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Share:
Cybersecurity Advisory
#STOPRANSOMWARE: VICE SOCIETY
Last Revised
September 08, 2022
Alert Code
AA22-249A
SUMMARY
Actions to take today to mitigate cyber threats from ransomware:
• Prioritize and remediate known exploited vulnerabilities.
• Train users to recognize and report phishing attempts.
• Enable and enforce multifactor authentication.
Note: This joint Cybersecurity Advisory (CSA) is part of an ongoing
#StopRansomware effort to publish advisories for network defenders that detail
various ransomware variants and ransomware threat actors. These #StopRansomware
advisories include recently and historically observed tactics, techniques, and
procedures (TTPs) and indicators of compromise (IOCs) to help organizations
protect against ransomware. Visit stopransomware.gov to see all #StopRansomware
advisories and to learn more about other ransomware threats and no-cost
resources.
The Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure
Security Agency (CISA), and the Multi-State Information Sharing and Analysis
Center (MS-ISAC) are releasing this joint CSA to disseminate IOCs and TTPs
associated with Vice Society actors identified through FBI investigations as
recently as September 2022. The FBI, CISA, and the MS-ISAC have recently
observed Vice Society actors disproportionately targeting the education sector
with ransomware attacks.
Over the past several years, the education sector, especially kindergarten
through twelfth grade (K-12) institutions, have been a frequent target of
ransomware attacks. Impacts from these attacks have ranged from restricted
access to networks and data, delayed exams, canceled school days, and
unauthorized access to and theft of personal information regarding students and
staff. The FBI, CISA, and the MS-ISAC anticipate attacks may increase as the
2022/2023 school year begins and criminal ransomware groups perceive
opportunities for successful attacks. School districts with limited
cybersecurity capabilities and constrained resources are often the most
vulnerable; however, the opportunistic targeting often seen with cyber criminals
can still put school districts with robust cybersecurity programs at risk. K-12
institutions may be seen as particularly lucrative targets due to the amount of
sensitive student data accessible through school systems or their managed
service providers.
The FBI, CISA, and the MS-ISAC encourage organizations to implement the
recommendations in the Mitigations section of this CSA to reduce the likelihood
and impact of ransomware incidents.
Download the PDF version of this report: pdf, 521 KB
Download the IOCs: .stix 31 kb
TECHNICAL DETAILS
Note: This advisory uses the MITRE ATT&CK® for Enterprise framework, version 11.
See MITRE ATT&CK for Enterprise(link is external) for all referenced tactics and
techniques.
Vice Society is an intrusion, exfiltration, and extortion hacking group that
first appeared in summer 2021. Vice Society actors do not use a ransomware
variant of unique origin. Instead, the actors have deployed versions of Hello
Kitty/Five Hands and Zeppelin ransomware, but may deploy other variants in the
future.
Vice Society actors likely obtain initial network access through compromised
credentials by exploiting internet-facing applications [T1190(link is
external)]. Prior to deploying ransomware, the actors spend time exploring the
network, identifying opportunities to increase accesses, and exfiltrating data
[TA0010(link is external)] for double extortion--a tactic whereby actors
threaten to publicly release sensitive data unless a victim pays a ransom. Vice
Society actors have been observed using a variety of tools, including SystemBC,
PowerShell Empire, and Cobalt Strike to move laterally. They have also used
“living off the land” techniques targeting the legitimate Windows Management
Instrumentation (WMI) service [T1047(link is external)] and tainting shared
content [T1080(link is external)].
Vice Society actors have been observed exploiting the PrintNightmare
vulnerability (CVE-2021-1675 and CVE-2021-34527 ) to escalate privileges
[T1068(link is external)]. To maintain persistence, the criminal actors have
been observed leveraging scheduled tasks [T1053(link is external)], creating
undocumented autostart Registry keys [T1547.001(link is external)], and pointing
legitimate services to their custom malicious dynamic link libraries (DLLs)
through a tactic known as DLL side-loading [T1574.002(link is external)]. Vice
Society actors attempt to evade detection through masquerading their malware and
tools as legitimate files [T1036(link is external)], using process injection
[T1055(link is external)], and likely use evasion techniques to defeat automated
dynamic analysis [T1497(link is external)]. Vice Society actors have been
observed escalating privileges, then gaining access to domain administrator
accounts, and running scripts to change the passwords of victims’ network
accounts to prevent the victim from remediating.
