Analysis Overview
SHA256
ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97
Threat Level: Known bad
The file SilverClient.exe was found to be: Known bad.
Malicious Activity Summary
Silverrat family
SilverRat
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Legitimate hosting services abused for malware hosting/C2
Enumerates physical storage devices
Unsigned PE
Uses Task Scheduler COM API
Delays execution with timeout.exe
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-26 06:25
Signatures
Silverrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-26 06:25
Reported
2025-02-26 06:32
Platform
win11-20250217-en
Max time kernel
399s
Max time network
368s
Command Line
Signatures
SilverRat
Silverrat family
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\HP_Drivers\HP_Updates.exe | N/A |
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | discord.com | N/A | N/A |
| N/A | discord.com | N/A | N/A |
Enumerates physical storage devices
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\timeout.exe | N/A |
Scheduled Task/Job: Scheduled Task
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\System32\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\SilverClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\HP_Drivers\HP_Updates.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\HP_Drivers\HP_Updates.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9F4D.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\HP_Drivers\HP_Updates.exe
"C:\Users\Admin\HP_Drivers\HP_Updates.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /query /TN HP_Updates.exe
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /Create /SC ONCE /TN "HP_Updates.exe" /TR "C:\Users\Admin\HP_Drivers\HP_Updates.exe \"\HP_Updates.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /query /TN HP_Updates.exe
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "HP_Updates_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | discord.com | udp |
| US | 162.159.137.232:443 | discord.com | tcp |
Files
memory/5028-0-0x00007FFF6C253000-0x00007FFF6C255000-memory.dmp
memory/5028-1-0x00000000007C0000-0x00000000007D0000-memory.dmp
memory/5028-2-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp
memory/5028-7-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp9F4D.tmp.bat
| MD5 | 58168925dc562a42ac66db33978be0d9 |
| SHA1 | 7378caeae938f8beea60e30498d6210d5307b20f |
| SHA256 | 267730a31294570c6541e2e7844ac50260b7a52ae14def5d3e2a923b8b9b577d |
| SHA512 | 493a8c06b7322b4715ea9140552f3a2aa3f42279526e3c961092da4645cc8401ce56c157c55a349fc4caebdcf30171015d802a79c98cd17303a54dc8a076d618 |
C:\Users\Admin\HP_Drivers\HP_Updates.exe
| MD5 | c312ff9dfd199ae5b504932e018b4d84 |
| SHA1 | 75ff47cc5fb04726d14df93b9c8804360a74f4ad |
| SHA256 | ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97 |
| SHA512 | 94a1e811451022abc9e408c5ede051d9656ce74383455b3ecb897dba9c1abf1bac21447b42ece811845271639de201d780b9aaab594615636fc59538be3684a7 |
memory/3820-12-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp
memory/3820-13-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1sm40r3i.4fd.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/1048-22-0x0000021A46300000-0x0000021A46322000-memory.dmp
memory/3820-25-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp
memory/3820-26-0x00007FFF6C250000-0x00007FFF6CD12000-memory.dmp