Iranian MOIS-affiliated group focused on surveillance of individuals through telecom and travel industry compromise since 2014. This profile is mapped to MITRE ATT&CK G0087 and covers attribution, tooling, targeting, and defensive recommendations based on observed campaigns.
Overview & Attribution
APT39 (also tracked as Chafer, Remix Kitten, ITG07) is a threat group attributed to Iran. The group primarily targets Telecoms, travel, IT, government for intelligence collection and operational objectives aligned with state interests.
This group is tracked as G0087 in the MITRE ATT&CK framework. All techniques referenced in this report are mapped to ATT&CK for consistent threat modeling and detection engineering.
Arsenal & Tools
Known tools and malware associated with APT39 include:
- SEAWEED
- CACHEMONEY
- Remexi
Targeting & Operations
APT39 operations focus on Telecoms, travel, IT, government. The group typically gains initial access through spear-phishing, exploitation of public-facing applications, or strategic web compromises before deploying custom implants for persistent access and data exfiltration.
Organizations in the Telecoms sector should treat APT39 as a relevant threat and validate their detection coverage against the MITRE ATT&CK techniques listed below.
MITRE ATT&CK Mapping
Key techniques observed in APT39 operations:
| Technique ID | Technique Name | Tactical Context |
|---|---|---|
| T1566.001 | T1566.001 | Observed in APT39 campaigns |
| T1059.001 | T1059.001 | Observed in APT39 campaigns |
| T1003.001 | T1003.001 | Observed in APT39 campaigns |
| T1071.001 | T1071.001 | Observed in APT39 campaigns |
Full ATT&CK mapping: https://attack.mitre.org/groups/G0087/
Notable Campaigns
This threat group has been active in operations targeting Telecoms, travel, IT, government. Security researchers have documented campaigns involving SEAWEED and other tools deployed against organizations in multiple countries. Attribution confidence varies by campaign, but consistent infrastructure and TTP overlap links activity to Iran-nexus operations.
Detection & Defense
Recommended defensive measures against APT39:
- Network monitoring: Detect C2 beaconing patterns associated with SEAWEED and related implants
- Endpoint detection: Deploy behavioral rules for the ATT&CK techniques above, particularly T1566.001 and T1059.001
- Email security: Implement robust phishing defenses including URL sandboxing and attachment detonation
- Patch management: Prioritize patching of internet-facing applications exploited by this group
- Threat hunting: Proactively hunt for IOCs and behavioral indicators mapped to G0087 in MITRE ATT&CK
How Mjolnir Security Can Help
Defend Against APT39
Mjolnir Security provides tailored threat intelligence, detection engineering, and incident response services to help organizations defend against Iran-nexus threat actors.
Contact us: mjolnirsecurity.com
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