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MITRE ATT&CK® Technique

T1021.002: SMB/Windows Admin Shares

Adversaries may use Valid Accounts to interact with a remote network share using Server Message Block (SMB). The adversary may then perform actions as the logged-on user.

SMB is a file, printer, and serial port sharing protocol for Windows machines on the same network or domain. Adversaries may use SMB to interact with file shares, allowing them to move laterally throughout a network. Linux and macOS implementations of SMB typically use Samba.

Windows systems have hidden network shares that are accessible only to administrators and provide the ability for remote file copy and other administrative functions. Example network shares include `C$`, `ADMIN$`, and `IPC$`. Adversaries may use this technique in conjunction with administrator-level Valid Accounts to remotely access a networked system over SMB,[1] to interact with systems using remote procedure calls (RPCs),[2] transfer files, and run transferred binaries through remote Execution. Example execution techniques that rely on authenticated sessions over SMB/RPC are Scheduled Task/Job, Service Execution, and Windows Management Instrumentation. Adversaries can also use NTLM hashes to access administrator shares on systems with Pass the Hash and certain configuration and patch levels.[3]

EnterpriseT1021.002Sub-techniqueObject v1.3 Modified
Glexia's Take

Analyst context for executives and security teams

Analyst confidence High

SMB/Windows Admin Shares matters because it turns valid Windows administrator credentials into a practical path for lateral movement. If an adversary can authenticate to hidden shares such as C$, ADMIN$, or IPC$, they may copy files, use RPC, and support follow-on remote execution through mechanisms such as scheduled tasks, services, or WMI. For leaders, this is primarily an identity, segmentation, and monitoring question: who can administer which Windows systems, from where, and can the SOC prove that unusual admin-share use would be noticed?

Executive priority

Prioritize this technique where Windows domains, shared administrator accounts, broad local admin rights, or flat internal networks exist. It is relevant to business continuity because legitimate remote administration paths can also enable rapid movement between workstations and servers. Governance evidence should focus on privileged account management, password policy enforcement, network access restrictions to administrative shares/services, and logging accountability for privileged SMB/RPC activity.

Technical view

This is a Windows lateral-movement sub-technique under Remote Services. ATT&CK provides no official detection text, but the related detection strategy DET0530 indicates a multi-event approach for SMB admin share lateral movement. SOC and IR teams should validate correlation across authenticated SMB sessions, access to C$/ADMIN$/IPC$, remote file transfer indicators, RPC activity, and follow-on execution patterns involving Scheduled Task/Job, Service Execution, or Windows Management Instrumentation where present. Treat Valid Accounts and Pass the Hash context as important pivots because the ATT&CK description ties this behavior to administrator-level credentials and NTLM hash use under certain configurations and patch levels.

Likely telemetry

  • Windows authentication and privileged logon records for remote administrative access
  • SMB file share access records, especially hidden administrative shares such as C$, ADMIN$, and IPC$
  • Endpoint file creation or transfer evidence on remote Windows systems
  • RPC-related activity associated with remote administration
  • Service creation/execution, scheduled task, and WMI activity following SMB authentication

Detection direction

  • Validate multi-event correlation rather than relying on a single SMB signal; legitimate administration can look similar in isolation.
  • Baseline expected administrator share access by admin accounts, management servers, and operational windows, then alert on unusual source hosts, destinations, account use, or chaining into remote execution.
  • Tune for sequences: privileged authentication to a host, admin-share access or file copy, then service, scheduled task, or WMI execution.
  • Review blind spots where endpoint logging, Windows event forwarding, share auditing, or east-west network visibility is incomplete.
  • Include credential-abuse context in triage, especially unexpected administrator-level access or activity consistent with Valid Accounts or Pass the Hash relationships described by ATT&CK.

