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Cybersecurity and Infrastructure Security Agency (CISA)

You are subscribed to Cybersecurity Advisories for Cybersecurity and Infras= tructure Security Agency. This information has recently been updated and is=
now available.

CISA and Partners Release Advisory on Iranian-Affiliated Cyber Actors Targe= ting US Critical Infrastructure [ https://www.cisa.gov/news-events/cybersec= urity-advisories/aa26-096a?utm_source=3DIranPLC202604&utm_medium=3DGovDeliv= ery ] 04/07/2026 1:30 PM EST=20

CISA, in partnership with Federal Bureau of Investigation, National Securit=
y Agency, Environmental Protection Agency, Department of Energy, and United=
States Cyber Command - Cyber National Mission Force published joint Cybers= ecurity Advisory Iranian-Affiliated Cyber Actors Exploit Programmable Logic=
Controllers Across US Critical Infrastructure [ https://www.cisa.gov/news-= events/cybersecurity-advisories/aa26-097a?utm_source=3DIranPLC202604&utm_me= dium=3DGovDelivery ]. The advisory warns U.S. organizations of ongoing cybe=
r exploitation targeting internet-connected operational technology devices,=
including Rockwell Automation/Allen-Bradley programmable logic controllers=
(PLCs), across multiple critical infrastructure sectors, including Governm= ent Services and Facilities (to include local municipalities), Water and Wa= stewater Systems, and Energy.

These disruptions include malicious interactions with the project file and = manipulation of data on human machine interface and supervisory control and=
data acquisition displays, resulting in operational disruption and financi=
al loss. The authoring agencies recommend organizations review the tactics,=
techniques, and procedures and indicators of compromise in this advisory f=
or indications of current or historical activity on their networks and appl=
y the recommendations in this advisory to reduce the risk of compromise.

*Key Actions*


* Remove PLCs from direct internet exposure via secure gateway and firewa= ll.=20
* Query available logs for the provided IOCs in the corresponding time fr= ames.=20
* Check available logs for suspicious traffic on the ports associated wit=
h OT devices, including 44818, 2222, 102, and 502, especially traffic origi= nating from overseas hosting providers.=20
* Place the physical key switch on the controller into the run position. = Contact the authoring agencies and Rockwell Automation for guidance if you = believe your organization was targeted.=20

For more information on Iranian malicious cyber activity, see CISA=E2=80=99=
s Iran Cyber Threat Overview and Advisories [ https://www.cisa.gov/topics/c= yber-threats-and-advisories/advanced-persistent-threats/iran ] webpage and = the FBI=E2=80=99s Iran Threat [ https://www.fbi.gov/investigate/counterinte= lligence/the-iran-threat ] webpage.

Please share your thoughts with us through this this anonymous survey [ htt= ps://cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?Source=3DGov= Deliveryhttps://www.cisa.gov/news-events/cybersecurity-advisories/aa26-097a=
]. We appreciate your feedback!

This product is provided subject to this=C2=A0Notification [ https://www.ci= sa.gov/notification ]=C2=A0and this=C2=A0Privacy & Use [ https://www.cisa.g= ov/privacy-policy ]=C2=A0policy.

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Having trouble viewing this message?=C2=A0View it as a webpage [ https://co= ntent.govdelivery.com/accounts/USDHSCISA/bulletins/41141d6 ].=C2=A0 [ https= ://content.govdelivery.com/accounts/USDHS/bulletins/292141e ]

You are subscribed to updates from the Cybersecurity and Infrastructure Sec= urity Agency [ https://www.cisa.gov ] (CISA)
Manage Subscriptions [ https://public.govdelivery.com/accounts/USDHSCISA/su= bscriber/edit?preferences=3Dtrue#tab1 ]=C2=A0=C2=A0|=C2=A0=C2=A0Privacy Pol= icy [ https://www.cisa.gov/privacy-policy ]=C2=A0=C2=A0|=C2=A0 Help [ https= ://subscriberhelp.granicus.com/s/article/Subscriber-Help-Center ] [ https:/= /insights.govdelivery.com/Communications/Subscriber_Help_Center ]

