Commonly Used Port
**This technique has been deprecated. Please use Non-Standard Port where appropriate.** Adversaries may communicate over a commonly used port to bypass firewalls or network detection systems and to blend with normal network activity to avoid more detailed inspection. They may use commonly open ports such as * TCP:80 (HTTP) * TCP:443 (HTTPS) * TCP:25 (SMTP) * TCP/UDP:53 (DNS) They may use the protocol associated with the port or a completely different protocol. For connections that occur internally within an enclave (such as those between a proxy or pivot node and other nodes), examples of common ports are * TCP/UDP:135 (RPC) * TCP/UDP:22 (SSH) * TCP/UDP:3389 (RDP)
Примеры процедур |
|
Название | Описание |
---|---|
HTTPBrowser |
One HTTPBrowser variant connected to its C2 server over port 8080.(Citation: ZScaler Hacking Team) |
ftp |
FTP operates over ports 21 and 20.(Citation: Wikipedia FTP) |
Briba |
Briba connects to external C2 infrastructure over port 443.(Citation: Symantec Briba May 2012) |
Comnie |
Comnie uses Port Numbers 80, 8080, 8000, and 443 for communication to the C2 servers.(Citation: Palo Alto Comnie) |
S-Type |
S-Type uses ports 80, 443, and 8080 for C2.(Citation: Cylance Dust Storm) |
Night Dragon |
Night Dragon has used ports 25 and 80 for C2 communications.(Citation: McAfee Night Dragon) |
APT28 |
APT28 has used port 443 for C2.(Citation: Microsoft STRONTIUM Aug 2019) |
HAWKBALL |
HAWKBALL has sent HTTP GET requests over port 443 for C2.(Citation: FireEye HAWKBALL Jun 2019) |
Linux Rabbit |
Linux Rabbit checks to see if an SSH server is listening on port 22.(Citation: Anomali Linux Rabbit 2018) |
Pasam |
Pasam connects to external C2 infrastructure and opens a backdoor over port 443.(Citation: Symantec Pasam May 2012) |
APT19 |
APT19 used TCP port 80 for C2.(Citation: FireEye APT19) |
TEMP.Veles |
TEMP.Veles has used port 443 for C2.(Citation: FireEye TRITON 2019) |
ZxShell |
ZxShell uses common ports such as 80 and 443 for C2.(Citation: Talos ZxShell Oct 2014 ) |
Carbon |
Carbon uses port 80 for C2 communications.(Citation: ESET Carbon Mar 2017) |
UBoatRAT |
UBoatRAT uses ports 80 and 443 for C2 communications.(Citation: PaloAlto UBoatRAT Nov 2017) |
MoonWind |
MoonWind communicates over ports 80, 443, 53, and 8080 via raw sockets instead of the protocols usually associated with the ports.(Citation: Palo Alto MoonWind March 2017) |
Volgmer |
Some Volgmer variants use ports 8080 and 8000 for C2.(Citation: US-CERT Volgmer Nov 2017)(Citation: US-CERT Volgmer 2 Nov 2017)(Citation: Symantec Volgmer Aug 2014) |
OceanSalt |
OceanSalt uses Port Number 8080 for C2.(Citation: McAfee Oceansalt Oct 2018) |
FlawedAmmyy |
FlawedAmmyy has used port 443 for C2.(Citation: Proofpoint TA505 Mar 2018) |
Proxysvc |
Proxysvc uses port 443 for the control server communications.(Citation: McAfee GhostSecret) |
RedLeaves |
RedLeaves uses a specific port of 443 and can also use ports 53 and 80 for C2. One RedLeaves variant uses HTTP over port 443 to connect to its C2 server.(Citation: PWC Cloud Hopper Technical Annex April 2017)(Citation: Accenture Hogfish April 2018) |
HOPLIGHT |
HOPLIGHT has connected outbound over TCP port 443. (Citation: US-CERT HOPLIGHT Apr 2019) |
Empire |
Empire can conduct command and control over commonly used ports like 80 and 443.(Citation: Github PowerShell Empire) |
Duqu |
Duqu uses a custom command and control protocol that communicates over commonly used ports, and is frequently encapsulated by application layer protocols.(Citation: Symantec W32.Duqu) |
Calisto |
Calisto attempted to contact the C2 server over TCP using port 80.(Citation: Securelist Calisto July 2018) |
APT29 |
APT29 has used Port Number 443 for C2.(Citation: FireEye APT29 Nov 2018) |
