Group5 Threat Profile

Threat group targeting the Syrian opposition using commercial RATs and social engineering over social media platforms. This profile is mapped to MITRE ATT&CK G0043 and covers attribution, tooling, targeting, and defensive recommendations based on observed campaigns.

Overview & Attribution

Group5 (also tracked as None publicly documented) is a threat group attributed to Iran. The group primarily targets Syrian opposition for intelligence collection and operational objectives aligned with state interests.

Arsenal & Tools

Known tools and malware associated with Group5 include:

• njRAT
• NanoCore
• DarkComet

Targeting & Operations

Group5 operations focus on Syrian opposition. 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.

MITRE ATT&CK Mapping

Key techniques observed in Group5 operations:

Full ATT&CK mapping: https://attack.mitre.org/groups/G0043/

Notable Campaigns

This threat group has been active in operations targeting Syrian opposition. Security researchers have documented campaigns involving njRAT 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 Group5:

• Network monitoring: Detect C2 beaconing patterns associated with njRAT and related implants
• Endpoint detection: Deploy behavioral rules for the ATT&CK techniques above, particularly T1566.003 and T1204.002
• 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 G0043 in MITRE ATT&CK

How Mjolnir Security Can Help