Analysis Overview
SHA256
b14dd531276f22ac62afb5d14aa2016b832dfa770ec973b1c92cc4b7b2faff89
Threat Level: Known bad
The file SilverClient.exe was found to be: Known bad.
Malicious Activity Summary
SilverRat
Silverrat family
Sets file to hidden
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Command and Scripting Interpreter: PowerShell
Unsigned PE
Enumerates physical storage devices
Views/modifies file attributes
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Delays execution with timeout.exe
Scheduled Task/Job: Scheduled Task
Uses Task Scheduler COM API
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-19 03:42
Signatures
Silverrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-19 03:42
Reported
2025-02-19 03:49
Platform
win7-20241010-en
Max time kernel
118s
Max time network
148s
Command Line
Signatures
SilverRat
Silverrat family
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\scvhostDir\$77scvhost.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\cmd.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\scvhostDir\\$77scvhost.exe\"" | C:\Users\Admin\AppData\Local\Temp\SilverClient.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 |
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 |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\SilverClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\SilverClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\SilverClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\scvhostDir\$77scvhost.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
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\scvhostDir\$77scvhost.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\scvhostDir\$77scvhost.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
C:\Windows\System32\attrib.exe
"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\scvhostDir"
C:\Windows\System32\attrib.exe
"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\scvhostDir\$77scvhost.exe"
C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8F64.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\scvhostDir\$77scvhost.exe
"C:\Users\Admin\scvhostDir\$77scvhost.exe"
C:\Windows\system32\schtasks.exe
"schtasks.exe" /query /TN $77scvhost.exe
C:\Windows\system32\schtasks.exe
"schtasks.exe" /Create /SC ONCE /TN "$77scvhost.exe" /TR "C:\Users\Admin\scvhostDir\$77scvhost.exe \"\$77scvhost.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
C:\Windows\system32\schtasks.exe
"schtasks.exe" /query /TN $77scvhost.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
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | understanding-described.gl.at.ply.gg | udp |
| US | 147.185.221.25:3953 | understanding-described.gl.at.ply.gg | tcp |
Files
memory/2204-0-0x000007FEF6503000-0x000007FEF6504000-memory.dmp
memory/2204-1-0x000000013F520000-0x000000013F530000-memory.dmp
memory/2204-2-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp
memory/2204-3-0x000007FEF6503000-0x000007FEF6504000-memory.dmp
memory/2204-4-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp8F64.tmp.bat
| MD5 | 32f9aca6a9e15ee06b4a15b7a637195a |
| SHA1 | 173685dcd71c39772c9e3356e7a0f6b38cc0c146 |
| SHA256 | d14f6acabfc87f32d83670d4a69258261fc56611730129fcc3a3ea0e06ca6b11 |
| SHA512 | 9bd5791eba8e73ee5617b2a59285b5f2b14241328b8cf5dc304b0927ba1acc4ad3e003b0fa5a404cc91b7c1a727a0027e4d2ac97c3175b0f9dda39c80cbf8f28 |
memory/2204-14-0x000007FEF6500000-0x000007FEF6EEC000-memory.dmp
\Users\Admin\scvhostDir\$77scvhost.exe
| MD5 | 052e48af174b38e7a2c2b08f111435bb |
| SHA1 | 56b2d3da6b5563abafbaffde611c299cba22a4a2 |
| SHA256 | b14dd531276f22ac62afb5d14aa2016b832dfa770ec973b1c92cc4b7b2faff89 |
| SHA512 | 94040a9038cfc64f489ef749837743be69a1b5f2066a9cdc99a68087979cc73d3db34924f0ae8e0ff293f6f780646fe76147876b5e562ef4a836d16ce2812ca5 |
memory/2932-19-0x000000013F5F0000-0x000000013F600000-memory.dmp
memory/1928-24-0x000000001B320000-0x000000001B602000-memory.dmp
memory/1928-25-0x0000000001F40000-0x0000000001F48000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\CabAD42.tmp
| MD5 | 49aebf8cbd62d92ac215b2923fb1b9f5 |
| SHA1 | 1723be06719828dda65ad804298d0431f6aff976 |
| SHA256 | b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f |
| SHA512 | bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b |
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-19 03:42
Reported
2025-02-19 03:45
Platform
win10v2004-20250217-en
Max time kernel
92s
Max time network
146s
Command Line
Signatures
SilverRat
Silverrat family
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\SilverClient.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\scvhostDir\$77scvhost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\scvhostDir\$77scvhost.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\scvhostDir\\$77scvhost.exe\"" | C:\Users\Admin\AppData\Local\Temp\SilverClient.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 |
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 |
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\scvhostDir\$77scvhost.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\scvhostDir\$77scvhost.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
| N/A | N/A | C:\Windows\System32\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
C:\Windows\System32\attrib.exe
"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\scvhostDir"
C:\Windows\System32\attrib.exe
"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\scvhostDir\$77scvhost.exe"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEB1.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\scvhostDir\$77scvhost.exe
"C:\Users\Admin\scvhostDir\$77scvhost.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /query /TN $77scvhost.exe
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /Create /SC ONCE /TN "$77scvhost.exe" /TR "C:\Users\Admin\scvhostDir\$77scvhost.exe \"\$77scvhost.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
C:\Windows\SYSTEM32\schtasks.exe
"schtasks.exe" /query /TN $77scvhost.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
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | understanding-described.gl.at.ply.gg | udp |
| US | 147.185.221.25:3953 | understanding-described.gl.at.ply.gg | tcp |
Files
memory/8-0-0x00007FFA0C623000-0x00007FFA0C625000-memory.dmp
memory/8-1-0x00000000005A0000-0x00000000005B0000-memory.dmp
memory/8-2-0x00007FFA0C620000-0x00007FFA0D0E1000-memory.dmp
memory/8-3-0x00007FFA0C620000-0x00007FFA0D0E1000-memory.dmp
memory/8-9-0x00007FFA0C620000-0x00007FFA0D0E1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmpEB1.tmp.bat
| MD5 | 547198110958e4d4207b23aa16a24170 |
| SHA1 | 2818498fb14da427c6f6ff34fd8ec2e0830c9da5 |
| SHA256 | f051ba3cfc5b249966e34f43d04c3703f61d3b4887f66b1167231f6671ffe0ea |
| SHA512 | 0918ee0fcfc9ecff589a1a928ebb557d7308755815acce18762d4a9cda7fc2ab2116eb7f75e72d55e70e98e628269c1b522e8cce35886e581431b6d9d633d793 |
C:\Users\Admin\scvhostDir\$77scvhost.exe
| MD5 | 052e48af174b38e7a2c2b08f111435bb |
| SHA1 | 56b2d3da6b5563abafbaffde611c299cba22a4a2 |
| SHA256 | b14dd531276f22ac62afb5d14aa2016b832dfa770ec973b1c92cc4b7b2faff89 |
| SHA512 | 94040a9038cfc64f489ef749837743be69a1b5f2066a9cdc99a68087979cc73d3db34924f0ae8e0ff293f6f780646fe76147876b5e562ef4a836d16ce2812ca5 |
memory/4384-13-0x00007FFA0C620000-0x00007FFA0D0E1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gjdk5mt5.ymc.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/4840-19-0x0000026BF3D40000-0x0000026BF3D62000-memory.dmp
memory/4384-26-0x00007FFA0C620000-0x00007FFA0D0E1000-memory.dmp