FlawedGrace |
FlawedGrace has used port 443 for C2 communications.(Citation: Proofpoint TA505 Jan 2019) |
OilRig |
OilRig has used port 80 to call back to the C2 server.(Citation: FireEye APT34 July 2019) |
Hi-Zor |
Hi-Zor communicates with its C2 server over port 443.(Citation: Fidelis INOCNATION) |
ServHelper |
ServHelper has used port 80 and 443 for C2.(Citation: Proofpoint TA505 Jan 2019) |
Ixeshe |
Ixeshe has used TCP port 443 for C2.(Citation: Trend Micro IXESHE 2012) |
Naid |
Naid connects to external C2 infrastructure over port 443.(Citation: Symantec Naid June 2012) |
APT18 |
APT18 uses port 80 for C2 communications.(Citation: PaloAlto DNS Requests May 2016)(Citation: Anomali Evasive Maneuvers July 2015) |
Wiarp |
Wiarp connects to external C2 infrastructure over the HTTP port.(Citation: Symantec Wiarp May 2012) |
Emotet |
Emotet has used ports 20, 22, 80, 443, 8080, and 8443.(Citation: CIS Emotet Apr 2017)(Citation: Talos Emotet Jan 2019)(Citation: Trend Micro Emotet Jan 2019)(Citation: Carbon Black Emotet Apr 2019) |
POWERTON |
POWERTON has used port 443 for C2 traffic.(Citation: FireEye APT33 Guardrail) |
Misdat |
Misdat network traffic communicates over common ports like 80, 443, or 1433.(Citation: Cylance Dust Storm) |
Mivast |
Mivast communicates over port 80 for C2.(Citation: Symantec Backdoor.Mivast) |
Lazarus Group |
Some Lazarus Group malware uses a list of ordered port numbers to choose a port for C2 traffic, which includes commonly used ports such as 443, 53, 80, 25, and 8080.(Citation: Novetta Blockbuster)(Citation: Novetta Blockbuster RATs) |
Cobalt Strike |
Cobalt Strike uses a custom command and control protocol that communicates over commonly used ports. The C2 protocol is encapsulated in common application layer protocols.(Citation: cobaltstrike manual) |
AuditCred |
AuditCred has used Port Number 443 for C2 communications.(Citation: TrendMicro Lazarus Nov 2018) |
Bisonal |
Bisonal uses 443 for C2 communications.(Citation: Unit 42 Bisonal July 2018) |
KEYMARBLE |
KEYMARBLE uses port 443 for C2.(Citation: US-CERT KEYMARBLE Aug 2018) |
InvisiMole |
InvisiMole uses port 80 for C2.(Citation: ESET InvisiMole June 2018) |
POWERSTATS |
POWERSTATS has used port 80 for C2.(Citation: Unit 42 MuddyWater Nov 2017) |
FIN8 |
FIN8 has tunneled RDP backdoors over port 443.(Citation: FireEye Know Your Enemy FIN8 Aug 2016) |
EvilGrab |
EvilGrab uses port 8080 for C2.(Citation: PWC Cloud Hopper Technical Annex April 2017) |
Mis-Type |
Mis-Type communicates over common ports such as TCP 80, 443, and 25.(Citation: Cylance Dust Storm) |
TYPEFRAME |
TYPEFRAME variants can use ports 443, 8443, and 8080 for communications.(Citation: US-CERT TYPEFRAME June 2018) |
Dragonfly 2.0 |
Dragonfly 2.0 used SMB over ports 445 or 139 for C2. The group also established encrypted connections over port 443.(Citation: US-CERT TA18-074A)(Citation: US-CERT APT Energy Oct 2017) |
PowerDuke |
PowerDuke connects over 443 for C2.(Citation: Volexity PowerDuke November 2016) |
BADCALL |
BADCALL uses port 8000 and 443 for C2.(Citation: US-CERT BADCALL) |
APT3 |
APT3 uses commonly used ports (like HTTPS/443) for command and control.(Citation: evolution of pirpi) |
Threat Group-3390 |
C2 traffic for most Threat Group-3390 tools occurs over Port Numbers 53, 80, and 443.(Citation: Dell TG-3390) |
MirageFox |
MirageFox uses port 80 for C2.(Citation: APT15 Intezer June 2018) |
BBSRAT |
BBSRAT uses HTTP TCP port 80 and HTTPS TCP port 443 for communications.(Citation: Palo Alto Networks BBSRAT) |
ELMER |
ELMER uses HTTP over port 443 for command and control.(Citation: FireEye EPS Awakens Part 2) |
FIN7 |
FIN7 has used ports 53, 80, 443, and 8080 for C2.(Citation: FireEye FIN7 Aug 2018) |
Magic Hound |
