MalwareUsed by 1 actor

BYEBY

For your environment

Hunt this family in your stack

Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

View more details

Vicious Panda

We observed an attack on the Royal Road by Vicious Panda in March 2020. It has been reported to execute malware similar to Enfal and BYEBY.

via nao sec blognao-sec.org

MITRE ATT&CK

Techniques & procedures

9 distinct techniques documented for this family, organized by ATT&CK tactic.

Initial Access

1 technique

T1566PhishingEvidence1

Palo Alto Networks Unit 42 has identified a series of phishing emails containing updated versions of the previously discussed CMSTAR malware family targeting various government entities in the country of Belarus.

Execution

2 techniques

T1059Command and Scripting InterpreterEvidence1

Both malware families acted as backdoors, allowing the attackers to execute commands on the victim machine, as well as a series of other functions.

T1059.003Windows Command ShellEvidence1

A mapping of commands and their descriptions has been provided: ... U1RBUlRD Start an interactive shell on the victim machine. Q09NTUFO Execute a command in the interactive shell

Discovery

3 techniques

T1033System Owner/User DiscoveryEvidence1

After the initial connection is established, BYEBY will collect the following system information and upload it to the remote C2: Hostname IP Address

T1082System Information DiscoveryEvidence1

The malware continues to collect the following information from the victim computer: Computer name ... Microsoft Windows version information

T1083File and Directory DiscoveryEvidence1

A mapping of commands and their descriptions has been provided: ... TElTVCBE List drives on the victim machine.

Command and Control

2 techniques

T1071Application Layer ProtocolEvidence1

BYEBY uses TLS for network communication, connecting to the following host on port 443

T1105Ingress Tool TransferEvidence1

An example of CMSTAR downloading its payload may be found below: Figure 10 Example HTTP download by CMSTAR

Exfiltration

1 technique

T1041Exfiltration Over C2 ChannelEvidence1

After the initial connection is established, BYEBY will collect the following system information and upload it to the remote C2

INDICATORS OF COMPROMISE

IOCs tracked for this family

2 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.

View more in app

Network

1 tracked

IPs, domains, and DNS infrastructure linked to this family.

Hashes

1 tracked

File hashes (MD5, SHA-1, SHA-256) from samples and reports.

TypeValueLatest sighting

domain●●●●●●●●●●●●View more in app9 years ago

hash.sha256●●●●●●●●●●●●View more in app9 years ago

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

nao sec blogNews

Jan 4, 2021

Royal Road! Re:Dive | @nao_sec

A malware family referenced as similar to payloads executed by Vicious Panda in Royal Road-related attacks.

paloalto researchcenter historicNews

Sep 28, 2017

Threat Actors Target Government of Belarus Using CMSTAR Trojan

BYEBY is a previously unknown DLL backdoor associated with additional CMSTAR samples. It checks whether it is running under svchost.exe or rundll32.exe, can install itself as the 'VideoSrv' service, logs to a temp file, communicates with its C2 over TLS on port 443, uploads host information, and supports commands for authentication, shell access, command execution, drive listing, file transfer, and process execution.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets match these IOCs, which detections are missing, which campaigns to expect next, and what to do in the next 30 minutes.

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IOC matching2

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping9

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.

Back to malware

MalwareUsed by 1 actor

BYEBY

For your environment

Hunt this family in your stack

Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

Start free trial

THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

View more details

Vicious Panda

We observed an attack on the Royal Road by Vicious Panda in March 2020. It has been reported to execute malware similar to Enfal and BYEBY.

via nao sec blognao-sec.org

MITRE ATT&CK

Techniques & procedures

9 distinct techniques documented for this family, organized by ATT&CK tactic.

Initial Access

1 technique

T1566PhishingEvidence1

Execution

2 techniques

T1059Command and Scripting InterpreterEvidence1

Both malware families acted as backdoors, allowing the attackers to execute commands on the victim machine, as well as a series of other functions.

T1059.003Windows Command ShellEvidence1

A mapping of commands and their descriptions has been provided: ... U1RBUlRD Start an interactive shell on the victim machine. Q09NTUFO Execute a command in the interactive shell

Discovery

3 techniques

T1033System Owner/User DiscoveryEvidence1

After the initial connection is established, BYEBY will collect the following system information and upload it to the remote C2: Hostname IP Address

T1082System Information DiscoveryEvidence1

The malware continues to collect the following information from the victim computer: Computer name ... Microsoft Windows version information

T1083File and Directory DiscoveryEvidence1

A mapping of commands and their descriptions has been provided: ... TElTVCBE List drives on the victim machine.

Command and Control

2 techniques

T1071Application Layer ProtocolEvidence1

BYEBY uses TLS for network communication, connecting to the following host on port 443

T1105Ingress Tool TransferEvidence1

An example of CMSTAR downloading its payload may be found below: Figure 10 Example HTTP download by CMSTAR

Exfiltration

1 technique

T1041Exfiltration Over C2 ChannelEvidence1

After the initial connection is established, BYEBY will collect the following system information and upload it to the remote C2

INDICATORS OF COMPROMISE

IOCs tracked for this family

2 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.

View more in app

Network

1 tracked

IPs, domains, and DNS infrastructure linked to this family.

Hashes

1 tracked

File hashes (MD5, SHA-1, SHA-256) from samples and reports.

TypeValueLatest sighting

domain●●●●●●●●●●●●View more in app9 years ago

hash.sha256●●●●●●●●●●●●View more in app9 years ago

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

nao sec blogNews

Jan 4, 2021

Royal Road! Re:Dive | @nao_sec

A malware family referenced as similar to payloads executed by Vicious Panda in Royal Road-related attacks.

paloalto researchcenter historicNews

Sep 28, 2017

Threat Actors Target Government of Belarus Using CMSTAR Trojan

What this page doesn’t show

The version that knows your environment.

Start free trial

IOC matching2

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution1

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping9

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.