INDICATORS OF COMPROMISE (IOCS)
Email Addresses
v-society.official@onionmail[.]org
ViceSociety@onionmail[.]org
OnionMail email accounts in the format of [First Name][Last
Name]@onionmail[.]org
TOR Address
http://vsociethok6sbprvevl4dlwbqrzyhxcxaqpvcqt5belwvsuxaxsutyad[.]onion
IP Addresses for C2
Confidence Level
5.255.99[.]59
High Confidence
5.161.136[.]176
Medium Confidence
198.252.98[.]184
Medium Confidence
194.34.246[.]90
Low Confidence
See Table 1 for file hashes obtained from FBI incident response investigations
in September 2022.
Table 1: File Hashes as of September 2022
MD5
SHA1
fb91e471cfa246beb9618e1689f1ae1d
a0ee0761602470e24bcea5f403e8d1e8bfa29832
3122ea585623531df2e860e7d0df0f25cce39b21
41dc0ba220f30c70aea019de214eccd650bc6f37
c9c2b6a5b930392b98f132f5395d54947391cb79
MITRE ATT&CK TECHNIQUES
Vice Society actors have used ATT&CK techniques, similar to Zeppelin techniques,
listed in Table 2.
Table 2: Vice Society Actors ATT&CK Techniques for Enterprise
Initial Access
Technique Title
ID
Use
Exploit Public-Facing Application
T1190(link is external)
Vice Society actors exploit vulnerabilities in an internet-facing systems to
gain access to victims’ networks.
Valid Accounts
T1078(link is external)
Vice Society actors obtain initial network access through compromised valid
accounts.
Execution
Technique Title
ID
Use
Windows Management Instrumentation (WMI)
T1047(link is external)
Vice Society actors leverage WMI as a means of “living off the land” to execute
malicious commands. WMI is a native Windows administration feature.
Scheduled Task/Job
T1053(link is external)
Vice Society have used malicious files that create component task schedule
objects, which are often mean to register a specific task to autostart on system
boot. This facilitates recurring execution of their code.
Persistence
Technique Title
ID
Use
Modify System Process
T1543.003(link is external)
Vice Society actors encrypt Windows Operating functions to preserve compromised
system functions.
Registry Run Keys/Startup Folder
T1547.001(link is external)
Vice Society actors have employed malicious files that create an undocumented
autostart Registry key to maintain persistence after boot/reboot.
DLL Side-Loading
T1574.002(link is external)
Vice Society actors may directly side-load their payloads by planting their own
DLL then invoking a legitimate application that executes the payload within that
DLL. This serves as both a persistence mechanism and a means to masquerade
actions under legitimate programs.
Privilege Escalation
Technique Title
ID
Use
Exploitation for Privilege Escalation
T1068(link is external)
Vice Society actors have been observed exploiting PrintNightmare vulnerability
(CVE-2021-1675 and CVE-2021-34527) to escalate privileges.
Defense Evasion
Technique Title
ID
Use
Masquerading
T1036(link is external)
Vice Society actors may attempt to manipulate features of the files they drop in
a victim’s environment to mask the files or make the files appear legitimate.
Process Injection
T1055(link is external)
Vice Society artifacts have been analyzed to reveal the ability to inject code
into legitimate processes for evading process-based defenses. This tactic has
other potential impacts, including the ability to escalate privileges or gain
additional accesses.
Sandbox Evasion
T1497(link is external)
Vice Society actors may have included sleep techniques in their files to hinder
common reverse engineering or dynamic analysis.
Lateral Movement
Technique Title
ID
Use
Taint Shared Content
T1080(link is external)
Vice Society actors may deliver payloads to remote systems by adding content to
shared storage locations such as network drives.
