fix reverse append

Author: its-a-feature

Payload_Type/poseidon/poseidon/agent_code/CHANGELOG.MD

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 2.0.33 - 2024-03-29
+
+### Changed
+
+- fix reverse append function
+
 ## 2.0.32 - 2024-03-29
 
 ### Changed

Payload_Type/poseidon/poseidon/agent_code/pkg/profiles/httpx.go

@@ -559,7 +559,7 @@ func (c *C2HTTPx) transformAppendReverse(prev []byte, value string) ([]byte, err
 	if len(value) > len(prev) {
 		return nil, errors.New("append value is longer that full value")
 	}
-	return prev[:len(value)], nil
+	return prev[:len(prev)-len(value)], nil
 }
 
 func (c *C2HTTPx) transformXor(prev []byte, value string) ([]byte, error) {
@@ -734,7 +734,7 @@ func (c *C2HTTPx) CreateDynamicMessage(content []byte, isGetTaskingRequest bool)
 	}
 	var bodyBuffer *bytes.Buffer
 	var bodyBytes []byte
-	utils.PrintDebug(fmt.Sprintf("sending message: %s", string(content)))
+	utils.PrintDebug(fmt.Sprintf("original message message: %s", string(content)))
 	agentMessageBytes, err := c.performTransforms(content, variation)
 	if err != nil {
 		utils.PrintDebug(fmt.Sprintf("Failed to create message: %s", err.Error()))

Payload_Type/poseidon/poseidon/agentfunctions/builder.go

@@ -19,7 +19,7 @@ import (
 	"strings"
 )
 
-const version = "2.0.32"
+const version = "2.0.33"
 
 var payloadDefinition = agentstructs.PayloadType{
 	Name:                                   "poseidon",

agent_capabilities.json

@@ -10,6 +10,6 @@
   "architectures": ["x86_64", "arm_64"],
   "c2": ["http", "websocket", "dynamichttp", "poseidon_tcp"],
   "mythic_version": "3.2.20-rc7",
-  "agent_version": "2.0.32",
+  "agent_version": "2.0.33",
   "supported_wrappers": []
 }