Исследование общих сетевых ресурсов
Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement. Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network.
File sharing over a Windows network occurs over the SMB protocol. (Citation: Wikipedia Shared Resource) (Citation: TechNet Shared Folder) Net can be used to query a remote system for available shared drives using the net view \\\\remotesystem
command. It can also be used to query shared drives on the local system using net share
. For macOS, the sharing -l
command lists all shared points used for smb services.
Примеры процедур |
|
Название | Описание |
---|---|
BADHATCH |
BADHATCH can check a user's access to the C$ share on a compromised machine.(Citation: BitDefender BADHATCH Mar 2021) |
Ramsay |
Ramsay can scan for network drives which may contain documents for collection.(Citation: Eset Ramsay May 2020)(Citation: Antiy CERT Ramsay April 2020) |
During C0015, the threat actors executed the PowerView ShareFinder module to identify open shares.(Citation: DFIR Conti Bazar Nov 2021) |
|
Conti |
Conti can enumerate remote open SMB network shares using |
Tonto Team |
Tonto Team has used tools such as NBTscan to enumerate network shares.(Citation: TrendMicro Tonto Team October 2020) |
Pupy |
Pupy can list local and remote shared drives and folders over SMB.(Citation: GitHub Pupy) |
Bazar |
Bazar can enumerate shared drives on the domain.(Citation: NCC Group Team9 June 2020) |
Latrodectus |
Latrodectus can run `C:\Windows\System32\cmd.exe /c net view /all` to discover network shares.(Citation: Elastic Latrodectus May 2024)(Citation: Bitsight Latrodectus June 2024) |
Cuba |
Cuba can discover shared resources using the |
Kwampirs |
Kwampirs collects a list of network shares with the command |
QakBot |
QakBot can use |
APT39 |
APT39 has used the post exploitation tool CrackMapExec to enumerate network shares.(Citation: BitDefender Chafer May 2020) |
SILENTTRINITY |
SILENTTRINITY can enumerate shares on a compromised host.(Citation: GitHub SILENTTRINITY Modules July 2019) |
Diavol |
Diavol has a `ENMDSKS` command to enumerates available network shares.(Citation: Fortinet Diavol July 2021) |
DarkVishnya |
DarkVishnya scanned the network for public shared folders.(Citation: Securelist DarkVishnya Dec 2018) |
Net |
The |
LunarWeb |
LunarWeb can identify shared resources in compromised environments.(Citation: ESET Turla Lunar toolset May 2024) |
APT32 |
APT32 used the |
FIVEHANDS |
FIVEHANDS can enumerate network shares and mounted drives on a network.(Citation: NCC Group Fivehands June 2021) |
Emotet |
Emotet has enumerated non-hidden network shares using `WNetEnumResourceW`. (Citation: Binary Defense Emotes Wi-Fi Spreader) |
APT41 |
APT41 used the |
Sardonic |
Sardonic has the ability to execute the `net view` command.(Citation: Bitdefender Sardonic Aug 2021) |
PlugX |
PlugX has a module to enumerate network shares.(Citation: CIRCL PlugX March 2013) |
CrackMapExec |
CrackMapExec can enumerate the shared folders and associated permissions for a targeted network.(Citation: CME Github September 2018) |
BitPaymer |
BitPaymer can search for network shares on the domain or workgroup using |
INC Ransomware |
INC Ransomware has the ability to check for shared network drives to encrypt.(Citation: Cybereason INC Ransomware November 2023) |
Empire |
Empire can find shared drives on the local system.(Citation: Github PowerShell Empire) |
Chimera |
Chimera has used |
Bad Rabbit |
Bad Rabbit enumerates open SMB shares on internal victim networks.(Citation: ESET Bad Rabbit) |
Dragonfly 2.0 |
Dragonfly 2.0 identified and browsed file servers in the victim network, sometimes , viewing files pertaining to ICS or Supervisory Control and Data Acquisition (SCADA) systems.(Citation: US-CERT TA18-074A)(Citation: US-CERT APT Energy Oct 2017) |
TrickBot |
TrickBot module shareDll/mshareDll discovers network shares via the WNetOpenEnumA API.(Citation: ESET Trickbot Oct 2020)(Citation: Bitdefender Trickbot March 2020) |
During Operation Wocao, threat actors discovered network disks mounted to the system using netstat.(Citation: FoxIT Wocao December 2019) |
|
KOPILUWAK |
KOPILUWAK can use netstat and Net to discover network shares.(Citation: Mandiant Suspected Turla Campaign February 2023) |
Akira |
Akira can identify remote file shares for encryption.(Citation: Kersten Akira 2023) |
APT38 |
APT38 has enumerated network shares on a compromised host.(Citation: CISA AA20-239A BeagleBoyz August 2020) |
Royal |
Royal can enumerate the shared resources of a given IP addresses using the API call `NetShareEnum`.(Citation: Cybereason Royal December 2022) |
WhisperGate |
WhisperGate can enumerate connected remote logical drives.(Citation: Cisco Ukraine Wipers January 2022) |
HELLOKITTY |
HELLOKITTY has the ability to enumerate network resources.(Citation: FireEye FiveHands April 2021) |
Clambling |
Clambling has the ability to enumerate network shares.(Citation: Trend Micro DRBControl February 2020) |
BlackCat |
BlackCat has the ability to discover network shares on compromised networks.(Citation: Microsoft BlackCat Jun 2022)(Citation: Sophos BlackCat Jul 2022) |
Cobalt Strike |
Cobalt Strike can query shared drives on the local system.(Citation: Cobalt Strike TTPs Dec 2017) |