Exfiltration
Technique Title
ID
Use
Exfiltration
TA0010(link is external)
Vice Society actors are known for double extortion, which is a second attempt to
force a victim to pay by threatening to expose sensitive information if the
victim does not pay a ransom.
Impact
Technique Title
ID
Use
Data Encrypted for Impact
T1486(link is external)
Vice Society actors have encrypted data on target systems or on large numbers of
systems in a network to interrupt availability to system and network resources.
Account Access Removal
T1531(link is external)
Vice Society actors run a script to change passwords of victims’ email accounts.
MITIGATIONS
The FBI and CISA recommend organizations, particularly the education sector,
establish and maintain strong liaison relationships with the FBI Field Office in
their region and their regional CISA Cybersecurity Advisor. The location and
contact information for FBI Field Offices and CISA Regional Offices can be
located at www.fbi.gov/contact-us/field-offices and www.cisa.gov/cisa-regions,
respectively. Through these partnerships, the FBI and CISA can assist with
identifying vulnerabilities to academia and mitigating potential threat
activity. The FBI and CISA further recommend that academic entities review and,
if needed, update incident response and communication plans that list actions an
organization will take if impacted by a cyber incident.
The FBI, CISA, and the MS-ISAC recommend network defenders apply the following
mitigations to limit potential adversarial use of common system and network
discovery techniques and to reduce the risk of compromise by Vice Society
actors:
Preparing for Cyber Incidents
* Maintain offline backups of data, and regularly maintain backup and
restoration. By instituting this practice, the organization ensures they
will not be severely interrupted, and/or only have irretrievable data.
* Ensure all backup data is encrypted, immutable (i.e., cannot be altered or
deleted), and covers the entire organization’s data infrastructure. Ensure
your backup data is not already infected.
* Review the security posture of third-party vendors and those interconnected
with your organization. Ensure all connections between third-party vendors
and outside software or hardware are monitored and reviewed for suspicious
activity.
* Implement listing policies for applications and remote access that only allow
systems to execute known and permitted programs under an established security
policy.
* Document and monitor external remote connections. Organizations should
document approved solutions for remote management and maintenance, and
immediately investigate if an unapproved solution is installed on a
workstation.
* Implement a recovery plan to maintain and retain multiple copies of sensitive
or proprietary data and servers in a physically separate, segmented, and
secure location (i.e., hard drive, storage device, the cloud).
Identity and Access Management
* Require all accounts with password logins (e.g., service account, admin
accounts, and domain admin accounts) to comply with National Institute of
Standards and Technology (NIST) standards for developing and managing
password policies.
* Use longer passwords consisting of at least 8 characters and no more than
64 characters in length;
* Store passwords in hashed format using industry-recognized password
managers;
* Add password user “salts” to shared login credentials;
* Avoid reusing passwords;
* Implement multiple failed login attempt account lockouts;
* Disable password “hints”;
* Refrain from requiring password changes more frequently than once per year
unless a password is known or suspected to be compromised.
Note: NIST guidance suggests favoring longer passwords instead of requiring
regular and frequent password resets. Frequent password resets are more
likely to result in users developing password “patterns” cyber criminals
can easily decipher.
* Require administrator credentials to install software.
* Require phishing-resistant multifactor authentication for all services to the
extent possible, particularly for webmail, virtual private networks, and
accounts that access critical systems.
* Review domain controllers, servers, workstations, and active directories for
new and/or unrecognized accounts.
* Audit user accounts with administrative privileges and configure access
controls according to the principle of least privilege.
* Implement time-based access for accounts set at the admin level and higher.
For example, the Just-in-Time (JIT) access method provisions privileged
access when needed and can support enforcement of the principle of least
privilege (as well as the Zero Trust model). This is a process where a
network-wide policy is set in place to automatically disable admin accounts
at the Active Directory level when the account is not in direct need.
Individual users may submit their requests through an automated process that
grants them access to a specified system for a set timeframe when they need
to support the completion of a certain task.