Magic Hound malware has communicated with C2 servers over port 6667 (for IRC) and port 8080.(Citation: Unit 42 Magic Hound Feb 2017) |
Derusbi |
Derusbi beacons to destination port 443.(Citation: Fidelis Turbo) |
PlugX |
PlugX has beaconed to its C2 over port 443.(Citation: PWC Cloud Hopper Technical Annex April 2017)(Citation: CIRCL PlugX March 2013) |
FELIXROOT |
FELIXROOT uses Port Numbers 443, 8443, and 8080 for C2 communications.(Citation: FireEye FELIXROOT July 2018)(Citation: ESET GreyEnergy Oct 2018) |
APT37 |
APT37 has used port 8080 for C2.(Citation: Securelist ScarCruft Jun 2016) |
RATANKBA |
RATANKBA uses port 443 for C2.(Citation: RATANKBA) |
HARDRAIN |
HARDRAIN binds and listens on port 443.(Citation: US-CERT HARDRAIN March 2018) |
ADVSTORESHELL |
A variant of ADVSTORESHELL attempts communication to the C2 server over HTTP on port 443.(Citation: Bitdefender APT28 Dec 2015) |
Nidiran |
Nidiran communicates with its C2 domain over ports 443 and 8443.(Citation: Symantec Suckfly May 2016) |
Cardinal RAT |
Cardinal RAT is downloaded using HTTP over port 443.(Citation: PaloAlto CardinalRat Apr 2017) |
TrickBot |
TrickBot uses port 443 for C2 communications.(Citation: S2 Grupo TrickBot June 2017)(Citation: Trend Micro Totbrick Oct 2016) |
Cobalt Strike |
Cobalt Strike uses a custom command and control protocol that communicates over commonly used ports. The C2 protocol is encapsulated in common application layer protocols.(Citation: cobaltstrike manual) |
BadPatch |
BadPatch uses port 26 for C2 communications.(Citation: Unit 42 BadPatch Oct 2017) |
Fysbis |
Fysbis has used port 80 for C2.(Citation: Fysbis Palo Alto Analysis) |
KeyBoy |
KeyBoy calls back to the C2 server over ports 53, 80, and 443.(Citation: PWC KeyBoys Feb 2017)(Citation: Rapid7 KeyBoy Jun 2013) |
Carbanak |
Carbanak uses Port Numbers 443 and 80 for the C2 server.(Citation: FireEye CARBANAK June 2017) |
LOWBALL |
LOWBALL command and control occurs via HTTPS over port 443.(Citation: FireEye admin@338) |
RIPTIDE |
RIPTIDE is a RAT that communicates with HTTP.(Citation: Moran 2014) |
Контрмеры |
|
Контрмера | Описание |
---|---|
Network Segmentation |
Architect sections of the network to isolate critical systems, functions, or resources. Use physical and logical segmentation to prevent access to potentially sensitive systems and information. Use a DMZ to contain any internet-facing services that should not be exposed from the internal network. Configure separate virtual private cloud (VPC) instances to isolate critical cloud systems. |
Network Intrusion Prevention |
Use intrusion detection signatures to block traffic at network boundaries. |
Commonly Used Port Mitigation |
Network intrusion detection and prevention systems that use network signatures to identify traffic for specific adversary malware can be used to mitigate activity at the network level. Signatures are often for unique indicators within protocols and may be based on the specific protocol used by a particular adversary or tool, and will likely be different across various malware families and versions. Adversaries will likely change tool C2 signatures over time or construct protocols in such a way as to avoid detection by common defensive tools. (Citation: University of Birmingham C2) |
Обнаружение
Analyze network data for uncommon data flows (e.g., a client sending significantly more data than it receives from a server). Processes utilizing the network that do not normally have network communication or have never been seen before are suspicious. Analyze packet contents to detect communications that do not follow the expected protocol behavior for the port that is being used. (Citation: University of Birmingham C2)
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