ColdFire : Golang Malware Development Library

ColdFire provides various methods useful for malware development in Golang.

Most functions are compatible with both Linux and Windows operating systems.

Installation

go get github.com/redcode-labs/ColdFire

Types Of Functions Included

• Logging
• Auxiliary
• Reconnaissance
• Evasion
• Administration
• Sandbox detection
• Disruptive

Documentation

Logging Functions

func F(s string, arg …interface{}) string
Alias for fmt.Sprintf
func PrintGood(msg string)
Print good status message
func PrintInfo(msg string)
Print info status message
func PrintError(msg string)
Print error status message
func PrintWarning(msg string)
Print warning status message

Auxiliary Functions

func FileToSlice(file string) []string
Read from file and return slice with lines delimited with newline.
func Contains(s interface{}, elem interface{}) bool
Check if interface type contains another interface type.
func StrToInt(string_integer string) int
Convert string to int.
func IntToStr(i int) string
Converts int to string.
func IntervalToSeconds(interval string) int
Converts given time interval to seconds.
func RandomInt(min int, max int) int
Returns a random int from range.
func RandomSelectStr(list []string) string
Returns a random selection from slice of strings.
func RandomSelectInt(list []int) int
Returns a random selection from slice of ints.
func RandomSelectStrNested(list [][]string) []string
Returns a random selection from nested string slice.
func RemoveNewlines(s string) string
Removes “\n” and “\r” characters from string.
func FullRemove(str string, to_remove string) string
Removes all occurences of substring.
func RemoveDuplicatesStr(slice []string) []string
Removes duplicates from string slice.
func RemoveDuplicatesInt(slice []int) []int
Removes duplicates from int slice.
func ContainsAny(str string, elements []string) bool
Returns true if slice contains a string.
func RandomString(n int) string
Generates random string of length [n]
func ExitOnError(e error)
Handle errors
func Md5Hash(str string) string
Returns MD5 checksum of a string
func MakeZip(zip_file string, files []string) error
Creates a zip archive from a list of files
func ReadFile(filename string) (string, error)
Read contents of a file.
func WriteFile(filename string) error
Write contents to a file.
func B64d(str string) string
Returns a base64 decoded string
func B64e(str string) string
Returns a base64 encoded string
func FileExists(file string) bool
Check if file exists.
func ParseCidr(cidr string) ([]string, error)
Returns a slice containing all possible IP addresses in the given range.

Reconnaissance Functions

func GetLocalIp() string
Returns a local IP address of the machine.
func GetGlobalIp() string
Returns a global IP address of the machine.
func IsRoot() bool
Check if user has administrative privilleges.
func Processes() (map[int]string, error)
Returns all processes’ PIDs and their corresponding names.
func Iface() string, string
Returns name of currently used wireless interface and it’s MAC address.
func Ifaces() []string
Returns slice containing names of all local interfaces.
func Disks() ([]string, error)
Lists local storage devices
func Users() []string, err
Returns list of known users.
func Info() map[string]string
Returns basic system information.
Possible fields: username, hostname, go_os, os,
platform, cpu_num, kernel, core, local_ip, ap_ip, global_ip, mac.
If the field cannot be resolved, it defaults to “N/A” value.
func DnsLookup(hostname string) ([]string, error)
Performs DNS lookup
func RdnsLookup(ip string) ([]string, error)
Performs reverse DNS lookup
func HostsPassive(interval string) []string, err
Passively discovers active hosts on a network using ARP monitoring.
Discovery time can be changed using argument.
func FilePermissions(filename string) (bool,bool)
Checks if file has read and write permissions.
func Portscan(target string, timeout, threads int) []int
Returns list of open ports on target.
func PortscanSingle(target string, port int) bool
Returns true if selected port is open.
func BannerGrab(target string, port int) (string, error)
Grabs a service banner string from a given port.
func Networks() ([]string, error)
Returns list of nearby wireless networks.

Administration Functions

func CmdOut(command string) string, error
Execute a command and return it’s output.
func CmdOutPlatform(commands map[string]string) (string, error)
Executes commands in platform-aware mode.
For example, passing {“windows”:”dir”, “linux”:”ls”} will execute different command,
based on platform the implant was launched on.
func CmdRun(command string)
Unlike cmd_out(), cmd_run does not return anything, and prints output and error to STDOUT.
func CmdDir(dirs_cmd map[string]string) ([]string, error)
Executes commands in directory-aware mode.
For example, passing {“/etc” : “ls”} will execute command “ls” under /etc directory.
func CmdBlind(command string)
Run command without supervision, do not print any output.
func CreateUser(username, password string) error
Creates a new user on the system.
func Bind(port int)
Run a bind shell on a given port.
func Reverse(host string, port int)
Run a reverse shell.
func SendDataTcp(host string, port int, data string) error
Sends string to a remote host using TCP protocol.
func SendDataUdp(host string, port int, data string) error
Sends string to a remote host using UDP protocol.
func Download(url string) error
Downloads a file from url and save it under the same name.
func CopyFile(src string, dst string) error
Copy a file from one place to another
func CurrentDirFiles() []string, error
Returns list of files from current directory

Evasion Functions

func PkillPid(pid int) error
Kill process by PID.
func PkillName(name string) errror
Kill all processes that contain [name].
func PkillAv() err
Kill most common AV processes.
func Wait(interval string)
Does nothing for a given interval of time.
func Remove()
Removes binary from the host.
func SetTtl(interval string)
Set time-to-live of the binary.
Should be launched as goroutine.
func ClearLogs() error
Clears most system logs.

Sandbox Detection Functions

func SandboxFilepath() bool
Detect sandbox by looking for common sandbox filepaths.
Compatible only with windows.
func SandboxProc() bool
Detect sandbox by looking for common sandbox processes.
func SandboxSleep() bool
Detect sandbox by looking for sleep-accelleration mechanism.
func SandboxDisk(size int) bool
Detect sandbox by looking for abnormally small disk size.
func SandboxCpu(cores int) bool
Detect sandbox by looking for abnormally small number of cpu cores.
func SandboxRam(ram_mb int) bool
Detect sandbox by looking for abnormally small amount of RAM.
func SandboxMac() bool
Detect sandbox by looking for sandbox-specific MAC address of the localhost.
func SandboxUtc() bool
Detect sandbox by looking for properly set UTC time zone.
func SandboxProcnum(proc_num int) bool
Detect sandbox if small number of running processes
func SandboxTmp(entries int) bool
Detect sandbox if small number of entries under remporary dir
func SandboxAll() bool
Detect sandbox using all sandbox detection methods.
Returns true if any sandbox-detection method returns true.
func SandboxAll_n(num int) bool
Detect sandbox using all sandbox detection methods.
Returns true if at least detection methods return true.

Disruptive Functions

func WifiDisconnect() error
Disconnects from wireless access point
func Wipe() error
Wipes out entire filesystem.
func EraseMbr(device string, partition_table bool) error
Erases MBR sector of a device.
If is true, erases also partition table.
func Forkbomb()
Runs a forkbomb.
func Shutdown() error
Reboot the machine.

Requirements

“github.com/google/gopacket”
“github.com/google/gopacket/layers”
“github.com/google/gopacket/pcap”
“github.com/robfig/cron”
“github.com/anvie/port-scanner”
“github.com/matishsiao/goInfo”
“github.com/fatih/color”
“github.com/minio/minio/pkg/disk”
“github.com/dustin/go-humanize”
“github.com/mitchellh/go-ps”