silverrat | 2dd5b39bbfc719f6fa1b72bf102a8d38b6423e2661db3be696356b962737738e

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20251211-en
resource tags

arch:x64arch:x86image:win10v2004-20251211-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2025, 07:37

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General

Target
SilverClient.exe
Size 46KB
Sample251214-jfyphaslgl
SHA256 2dd5b39bbfc719f6fa1b72bf102a8d38b6423e2661db3be696356b962737738e
MD5 471c08a82fdc36142cb5ef0501947433
SHA1 7917c7eaccc08f095f3621543e557c14df16a8df
SHA512 2793b119c976b4c4ef68c04b196782567ed9eaf93e650c674fd275bf3882d1d57af1516d7b2c0e5df460f3c935b82d031a82ec4275bf8f26d85a025ee8c8b0c8
SSDEEP 768:n0x4CCKui/50PTsYD3mRUp9f3rHfazB6Saq6IvWafA8GjdW:n0x1XGp9uzoVq6IOafA80W
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

defense_evasion execution silverrat persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

n7xbtfikx.localto.net:8320

Mutex

SilverMutex_ahFqchhdJA

Attributes

certificate
MIIE4DCCAsigAwIBAgIQAKQYOfZd86J2BfNjhG4CWTANBgkqhkiG9w0BAQ0FADARMQ8wDQYDVQQDDAZTaWx2ZXIwIBcNMjIwODI2MTkwMTA4WhgPOTk5OTEyMzEyMzU5NTlaMBExDzANBgNVBAMMBlNpbHZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAPbpOWfhZTuOfEaqqImTTe5dNHAAry7/mf00DCoI4lPZfypsc1tYraxSPFeayGu09a3qdhkWKSVIgwnu2n4GLQNOCY9fh/1oyrX4Iir3BIkYeU7pKTWgjhUlAmFAUAaNr0ca23Ku2kN79jrDzRznOgE2DEW4p7OiM4Mb097ma9lzu7MyssHbY4VCteAhj9HZiplqBxaC1vXDmzxqG+gUZ1aLcyG7ssdkOjtWVBgT3gD/gOl7KchRzCFB1egDC/vD9WZCG35U3Ngi+IkTznoXR1R06cq4v0UnGjE37R2vcB21qb0ZYNiZJXZHv5i9+R7xoPeNoLda5PqnfGGbhPvNEdD56mdcOKlzGIuyemLkUo8texdpiBWKbtc3JZf5VsKxjJtHDK3xW6gDGI+PAirzGkFPmwcf8WgsblvzLg8OZpVxVs8rmKWoi6qIrf4CXnyl73J4lgzW+ir7PjANAQXwLNGdNnvdMeLeo/muGQPdeNpr6OczGGnkWA4qniHeL51/Gx0a8A+jP9zKiyu+qHcsP2IotgWDH/KlzJVr7IAum+DV92uV8poTDcUNcHaKvhHA65KmEtsvLbK6lFZcAMC0eWC0VgpW44T1/16rOaaky5mP6rTMc3nSyOl/lU/XgAgGGQPe22bRLWYzd3WVeEpI1WnHYXS+tL9IOe4kJP+pYsWDAgMBAAGjMjAwMB0GA1UdDgQWBBR32TJj2LeUx9L+RcSOvmFV6VJq6TAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBDQUAA4ICAQA+qucSOi7ov7Q1FmAjMf925KuvKuCNwJiu3Sqo3FDGVAD1fAwAi2FdyuXEO2VIUPZCkalFcBna5rqyrc6tcS4T0IL2TsYLrsuGir7PWP7CAcft1urYS1HpNpHxeH/nixwnQaQs/MuRmdm2TeCj6G21P5BTW55U5y9sMPSYwhbD2N7XLgnSQd5Y+80TR7FUiye/k3D37fI9PRhSQGbfYFRQQTmxj84dPTnY5CVgaY9d8fNiFZkyjaZdf+mibK0xQTf+xLVVj+toDNCkc1F462TdmFhCrHd4PoMo0yLDNv4SC6NLRq4haWDRtORw6gd5GYIoCQ3m3oQvNlNxXhhIjsOyxkxOrkCD0c+57PIc7EmKXieJa/XxnkcIVxO8dvTY/vijuz/VaZYl/lPu9ckuqgJ1wRvvsHl70Trv4Mn4X5uCIqRFFlK/mSOZbLIguGkDN3QIZABvej89vlZMhrVfZOG2oawe23FskHjv7thF/WzOXtWw6RUVC1V+hCwbuxFNUjZmmOTUwdXHnus7I2AuiG6Jz1+y9aYiXBcVTdSljxjHRRmiRaAnY94h58vN8NJ4hKL2GVCo6LxkpuplmcntJN0cKraKTPxSXcCRrqWxX9qoIbfvBcUU4vH1jPJCCLNCuDyD3lgQkpPVvq0EMU1a2HFGgMEQMjpYpb38rcadDhT5ag==
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1449649503429857332/Ow8BGUuwlrDnZiFLWLtfJtdK-g-ywd8TLD0xFoePi1oCtZRPtr2skTIbIKrtli7xnsmi
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
YkpXRVhEa0h4RXRDRU9jYkFuTFR4V0RBRGdBZUhR
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
4
server_signature
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