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<title> CISA and Partners Release Advisory on Iranian-Affiliated Cyber A= ctors Targeting US Critical Infrastructure
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<p><img src=3D"https://content.govdelivery.com/attachments/fancy_images/U= SDHSCISA/2020/06/3486054/05152023-gov-delivery-banner-copy_original.png" al= t=3D"Cybersecurity and Infrastructure Security Agency (CISA)" title=3D"" wi= dth=3D"600" height=3D"100"></p>
<p>You are subscribed to Cybersecurity Advisories for Cybersecurity and I= nfrastructure Security Agency. This information has recently been updated a=
nd is now available.</p>
<div class=3D"rss_item" style=3D"margin-bottom: 2em;">
<div class=3D"rss_title" style=3D"font-weight: bold; font-size: 120%; margi=
n: 0 0 0.3em; padding: 0;"><a href=3D"https://www.cisa.gov/news-events/cybe= rsecurity-advisories/aa26-096a?utm_source=3DIranPLC202604&utm_medium=3DGovD= elivery" target=3D"_blank" title=3D"CISA and Partners Release Advisory on I= ranian-Affiliated Cyber Actors Targeting US Critical Infrastructure" rel=3D= "noopener">CISA and Partners Release Advisory on Iranian-Affiliated Cyber A= ctors Targeting US Critical Infrastructure</a></div>
<div class=3D"rss_pub_date" style=3D"font-size: 90%; font-style: italic; co= lor: #666666; margin: 0 0 0.3em; padding: 0;">04/07/2026 1:30 PM EST</div>
<div class=3D"l-page-section l-page-section--rich-text csaf-imported">
<div class=3D"l-constrain">
<div class=3D"l-page-section__content">
<p>CISA, in partnership with Federal Bureau of Investigation, National Secu= rity Agency, Environmental Protection Agency, Department of Energy, and Uni= ted States Cyber Command - Cyber National Mission Force published joint Cyb= ersecurity Advisory <a href=3D"https://www.cisa.gov/news-events/cybersecuri= ty-advisories/aa26-097a?utm_source=3DIranPLC202604&utm_medium=3DGovDelivery=
" target=3D"_blank" title=3D"Iranian-Affiliated Cyber Actors Exploit Progra= mmable Logic Controllers Across US Critical Infrastructure" rel=3D"noopener= ">Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Ac= ross US Critical Infrastructure</a>. The advisory warns U.S. organizations =
of ongoing cyber exploitation targeting internet-connected operational tech= nology devices, including Rockwell Automation/Allen-Bradley programmable lo= gic controllers (PLCs), across multiple critical infrastructure sectors, in= cluding Government Services and Facilities (to include local municipalities=
), Water and Wastewater Systems, and Energy.</p>
<p>These disruptions include malicious interactions with the project file a=
nd manipulation of data on human machine interface and supervisory control = and data acquisition displays, resulting in operational disruption and fina= ncial loss. The authoring agencies recommend organizations review the tacti= cs, techniques, and procedures and indicators of compromise in this advisor=
y for indications of current or historical activity on their networks and a= pply the recommendations in this advisory to reduce the risk of compromise.=

<p><strong>Key Actions</strong></p>

<li>Remove PLCs from direct internet exposure via secure gateway and firewa= ll.</li>
<li>Query available logs for the provided IOCs in the corresponding time fr= ames.</li>
<li>Check available logs for suspicious traffic on the ports associated wit=
h OT devices, including 44818, 2222, 102, and 502, especially traffic origi= nating from overseas hosting providers.</li>
<li>Place the physical key switch on the controller into the run position. = Contact the authoring agencies and Rockwell Automation for guidance if you = believe your organization was targeted.</li>
</ul>
<p>For more information on Iranian malicious cyber activity, see CISA=E2=80= =99s <a href=3D"https://www.cisa.gov/topics/cyber-threats-and-advisories/ad= vanced-persistent-threats/iran" target=3D"_blank" title=3D"Iran Cyber Threa=
t Overview and Advisories" rel=3D"noopener">Iran Cyber Threat Overview and = Advisories</a> webpage and the FBI=E2=80=99s <a href=3D"https://www.fbi.gov= /investigate/counterintelligence/the-iran-threat" target=3D"_blank" title= =3D"Iran Threat" rel=3D"noopener">Iran Threat</a> webpage.</p>
<p>Please share your thoughts with us through this this <a href=3D"https://= cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?Source=3DGovDeliv= eryhttps://www.cisa.gov/news-events/cybersecurity-advisories/aa26-097a" tar= get=3D"_blank" title=3D"anonymous survey" rel=3D"noopener">anonymous survey= </a>. We appreciate your feedback!</p>
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<p>This product is provided subject to this=C2=A0<a href=3D"https://www.cis= a.gov/notification" target=3D"_blank" title=3D"Notification" rel=3D"noopene= r">Notification</a>=C2=A0and this=C2=A0<a href=3D"https://www.cisa.gov/priv= acy-policy" target=3D"_blank" title=3D"Privacy &amp; Use" rel=3D"noopener">= Privacy &amp; Use</a>=C2=A0policy.</p>
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