Russian-speaking group targeting financial organizations and ATM systems primarily in CIS countries, stealing millions via ATM jackpotting. This profile is mapped to MITRE ATT&CK G0091 and covers attribution, tooling, targeting, and defensive recommendations based on observed campaigns.
Overview & Attribution
Silence (also tracked as Whisper Spider) is a threat group attributed to Russia. The group primarily targets Banks, ATM networks, CIS countries for intelligence collection and operational objectives aligned with state interests.
This group is tracked as G0091 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 Silence include:
- Silence trojan
- Atmosphere
- TrueBot
Targeting & Operations
Silence operations focus on Banks, ATM networks, CIS countries. 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 Banks sector should treat Silence 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 Silence operations:
| Technique ID | Technique Name | Tactical Context |
|---|---|---|
| T1566.001 | T1566.001 | Observed in Silence campaigns |
| T1059.001 | T1059.001 | Observed in Silence campaigns |
| T1021.001 | T1021.001 | Observed in Silence campaigns |
| T1071.001 | T1071.001 | Observed in Silence campaigns |
Full ATT&CK mapping: https://attack.mitre.org/groups/G0091/
Notable Campaigns
This threat group has been active in operations targeting Banks, ATM networks, CIS countries. Security researchers have documented campaigns involving Silence trojan and other tools deployed against organizations in multiple countries. Attribution confidence varies by campaign, but consistent infrastructure and TTP overlap links activity to Russia-nexus operations.
Detection & Defense
Recommended defensive measures against Silence:
- Network monitoring: Detect C2 beaconing patterns associated with Silence trojan 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 G0091 in MITRE ATT&CK
How Mjolnir Security Can Help
Defend Against Silence
Mjolnir Security provides tailored threat intelligence, detection engineering, and incident response services to help organizations defend against Russia-nexus threat actors.
Contact us: mjolnirsecurity.com
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