Mitigation priorities

  • Start with Privileged Account Management: reduce standing administrator access, limit scope of privileged permissions, and ensure privileged use is logged and accountable.
  • Enforce Password Policies to reduce the risk of credential reuse and unauthorized use of valid accounts.
  • Limit Access to Resource Over Network by restricting who and what can reach administrative shares and remote services based on legitimate business need.
  • Filter Network Traffic to constrain lateral SMB/RPC traffic between internal systems rather than allowing broad workstation-to-workstation or workstation-to-server access.
  • Regularly audit administrative share permissions and remote administration paths to confirm controls match operational requirements.
Analyst notes and limits

This technique is a common defensive priority because it uses legitimate Windows administration mechanisms. The supplied relationship set shows broad use by multiple campaigns and groups, but that should be treated as ATT&CK historical context rather than evidence of activity in any specific environment. The revoked T1077 Windows Admin Shares relationship indicates this behavior is now represented as sub-technique T1021.002 under Remote Services.

MITRE does not provide an official detection section for this object. Specific event IDs, tool names, thresholds, and confirmed coverage require local logging configuration, Windows policy settings, network architecture, and administrative workflow knowledge. The object supports Windows as the platform; do not generalize coverage beyond that without separate evidence.

Official MITRE ATT&CK definition

SMB/Windows Admin Shares

Adversaries may use Valid Accounts to interact with a remote network share using Server Message Block (SMB). The adversary may then perform actions as the logged-on user.

SMB is a file, printer, and serial port sharing protocol for Windows machines on the same network or domain. Adversaries may use SMB to interact with file shares, allowing them to move laterally throughout a network. Linux and macOS implementations of SMB typically use Samba.

Windows systems have hidden network shares that are accessible only to administrators and provide the ability for remote file copy and other administrative functions. Example network shares include `C$`, `ADMIN$`, and `IPC$`. Adversaries may use this technique in conjunction with administrator-level Valid Accounts to remotely access a networked system over SMB,[1] to interact with systems using remote procedure calls (RPCs),[2] transfer files, and run transferred binaries through remote Execution. Example execution techniques that rely on authenticated sessions over SMB/RPC are Scheduled Task/Job, Service Execution, and Windows Management Instrumentation. Adversaries can also use NTLM hashes to access administrator shares on systems with Pass the Hash and certain configuration and patch levels.[3]

View the same entry on attack.mitre.org (MITRE-hosted reference; in-page links above use the Glexia ATT&CK library.)

Glexia analysis

How security teams should use this page

Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.

ATT&CK relationship table

Related techniques

This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.

2 rows
Domain ID Name Relationship / procedure
Enterprise T1021 Remote Services This object subtechnique of Remote Services.
Enterprise T1077 Windows Admin Shares Windows Admin Shares revoked by this object.
Associated objects

Groups, software, and campaigns

Group Enterprise

G1009: Moses Staff

Moses Staff is a suspected Iranian threat group that has primarily targeted Israeli companies since at least September 2021. Moses Staff openly stated their motivation in attacking Israeli companies is to cause damage by leaking stolen sensitive data and encrypting the victim's networks without a ransom demand.[1]

Security researchers assess Moses Staff is politically motivated, and has targeted government, finance, travel, energy, manufacturing, and utility companies outside of Israel as well, including those in Italy, India, Germany, Chile, Turkey, the UAE, and the US.[2]

Group Enterprise

G0143: Aquatic Panda

Aquatic Panda is a suspected China-based threat group with a dual mission of intelligence collection and industrial espionage. Active since at least May 2020, Aquatic Panda has primarily targeted entities in the telecommunications, technology, and government sectors.[1]

Group Enterprise

G0102: Wizard Spider

Wizard Spider is a Russia-based financially motivated threat group originally known for the creation and deployment of TrickBot since at least 2016. Wizard Spider possesses a diverse arsenal of tools and has conducted ransomware campaigns against a variety of organizations, ranging from major corporations to hospitals.[1][2][3]

Group Enterprise

G0096: APT41

APT41 is a threat group that researchers have assessed as Chinese state-sponsored espionage group that also conducts financially-motivated operations. Active since at least 2012, APT41 has been observed targeting various industries, including but not limited to healthcare, telecom, technology, finance, education, retail and video game industries in 14 countries.[1] Notable behaviors include using a wide range of malware and tools to complete mission objectives. APT41 overlaps at least partially with public reporting on groups including BARIUM and Winnti Group.[2][3]

Group Enterprise

G0004: Ke3chang

Ke3chang is a threat group attributed to actors operating out of China. Ke3chang has targeted oil, government, diplomatic, military, and NGOs in Central and South America, the Caribbean, Europe, and North America since at least 2010.[1][2][3][4]

