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🇷🇺 RU1 malware family

blue_callisto

Also known asblue_callisto

Blue Callisto, also known as SEABORGIUM and Callisto Group, is a likely Russia-based threat actor that has primarily conducted phishing attacks for espionage purposes since at least 2017. Reported targeting includes US and European government officials and organizations linked to national security matters, the UK Foreign Office in 2017, UK and US universities in 2020 and 2022, and entities connected to nuclear non-proliferation work. Since the start of the Russo-Ukraine war in 2022, the actor has shown increased interest in Ukraine, including at least one private Ukrainian logistics-related company, and in October 2022 was observed targeting an organization investigating war crimes. Observed tradecraft in 2022 included credential-harvesting phishing infrastructure using Google-themed sign-in pages, statically prefilled victim email addresses, browser-fingerprinting JavaScript to identify automated scanners and antivirus technologies before redirecting victims, and use of phishing technologies such as Evilginx. The reported activity was mapped to MITRE ATT&CK techniques T1566.002, T1059.007, T1140, and T1082. The actor remained active in 2022, making modest infrastructure and tooling changes while continuing to use phishing TTPs observed as far back as 2019.

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OPERATIONAL PROFILE

Targeting

Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.

Who they target

Sectors the actor has been observed targeting.

  • Government & Administration
  • Academia & Research
  • Commercial & Professional Services

Where they target

Geographies tied to known operations.

  • 🇺🇸 United States
  • 🇬🇧 United Kingdom
  • 🇺🇦 Ukraine

Where they're from

Attributed origin per open-source reporting.

  • RU
MITRE ATT&CK

Tradecraft

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

9 of 15 tactics13 techniques×N= number of intelligence reports citing this technique
MITRE ATT&CK
TA0043
Reconnaissance
1 technique
T1598
Phishing for Information
TA0001
Initial Access
2 techniques
T1078
Valid Accounts
T1566
Phishing
T1566.002
Spearphishing Link
TA0002
Execution
1 technique
T1059
Command and Scripting Interpreter
T1059.007
JavaScript
TA0003
Persistence
1 technique
T1078
Valid Accounts
TA0004
Privilege Escalation
1 technique
T1078
Valid Accounts
TA0005
Stealth
2 techniques
T1078
Valid Accounts
T1140
Deobfuscate/Decode Files or Information
TA0006
Credential Access
1 technique
T1056
Input Capture
TA0007
Discovery
1 technique
T1082
System Information Discovery
TA0009
Collection
1 technique
T1056
Input Capture
ARSENAL

Associated malware families

1 malware family attributed to this actor across reporting.

FamilyContextEvidenceLast seen
EvilGinxThe threat actor’s tools, techniques and procedures (TTPs) contained slight shifts during 2022, such as network provider preferences and use of phishing technologies such as Evilginx.1May 25, 2026
IOCS

Observables

14 indicators attributed to this actor: domains, IPs, hashes, and other artifacts pulled from reporting. View more in app.

14 IOCsView more in app

IOC values are gated. View more in Mallory for domains, IPs, hashes, and other artifacts, or pipe them straight into your SIEM.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

1 SOURCESView more in app
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Target overlap

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

Tradecraft mapping8

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

Malware arsenal1

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

Exploited CVEs

CVEs this actor has used in known campaigns.

Detection signatures

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

Observables14

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