Avaddon |
Avaddon has enumerated shared folders and mapped volumes.(Citation: Arxiv Avaddon Feb 2021) |
Flagpro |
Flagpro has been used to execute `net view` to discover mapped network shares.(Citation: NTT Security Flagpro new December 2021) |
Clop |
Clop can enumerate network shares.(Citation: Mcafee Clop Aug 2019) |
IcedID |
IcedID has used the `net view /all` command to show available shares.(Citation: DFIR_Quantum_Ransomware) |
Babuk |
Babuk has the ability to enumerate network shares.(Citation: Sogeti CERT ESEC Babuk March 2021) |
FIN13 |
FIN13 has executed net view commands for enumeration of open shares on compromised machines.(Citation: Mandiant FIN13 Aug 2022)(Citation: Sygnia Elephant Beetle Jan 2022) |
Tropic Trooper |
Tropic Trooper used |
WastedLocker |
WastedLocker can identify network adjacent and accessible drives.(Citation: Sentinel Labs WastedLocker July 2020) |
Olympic Destroyer |
Olympic Destroyer will attempt to enumerate mapped network shares to later attempt to wipe all files on those shares.(Citation: Talos Olympic Destroyer 2018) |
INC Ransom |
INC Ransom has used Internet Explorer to view folders on other systems.(Citation: Huntress INC Ransom Group August 2023) |
Sowbug |
Sowbug listed remote shared drives that were accessible from a victim.(Citation: Symantec Sowbug Nov 2017) |
MURKYTOP |
MURKYTOP has the capability to retrieve information about shares on remote hosts.(Citation: FireEye Periscope March 2018) |
OSInfo |
OSInfo discovers shares on the network(Citation: Symantec Buckeye) |
Stuxnet |
Stuxnet enumerates the directories of a network resource.(Citation: Nicolas Falliere, Liam O Murchu, Eric Chien February 2011) |
ShimRat |
ShimRat can enumerate connected drives for infected host machines.(Citation: FOX-IT May 2016 Mofang) |
Dragonfly |
Dragonfly has identified and browsed file servers in the victim network, sometimes , viewing files pertaining to ICS or Supervisory Control and Data Acquisition (SCADA) systems.(Citation: US-CERT TA18-074A) |
AvosLocker |
AvosLocker has enumerated shared drives on a compromised network.(Citation: Malwarebytes AvosLocker Jul 2021)(Citation: Joint CSA AvosLocker Mar 2022) |
Operation Wocao |
Operation Wocao has discovered network disks mounted to the system using netstat.(Citation: FoxIT Wocao December 2019) |
During Operation CuckooBees, the threat actors used the `net share` command as part of their advanced reconnaissance.(Citation: Cybereason OperationCuckooBees May 2022) |
|
APT1 |
APT1 listed connected network shares.(Citation: Mandiant APT1) |
InvisiMole |
InvisiMole can gather network share information.(Citation: ESET InvisiMole June 2018) |
Zebrocy |
Zebrocy identifies network drives when they are added to victim systems.(Citation: Securelist Sofacy Feb 2018) |
Cobalt Strike |
Cobalt Strike can query shared drives on the local system.(Citation: Cobalt Strike TTPs Dec 2017) |
Wizard Spider |
Wizard Spider has used the “net view” command to locate mapped network shares.(Citation: DHS/CISA Ransomware Targeting Healthcare October 2020) |
Koadic |
Koadic can scan local network for open SMB.(Citation: Github Koadic) |
DEATHRANSOM |
DEATHRANSOM has the ability to use loop operations to enumerate network resources.(Citation: FireEye FiveHands April 2021) |
QuietSieve |
QuietSieve can identify and search networked drives for specific file name extensions.(Citation: Microsoft Actinium February 2022) |
DUSTTRAP |
DUSTTRAP can identify and enumerate victim system network shares.(Citation: Google Cloud APT41 2024) |
Контрмеры |
|
Контрмера | Описание |
---|---|
Operating System Configuration |
Make configuration changes related to the operating system or a common feature of the operating system that result in system hardening against techniques. |
Network Share Discovery Mitigation |
Identify unnecessary system utilities or potentially malicious software that may be used to acquire network share information, and audit and/or block them by using whitelisting (Citation: Beechey 2010) tools, like AppLocker, (Citation: Windows Commands JPCERT) (Citation: NSA MS AppLocker) or Software Restriction Policies (Citation: Corio 2008) where appropriate. (Citation: TechNet Applocker vs SRP) |
Обнаружение
System and network discovery techniques normally occur throughout an operation as an adversary learns the environment. Data and events should not be viewed in isolation, but as part of a chain of behavior that could lead to other activities, such as Lateral Movement, based on the information obtained. Normal, benign system and network events related to legitimate remote system discovery may be uncommon, depending on the environment and how they are used. Monitor processes and command-line arguments for actions that could be taken to gather system and network information. Remote access tools with built-in features may interact directly with the Windows API to gather information. Information may also be acquired through Windows system management tools such as Windows Management Instrumentation and PowerShell.
Ссылки
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Связанные риски
Каталоги
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