Group Enterprise

G0010: Turla

Turla is a cyber espionage threat group that has been attributed to Russia's Federal Security Service (FSB). They have compromised victims in over 50 countries since at least 2004, spanning a range of industries including government, embassies, military, education, research and pharmaceutical companies. Turla is known for conducting watering hole and spearphishing campaigns, and leveraging in-house tools and malware, such as Uroburos.[1][2][3][4][5]

Group Enterprise

G1016: FIN13

FIN13 is a financially motivated cyber threat group that has targeted the financial, retail, and hospitality industries in Mexico and Latin America, as early as 2016. FIN13 achieves its objectives by stealing intellectual property, financial data, mergers and acquisition information, or PII.[1][2]

Group Enterprise

G0114: Chimera

Chimera is a suspected China-based threat group that has been active since at least 2018 targeting the semiconductor industry in Taiwan as well as data from the airline industry.[1][2]

Group Enterprise

G0117: Fox Kitten

Fox Kitten is threat actor with a suspected nexus to the Iranian government that has been active since at least 2017 against entities in the Middle East, North Africa, Europe, Australia, and North America. Fox Kitten has targeted multiple industrial verticals including oil and gas, technology, government, defense, healthcare, manufacturing, and engineering.[1][2][3][4]

Group Enterprise

G1040: Play

Play is a ransomware group that has been active since at least 2022 deploying Playcrypt ransomware against the business, government, critical infrastructure, healthcare, and media sectors in North America, South America, and Europe. Play actors employ a double-extortion model, encrypting systems after exfiltrating data, and are presumed by security researchers to operate as a closed group.[1][2]

Group Enterprise

G0034: Sandworm Team

Sandworm Team is a destructive threat group that has been attributed to Russia's General Staff Main Intelligence Directorate (GRU) Main Center for Special Technologies (GTsST) military unit 74455.[1][2] This group has been active since at least 2009.[3][4][5][6]

In October 2020, the US indicted six GRU Unit 74455 officers associated with Sandworm Team for the following cyber operations: the 2015 and 2016 attacks against Ukrainian electrical companies and government organizations, the 2017 worldwide NotPetya attack, targeting of the 2017 French presidential campaign, the 2018 Olympic Destroyer attack against the Winter Olympic Games, the 2018 operation against the Organisation for the Prohibition of Chemical Weapons, and attacks against the country of Georgia in 2018 and 2019.[1][2] Some of these were conducted with the assistance of GRU Unit 26165, which is also referred to as APT28.[7]

Malware Enterprise

S0575: Conti

Conti is a Ransomware-as-a-Service (RaaS) that was first observed in December 2019. Conti has been deployed via TrickBot and used against major corporations and government agencies, particularly those in North America. As with other ransomware families, actors using Conti steal sensitive files and information from compromised networks, and threaten to publish this data unless the ransom is paid.[1][2][3]

Windows
Malware Enterprise

S0367: Emotet

Emotet is a modular malware variant which is primarily used as a downloader for other malware variants such as TrickBot and IcedID. Emotet first emerged in June 2014, initially targeting the financial sector, and has expanded to multiple verticals over time.[1]

Windows
Malware Enterprise

S0446: Ryuk

Ryuk is a ransomware designed to target enterprise environments that has been used in attacks since at least 2018. Ryuk shares code similarities with Hermes ransomware.[1][2][3]

Windows
Tool Enterprise

S0029: PsExec

PsExec is a free Microsoft tool that can be used to execute a program on another computer. It is used by IT administrators and attackers.[1][2]

Windows
Malware Enterprise

S0140: Shamoon

Shamoon is wiper malware that was first used by an Iranian group known as the "Cutting Sword of Justice" in 2012. Other versions known as Shamoon 2 and Shamoon 3 were observed in 2016 and 2018. Shamoon has also been seen leveraging RawDisk and Filerase to carry out data wiping tasks. Analysis has linked Shamoon with Kwampirs based on multiple shared artifacts and coding patterns.[1] The term Shamoon is sometimes used to refer to the group using the malware as well as the malware itself.[2][3][4][5]

