Gamaredon Group
Also known as: IRON TILDEN · Primitive Bear · ACTINIUM · Armageddon · Shuckworm · DEV-0157 · Aqua Blizzard · NastyShrew
Overview
Gamaredon Group is a suspected Russian cyber espionage group that has targeted military, law enforcement, judiciary, non-profit, and non-governmental organizations in Ukraine since at least 2013. The name Gamaredon Group derives from a misspelling of the word "Armageddon," found in early campaigns. In November 2021, the Ukrainian government publicly attributed Gamaredon Group to Russia’s Federal Security Service (FSB) Center 18, an assessment later supported by multiple independent cybersecurity researchers.
Naming & attribution
Gamaredon Group is tracked under 9 names across the industry. It uses 70 documented ATT&CK techniques — more than 94% of the 174 groups tracked here. Activity attributed since at least 2013.
| Name | First reported by |
|---|---|
| IRON TILDEN | Secureworks CTU |
| Primitive Bear | Unit 42 |
| ACTINIUM | Microsoft Threat Intelligence Center |
| Armageddon | Symantec |
| Shuckworm | Symantec |
| DEV-0157 | Microsoft Threat Intelligence Center |
| Aqua Blizzard | Microsoft |
| NastyShrew | Cloudflare |
| Gamaredon Group | Kasza, A. and Reichel, D |
Distinctive techniques
Techniques this group uses that are rare across the other 173 tracked groups — these carry more signal than the near-universal ones.
-
T1001Data Obfuscation — used by 1 of 174 groups -
T1102.003One-Way Communication — used by 2 of 174 groups -
T1137Office Application Startup — used by 2 of 174 groups -
T1027.012LNK Icon Smuggling — used by 3 of 174 groups -
T1491.001Internal Defacement — used by 3 of 174 groups -
T1561.001Disk Content Wipe — used by 3 of 174 groups -
T1568.001Fast Flux DNS — used by 3 of 174 groups
Closest groups by technique overlap
Computed from shared ATT&CK techniques. Overlap is not attribution — distinct actors converge on the same tradecraft — but a high share is a useful pivot.
- MuddyWater Iran — 33 shared techniques (31% overlap)
- Kimsuky North Korea — 45 shared techniques (29% overlap)
- FIN7 — 31 shared techniques (29% overlap)
- TA2541 — 22 shared techniques (29% overlap)
- APT32 Vietnam — 32 shared techniques (28% overlap)
- Mustang Panda China — 31 shared techniques (25% overlap)
Malware families with current indicators
One family attributed to Gamaredon Group, carrying 2,964 indicators currently tracked from abuse.ch ThreatFox, MalwareBazaar, URLhaus and SSLBL. MITRE documents what a group does; this is what its tooling is doing now.
- Remcos 2,964 indicators
Browse or copy the indicators by hash, domain, IP or URL, filtered by age from 1 day to 3 years.
Targets
Government
Regions
Germany · Ukraine
Capabilities
- Destructive / data-wiping operations — ATT&CK T1561.001
- Custom malware/implant development — ATT&CK: 3 attributed custom malware families
TTPs — 70 techniques across 12 tactics
Resource Development
-
T1583.001Domains -
T1583.003Virtual Private Server -
T1583.006Web Services -
T1587.003Digital Certificates -
T1588.002Tool -
T1608.001Upload Malware
Initial Access
-
T1566.001Spearphishing Attachment
Execution
-
T1047Windows Management Instrumentation -
T1053.005Scheduled Task -
T1059.001PowerShell -
T1059.003Windows Command Shell -
T1059.005Visual Basic -
T1106Native API -
T1204.001Malicious Link -
T1204.002Malicious File -
T1559.001Component Object Model
Persistence
-
T1137Office Application Startup -
T1547.001Registry Run Keys / Startup Folder
Stealth
-
T1027Obfuscated Files or Information -
T1027.004Compile After Delivery -
T1027.010Command Obfuscation -
T1027.012LNK Icon Smuggling -
T1027.015Compression -
T1027.016Junk Code Insertion -
T1036.005Match Legitimate Resource Name or Location -
T1055Process Injection -
T1070.004File Deletion -
T1140Deobfuscate/Decode Files or Information -
T1218.005Mshta -
T1218.011Rundll32 -
T1221Template Injection -
T1480Execution Guardrails -
T1497.001System Checks -
T1564.003Hidden Window -
T1620Reflective Code Loading
Defense Impairment
-
T1112Modify Registry -
T1685Disable or Modify Tools
Discovery
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T1012Query Registry -
T1016.001Internet Connection Discovery -
T1033System Owner/User Discovery -
T1057Process Discovery -
T1082System Information Discovery -
T1083File and Directory Discovery -
T1120Peripheral Device Discovery -
T1518.001Security Software Discovery
Lateral Movement
-
T1021.005VNC -
T1080Taint Shared Content -
T1091Replication Through Removable Media -
T1534Internal Spearphishing
Collection
-
T1005Data from Local System -
T1025Data from Removable Media -
T1039Data from Network Shared Drive -
T1113Screen Capture -
T1119Automated Collection
Command and Control
-
T1001Data Obfuscation -
T1071.001Web Protocols -
T1090Proxy -
T1090.003Multi-hop Proxy -
T1095Non-Application Layer Protocol -
T1102Web Service -
T1102.002Bidirectional Communication -
T1102.003One-Way Communication -
T1105Ingress Tool Transfer -
T1568Dynamic Resolution -
T1568.001Fast Flux DNS -
T1571Non-Standard Port
Exfiltration
-
T1020Automated Exfiltration -
T1041Exfiltration Over C2 Channel
Impact
-
T1491.001Internal Defacement -
T1561.001Disk Content Wipe
Tools & malware (6)
QuietSieve · Pteranodon · Remcos · Ping · Reg · PowerPunch
Reporting (3)
- Introducing the 2026 Cloudflare Threat Report — Cloudflare
- How Microsoft names threat actors — Microsoft
- ACTINIUM targets Ukrainian organizations — Microsoft Threat Intelligence Center