Threat group.View on attack.mitre.org
Silence is a financially motivated threat actor targeting financial institutions in different countries. The group was first seen in June 2016. Their main targets reside in Russia, Ukraine, Belarus, Azerbaijan, Poland and Kazakhstan. They compromised various banking systems, including the Russian Central Bank's Automated Workstation Client, ATMs, and card processing.
| Technique | Procedure example |
|---|---|
| T1003.001 LSASS Memory |
Silence has used the Farse6.1 utility (based on Mimikatz) to extract credentials from lsass.exe. |
| T1018 Remote System Discovery |
Silence has used Nmap to scan the corporate network, build a network topology, and identify vulnerable hosts. |
| T1021.001 Remote Desktop Protocol |
Silence has used RDP for lateral movement. |
| T1027.010 Command Obfuscation |
Silence has used environment variable string substitution for obfuscation. |
| T1036.005 Match Legitimate Resource Name or Location |
Silence has named its backdoor "WINWORD.exe". |
| T1053.005 Scheduled Task |
Silence has used scheduled tasks to stage its operation. |
| T1055 Process Injection |
Silence has injected a DLL library containing a Trojan into the fwmain32.exe process. |
| T1059.001 PowerShell |
Silence has used PowerShell to download and execute payloads. |
| T1059.003 Windows Command Shell |
Silence has used Windows command-line to run commands. |
| T1059.005 Visual Basic |
Silence has used VBS scripts. |
| T1059.007 JavaScript |
Silence has used JS scripts. |
| T1070.004 File Deletion |
Silence has deleted artifacts, including scheduled tasks, communicates files from the C2 and other logs. |
| T1072 Software Deployment Tools |
Silence has used RAdmin, a remote software tool used to remotely control workstations and ATMs. |
| T1078 Valid Accounts |
Silence has used compromised credentials to log on to other systems and escalate privileges. |
| T1090.002 External Proxy |
Silence has used ProxyBot, which allows the attacker to redirect traffic from the current node to the backconnect server via Sock4\Socks5. |
None recorded.
Data from MITRE ATT&CK® (Enterprise). ATT&CK® is a registered trademark of The MITRE Corporation.