Windows
Malware Enterprise

S1073: Royal

Royal is ransomware that first appeared in early 2022; a version that also targets ESXi servers was later observed in February 2023. Royal employs partial encryption and multiple threads to evade detection and speed encryption. Royal has been used in attacks against multiple industries worldwide--including critical infrastructure. Security researchers have identified similarities in the encryption routines and TTPs used in Royal and Conti attacks and noted a possible connection between their operators.[1][2][3][4][5]

WindowsESXi
Malware Enterprise

S0368: NotPetya

NotPetya is malware that was used by Sandworm Team in a worldwide attack starting on June 27, 2017. While NotPetya appears as a form of ransomware, its main purpose was to destroy data and disk structures on compromised systems; the attackers never intended to make the encrypted data recoverable. As such, NotPetya may be more appropriately thought of as a form of wiper malware. NotPetya contains worm-like features to spread itself across a computer network using the SMBv1 exploits EternalBlue and EternalRomance.[1][2][3][4]

Windows
Malware Enterprise

S0659: Diavol

Diavol is a ransomware variant first observed in June 2021 that is capable of prioritizing file types to encrypt based on a pre-configured list of extensions defined by the attacker. The Diavol Ransomware-as-a Service (RaaS) program is managed by Wizard Spider and it has been observed being deployed by Bazar.[1][2][3][4]

Windows
Malware Enterprise

S0089: BlackEnergy

BlackEnergy is a malware toolkit that has been used by both criminal and APT actors. It dates back to at least 2007 and was originally designed to create botnets for use in conducting Distributed Denial of Service (DDoS) attacks, but its use has evolved to support various plug-ins. It is well known for being used during the confrontation between Georgia and Russia in 2008, as well as in targeting Ukrainian institutions. Variants include BlackEnergy 2 and BlackEnergy 3. [1]

Windows
Malware Enterprise

S1242: Qilin

Qilin is a ransomware family operated as a ransomware-as-a-service (RaaS) that has been active since at least 2022. It includes variants written in Go and Rust capable of targeting Windows, Linux, and VMware ESXi environments. Qilin shares functionality overlaps with Black Basta, REvil, and BlackCat ransomware. Qilin affiliates have targeted multiple entities worldwide with the majority of victims in the US, France, Canada, and the UK, primarily in the manufacturing, technology, financial services, and healthcare sectors.[1][2][3][4][5]

ESXiWindowsLinux
Campaign Enterprise

C0049: Leviathan Australian Intrusions

Leviathan Australian Intrusions consisted of at least two long-term intrusions against victims in Australia by Leviathan, relying on similar tradecraft such as external service exploitation followed by extensive credential capture and re-use to enable privilege escalation and lateral movement. Leviathan Australian Intrusions were focused on exfiltrating sensitive data including valid credentials for the victim organizations.[1]

Campaign Enterprise

C0024: SolarWinds Compromise

The SolarWinds Compromise was a sophisticated supply chain cyber operation conducted by APT29 that was discovered in mid-December 2020. APT29 used customized malware to inject malicious code into the SolarWinds Orion software build process that was later distributed through a normal software update; they also used password spraying, token theft, API abuse, spear phishing, and other supply chain attacks to compromise user accounts and leverage their associated access. Victims of this campaign included government, consulting, technology, telecom, and other organizations in North America, Europe, Asia, and the Middle East. This activity has been labled the StellarParticle campaign in industry reporting.[1] Industry reporting also initially referred to the actors involved in this campaign as UNC2452, NOBELIUM, Dark Halo, and SolarStorm.[2][3][4][5][1][6][7][8]

In April 2021, the US and UK governments attributed the SolarWinds Compromise to Russia's Foreign Intelligence Service (SVR); public statements included citations to APT29, Cozy Bear, and The Dukes.[9][10][11] The US government assessed that of the approximately 18,000 affected public and private sector customers of Solar Winds’ Orion product, a much smaller number were compromised by follow-on APT29 activity on their systems.[12]

Campaign Enterprise

C0014: Operation Wocao

Operation Wocao was a cyber espionage campaign that targeted organizations around the world, including in Brazil, China, France, Germany, Italy, Mexico, Portugal, Spain, the United Kingdom, and the United States. The suspected China-based actors compromised government organizations and managed service providers, as well as aviation, construction, energy, finance, health care, insurance, offshore engineering, software development, and transportation companies.[1]

