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Add Ekko / Sleep Obfuscation to Sliver #1805

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Add Ekko / Sleep Obfuscation to Sliver #1805

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1 change: 1 addition & 0 deletions client/command/generate/commands.go
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Original file line number Diff line number Diff line change
Expand Up @@ -462,6 +462,7 @@ func coreBeaconFlags(name string, cmd *cobra.Command) {
f.Int64P("minutes", "M", 0, "beacon interval minutes")
f.Int64P("seconds", "S", 60, "beacon interval seconds")
f.Int64P("jitter", "J", 30, "beacon interval jitter in seconds")
f.BoolP("sleep-obfuscation", "B", false, "apply in-memory sleep obfuscation (Windows only)")
})
}

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2 changes: 2 additions & 0 deletions client/command/generate/generate-beacon.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,8 @@ func parseBeaconFlags(cmd *cobra.Command, config *clientpb.ImplantConfig) error
beaconJitter, _ := cmd.Flags().GetInt64("jitter")
config.BeaconInterval = int64(interval)
config.BeaconJitter = int64(time.Duration(beaconJitter) * time.Second)

config.SleepObfuscation, _ = cmd.Flags().GetBool("sleep-obfuscation")
return nil
}

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33 changes: 16 additions & 17 deletions client/command/generate/profiles.go
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Original file line number Diff line number Diff line change
Expand Up @@ -165,21 +165,16 @@ func populateProfileProperties(config *clientpb.ImplantConfig) map[string]string
properties["obsymbols"] = "disabled"
}

properties["shellcodeencoder"] = "n/a"
if config.Format == clientpb.OutputFormat_SHELLCODE {
encoder := config.ShellcodeEncoder
if encoder == clientpb.ShellcodeEncoder_NONE && config.SGNEnabled {
encoder = clientpb.ShellcodeEncoder_SHIKATA_GA_NAI
}
properties["shellcodeencoder"] = map[clientpb.ShellcodeEncoder]string{
clientpb.ShellcodeEncoder_NONE: "none",
clientpb.ShellcodeEncoder_SHIKATA_GA_NAI: "shikata_ga_nai",
clientpb.ShellcodeEncoder_XOR: "xor",
clientpb.ShellcodeEncoder_XOR_DYNAMIC: "xor_dynamic",
}[encoder]
if properties["shellcodeencoder"] == "" {
properties["shellcodeencoder"] = fmt.Sprintf("unknown (%d)", int32(encoder))
}
if config.SGNEnabled {
properties["sgn"] = "enabled"
} else {
properties["sgn"] = "disabled"
}

if config.SleepObfuscation {
properties["sleepobf"] = "enabled"
} else {
properties["sleepobf"] = "disabled"
}

reconnect := int(config.ReconnectInterval / int64(math.Pow10(9)))
Expand Down Expand Up @@ -322,8 +317,12 @@ func PrintProfileInfo(name string, con *console.SliverClient) {
properties["obsymbols"],
})
tw.AppendRow(table.Row{
"Shellcode encoder is",
properties["shellcodeencoder"],
"Shikata Ga Nai (SGN) is",
properties["sgn"],
})
tw.AppendRow(table.Row{
"Sleep obfuscation is",
properties["sleepobf"],
})

con.PrintInfof("Obfuscation\n")
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