber> | </tabber> | ||
== Trivia == | ==Trivia== | ||
* The original EXE accepts arguments. The accepted arguments are shown below: | *The original EXE accepts arguments. The accepted arguments are shown below: | ||
** '''/inst''': Install to system directory silently, without the initial payload. | ** '''/inst''': Install to system directory silently, without the initial payload. | ||
** '''/unst''': Uninstall the installation | **'''/unst''': Uninstall the installation | ||
** '''/ver''': Show an about dialog message box with version | **'''/ver''': Show an about dialog message box with version | ||
* According to the decompiled source code, holding down F10 when double clicking the original EXE will cause the malware to decompile itself and unpack all the assets and codes. However, this behavior is tested not working on a WinXP virtual machine. | * According to the decompiled source code, holding down F10 when double clicking the original EXE will cause the malware to decompile itself and unpack all the assets and codes. However, this behavior is tested not working on a WinXP virtual machine. | ||