Security researchers assessed the Operation Wocao actors used similar TTPs and tools as APT20, suggesting a possible overlap. Operation Wocao was named after an observed command line entry by one of the threat actors, possibly out of frustration from losing webshell access.[1]

Campaign Enterprise

C0038: HomeLand Justice

HomeLand Justice was a disruptive cyber campaign conducted by Iranian state-affiliated actors against Albanian government networks in July and September 2022. The activity combined ransomware, wiper malware, and data leak operations. Initial access for HomeLand Justice was established as early as May 2021, and threat actors moved laterally, exfiltrated sensitive information, and maintained persistence for approximately 14 months prior to the destructive phase of the operation. Responsibility was claimed by the "HomeLand Justice" front, which framed the campaign as retaliation against the Mujahedeen-e Khalq (MEK), an Iranian opposition group with a presence in Albania. Multiple Iran-nexus groups are assessed to have participated in the campaign, including HEXANE who probed victim infrastructure.[1][2][3] A second wave of attacks was launched in September 2022 using similar tactics following public attribution of the previous activity to Iran and the severing of diplomatic ties between Iran and Albania.[3]

Campaign Enterprise

C0029: Cutting Edge

Cutting Edge was a campaign conducted by suspected China-nexus espionage actors, variously identified as UNC5221/UTA0178 and UNC5325, that began as early as December 2023 with the exploitation of zero-day vulnerabilities in Ivanti Connect Secure (previously Pulse Secure) VPN appliances. Cutting Edge targeted the U.S. defense industrial base and multiple sectors globally including telecommunications, financial, aerospace, and technology. Cutting Edge featured the use of defense evasion and living-off-the-land (LoTL) techniques along with the deployment of web shells and other custom malware.[1][2][3][4][5]

Campaign Enterprise

C0051: APT28 Nearest Neighbor Campaign

APT28 Nearest Neighbor Campaign was conducted by APT28 from early February 2022 to November 2024 against organizations and individuals with expertise on Ukraine. APT28 primarily leveraged living-off-the-land techniques, while leveraging the zero-day exploitation of CVE-2022-38028. Notably, APT28 leveraged Wi-Fi networks in close proximity to the intended target to gain initial access to the victim environment. By daisy-chaining multiple compromised organizations nearby the intended target, APT28 discovered dual-homed systems (with both a wired and wireless network connection) to enable Wi-Fi and use compromised credentials to connect to the victim network.[1]

Relationship explorer

All related ATT&CK context

Mitigations

Mitigation direction

Change history

Object version and sync metadata

The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates .

ATT&CK release
19.1
Object version
1.3
Created
Modified
Raw hash
288ab7d31f64d8f6...
Imported snapshots across ATT&CK releases (1)
Release Bundle imported Object version Modified Status Raw hash
19.1 1.3 Current bundle 288ab7d31f64…
Raw source

Mirrored ATT&CK source object

The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.

Source references

External references and citations

MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.

  1. [1]
    Wikipedia Server Message Block

    Wikipedia. (2017, December 16). Server Message Block. Retrieved December 21, 2017.

    Open source URL
  2. [2]
    TechNet RPC

    Microsoft. (2003, March 28). What Is RPC?. Retrieved June 12, 2016.

    Open source URL
  3. [3]
    Microsoft Admin Shares

    Microsoft. (n.d.). How to create and delete hidden or administrative shares on client computers. Retrieved November 20, 2014.

    Open source URL
  4. [4]
    Lateral Movement Payne

    Payne, J. (2015, November 26). Tracking Lateral Movement Part One - Special Groups and Specific Service Accounts. Retrieved February 1, 2016.

    Open source URL
  5. [5]
    Medium Detecting WMI Persistence

    French, D. (2018, October 9). Detecting & Removing an Attacker’s WMI Persistence. Retrieved October 11, 2019.

    Open source URL
  6. [6]
    Windows Event Forwarding Payne

    Payne, J. (2015, November 23). Monitoring what matters - Windows Event Forwarding for everyone (even if you already have a SIEM.). Retrieved February 1, 2016.

    Open source URL
  7. [7]
    mitre-attack T1021.002
    Open source URL
Source and licensing

Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.