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Remove source-code extension check #428

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Remove source-code extension check #428

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51 changes: 20 additions & 31 deletions eventhandler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -60,47 +60,36 @@ func (eventHandler *EventHandler) handleFileEvent(event *Event) {
// Uncomment to log file writes (only uncomment in INT env)
// WriteLog(fmt.Sprintf("file write %s, syscall %s", event.FileName, event.Syscall))

if isSourceCodeFile(event.FileName) {
_, found := eventHandler.SourceCodeMap[event.FileName]
if !found {
eventHandler.SourceCodeMap[event.FileName] = append(eventHandler.SourceCodeMap[event.FileName], event)
}
if found {
isFromDifferentProcess := false
for _, writeEvent := range eventHandler.SourceCodeMap[event.FileName] {
if writeEvent.Pid != event.Pid {
isFromDifferentProcess = true
}
_, found := eventHandler.SourceCodeMap[event.FileName]
if !found {
eventHandler.SourceCodeMap[event.FileName] = append(eventHandler.SourceCodeMap[event.FileName], event)
}
if found {
isFromDifferentProcess := false
for _, writeEvent := range eventHandler.SourceCodeMap[event.FileName] {
if writeEvent.Pid != event.Pid {
isFromDifferentProcess = true
}
}

if isFromDifferentProcess {
eventHandler.SourceCodeMap[event.FileName] = append(eventHandler.SourceCodeMap[event.FileName], event)
counter, found := eventHandler.FileOverwriteCounterMap[event.Exe]
if !found || counter < 3 {
checksum, err := getProgramChecksum(event.Exe)
if err == nil {
WriteLog(fmt.Sprintf("[Source code overwritten] file: %s syscall: %s by exe: %s [%s] Timestamp: %s", event.FileName, event.Syscall, event.Exe, checksum, event.Timestamp.Format("2006-01-02T15:04:05.999999999Z")))
// WriteAnnotation(fmt.Sprintf("StepSecurity Harden Runner: Source code overwritten file: %s syscall: %s by exe: %s", event.FileName, event.Syscall, event.Exe))
}

eventHandler.FileOverwriteCounterMap[event.Exe]++
if isFromDifferentProcess {
eventHandler.SourceCodeMap[event.FileName] = append(eventHandler.SourceCodeMap[event.FileName], event)
counter, found := eventHandler.FileOverwriteCounterMap[event.Exe]
if !found || counter < 3 {
checksum, err := getProgramChecksum(event.Exe)
if err == nil {
WriteLog(fmt.Sprintf("[Source code overwritten] file: %s syscall: %s by exe: %s [%s] Timestamp: %s", event.FileName, event.Syscall, event.Exe, checksum, event.Timestamp.Format("2006-01-02T15:04:05.999999999Z")))
// WriteAnnotation(fmt.Sprintf("StepSecurity Harden Runner: Source code overwritten file: %s syscall: %s by exe: %s", event.FileName, event.Syscall, event.Exe))
}

eventHandler.FileOverwriteCounterMap[event.Exe]++
}
}
}

eventHandler.fileMutex.Unlock()
}

func isSourceCodeFile(fileName string) bool {
// If it has an extension or might be a Dockerfile
if strings.Contains(fileName, ".") || strings.Contains(fileName, "Dockerfile") {
return true
}

return false
}

func (eventHandler *EventHandler) handleProcessEvent(event *Event) {
eventHandler.procMutex.Lock()

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