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1 malware familyExploits CVEs in the wild

HAFNIUM Group

Also known asHAFNIUM Group

HAFNIUM Group is referenced in the provided content as a threat actor associated with Splunk analytic stories and detections, including "Windows File Download Via PowerShell" and an analytic story listing "HAFNIUM Group" alongside other actor names. The content ties this reference to PowerShell-related behaviors and detections mapped to MITRE ATT&CK T1059.001, including file download via PowerShell and Nishang PowershellTCPOneLine. No additional high-confidence details about HAFNIUM Group’s origin, targets, sub-groups, or broader operations are directly provided in the content. The only alias directly provided is "hafnium_group."

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MITRE ATT&CK

Tradecraft

6 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.

5 of 15 tactics9 techniques×N= number of intelligence reports citing this technique
MITRE ATT&CK
TA0001
Initial Access
1 technique
T1190
Exploit Public-Facing Application
TA0002
Execution
1 technique
T1059
Command and Scripting Interpreter
T1059.001×3
PowerShell
TA0003
Persistence
1 technique
T1505
Server Software Component
T1505.003
Web Shell
TA0006
Credential Access
1 technique
T1003
OS Credential Dumping
T1003.001
LSASS Memory
T1003.003
NTDS
TA0011
Command and Control
1 technique
T1105×2
Ingress Tool Transfer
ARSENAL

Associated malware families

1 malware family attributed to this actor across reporting.

FamilyContextEvidenceLast seen
RunganDetect Exchange Web Shell ... BlackByte Ransomware, Seashell Blizzard, GhostRedirector IIS Module and Rungan Backdoor1Mar 17, 2026
WEAPONIZED

Associated vulnerabilities

4 CVEs this actor has used in observed campaigns. 4 of them exploited in the wild.

CVE-2021-26855ProxyLogon SSRF in Microsoft Exchange ServerIn the wildEvidence2

The vulnerabilities recently being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065.

CVE-2021-26857Microsoft Exchange Unified Messaging insecure deserialization RCEIn the wildEvidence2

The vulnerabilities recently being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065.

CVE-2021-26858Microsoft Exchange Server post-auth arbitrary file write (ProxyLogon)In the wildEvidence2

The vulnerabilities recently being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065.

CVE-2021-27065ProxyLogon post-auth arbitrary file write in Microsoft Exchange ServerIn the wildEvidence2

The vulnerabilities recently being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065.

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
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Target overlap

Match sector + geo + tech-stack targeting against your real footprint.

Tradecraft mapping6

Every observed MITRE ATT&CK technique, grouped by tactic.

Malware arsenal1

Families this actor is known to deploy, with IOCs and behavior.

Exploited CVEs4

CVEs this actor has used in known campaigns.

Detection signatures

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

Observables

Domains, IPs, and hashes tied to this actor, refreshed continuously.