Protective Controls and Architecture
* Segment networks to prevent the spread of ransomware. Network segmentation
can help prevent the spread of ransomware by controlling traffic flows
between—and access to—various subnetworks and by restricting adversary
lateral movement.
* Identify, detect, and investigate abnormal activity and potential traversal
of the indicated ransomware with a networking monitoring tool. To aid in
detecting the ransomware, implement a tool that logs and reports all network
traffic, including lateral movement activity on a network. Endpoint detection
and response (EDR) tools are particularly useful for detecting lateral
connections as they have insight into common and uncommon network connections
for each host.
* Install, regularly update, and enable real time detection for antivirus
software on all hosts.
* Secure and closely monitor remote desktop protocol (RDP) use.
* Limit access to resources over internal networks, especially by restricting
RDP and using virtual desktop infrastructure. If RDP is deemed
operationally necessary, restrict the originating sources and require MFA
to mitigate credential theft and reuse. If RDP must be available
externally, use a VPN, virtual desktop infrastructure, or other means to
authenticate and secure the connection before allowing RDP to connect to
internal devices. Monitor remote access/RDP logs, enforce account lockouts
after a specified number of attempts to block brute force campaigns, log
RDP login attempts, and disable unused remote access/RDP ports.
Vulnerability and Configuration Management
* Keep all operating systems, software, and firmware up to date. Timely
patching is one of the most efficient and cost-effective steps an
organization can take to minimize its exposure to cybersecurity threats.
Organizations should prioritize patching of vulnerabilities on CISA’s Known
Exploited Vulnerabilities catalog.
* Disable unused ports.
* Consider adding an email banner to emails received from outside your
organization.
* Disable hyperlinks in received emails.
* Disable command-line and scripting activities and permissions. Privilege
escalation and lateral movement often depend on software utilities running
from the command line. If threat actors are not able to run these tools, they
will have difficulty escalating privileges and/or moving laterally.
* Ensure devices are properly configured and that security features are
enabled.
* Disable ports and protocols that are not being used for a business purpose
(e.g., RDP Transmission Control Protocol Port 3389).
* Restrict Server Message Block (SMB) Protocol within the network to only
access servers that are necessary, and remove or disable outdated versions of
SMB (i.e., SMB version 1). Threat actors use SMB to propagate malware across
organizations.
REFERENCES
* Stopransomware.gov is a whole-of-government approach that gives one central
location for ransomware resources and alerts.
* Resource to mitigate a ransomware attack: CISA-Multi-State Information
Sharing and Analysis Center (MS-ISAC) Joint Ransomware Guide.
* No-cost cyber hygiene services: Cyber Hygiene Services and Ransomware
Readiness Assessment(link is external).
REPORTING
The FBI is seeking any information that can be shared, to include boundary logs
showing communication to and from foreign IP addresses, a sample ransom note,
communications with Vice Society actors, Bitcoin wallet information, decryptor
files, and/or a benign sample of an encrypted file.
The FBI, CISA, and the MS-ISAC strongly discourage paying ransom as payment does
not guarantee victim files will be recovered. Furthermore, payment may also
embolden adversaries to target additional organizations, encourage other
criminal actors to engage in the distribution of ransomware, and/or fund illicit
activities. Regardless of whether you or your organization have decided to pay
the ransom, the FBI and CISA urge you to promptly report ransomware incidents to
a local FBI Field Office, or to CISA at report@cisa.gov(link sends email) or
(888) 282-0870. SLTT government entities can also report to the MS-ISAC
(SOC@cisecurity.org(link sends email) or 866-787-4722).
DISCLAIMER
The information in this report is being provided “as is” for informational
purposes only. The FBI, CISA, and the MS-ISAC do not endorse any commercial
product or service, including any subjects of analysis. Any reference to
specific commercial products, processes, or services by service mark, trademark,
manufacturer, or otherwise, does not constitute or imply endorsement,
recommendation, or favoring by the FBI, CISA, or the MS-ISAC.
REVISIONS
September 6, 2022: Initial Version
PLEASE SHARE YOUR THOUGHTS
We recently updated our anonymous product survey; we’d welcome your feedback.
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