DDKONG (57dd0828-79d7-11e8-a7d8-57db14e1ef24)
The malware in question is configured with the following three exported functions: ServiceMain,Rundll32Call, DllEntryPoint. The ServiceMain exported function indicates that this DLL is expected to be loaded as a service. If this function is successfully loaded, it will ultimately spawn a new instance of itself with the Rundll32Call export via a call to rundll32.exe. The Rundll32Call exported function begins by creating a named event named ‘RunOnce’. This event ensures that only a single instance of DDKong is executed at a given time. If this is the only instance of DDKong running at the time, the malware continues. If it’s not, it dies. This ensures that only a single instance of DDKong is executed at a given time. DDKong attempts to decode an embedded configuration using a single byte XOR key of 0xC3. After this configuration is decoded and parsed, DDKONG proceeds to send a beacon to the configured remote server via a raw TCP connection. The packet has a header of length 32 and an optional payload. In the beacon, no payload is provided, and as such, the length of this packet is set to zero. After it sends the beacon, the malware expects a response command of either 0x4 or 0x6. Both responses instruct the malware to download and load a remote plugin. In the event 0x4 is specified, the malware is instructed to load the exported ‘InitAction’ function. If 0x6 is specified, the malware is instructed to load the exported ‘KernelDllCmdAction’ function. Prior to downloading the plugin, the malware downloads a buffer that is concatenated with the embedded configuration and ultimately provided to the plugin at runtime. As we can see in the above text, two full file paths are included in this buffer, providing us with insight into the original malware family’s name, as well as the author. After this buffer is collected, the malware downloads the plugin and loads the appropriate function. This plugin provides the attacker with the ability to both list files and download/upload files on the victim machine.
| Cluster A | Galaxy A | Cluster B | Galaxy B | Level |
|---|---|---|---|---|
| DDKONG (57dd0828-79d7-11e8-a7d8-57db14e1ef24) | Tool | DDKONG (cae8384d-b01b-4f9c-a31b-f693e12ea6b2) | Malpedia | 1 |