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1986199681-2542016160-1143148439-1000\Control Panel\International\Geo\Nation	sd.exe

Executes dropped EXE 2 IoCs

pid	Process
5420	sd.exe
5332	sd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3284	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
1	discord.com
2	discord.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4608	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1564	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
4544	SilverClient.exe
3284	powershell.exe
3284	powershell.exe
5420	sd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4544	SilverClient.exe
Token: SeDebugPrivilege	5420	sd.exe
Token: SeDebugPrivilege	3284	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5420	sd.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4544 wrote to memory of 4672	4544	SilverClient.exe	82
PID 4672 wrote to memory of 4608	4672	cmd.exe	84
PID 4672 wrote to memory of 5420	4672	cmd.exe	85
PID 5420 wrote to memory of 5572	5420	sd.exe	86
PID 5420 wrote to memory of 1564	5420	sd.exe	88
PID 5420 wrote to memory of 3380	5420	sd.exe	90
PID 5420 wrote to memory of 3284	5420	sd.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4544
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4672
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4608
- - C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
    "C:\Users\Admin\AppData\Roaming\sdsd\sd.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5420
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN sd.exe
      4⤵
      PID:5572
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "sd.exe" /TR "C:\Users\Admin\AppData\Roaming\sdsd\sd.exe \"\sd.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1564
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN sd.exe
      4⤵
      PID:3380
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3284

C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
1⤵
- Executes dropped EXE
PID:5332

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_gcwxv0c3.ytc.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gcwxv0c3.ytc.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

tmpD62C.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat
Size 151B
SHA256 c41ecb2026dd87fdb3d11004629f7a2669c075ab4bbfee80f1427250d2bc032c
MD5 2728cfed463ae29ab3163af95a33bdaa
SHA1 7b4f0cb5d3188f3b1427aef51fba6062d1f04676
SHA512 718ae50db4c3d68218c4b1ac1284cf538e5ba20097d40aeef7e6cef6e68c724a932ab5bcfe557a69e224b2a40295ce99cfcd8ecc547067abdea722d835e56261
MD5 SHA1 SHA512

Submit Download

sd.exe

Path C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
Size 46KB
SHA256 2dd5b39bbfc719f6fa1b72bf102a8d38b6423e2661db3be696356b962737738e
MD5 471c08a82fdc36142cb5ef0501947433
SHA1 7917c7eaccc08f095f3621543e557c14df16a8df
SHA512 2793b119c976b4c4ef68c04b196782567ed9eaf93e650c674fd275bf3882d1d57af1516d7b2c0e5df460f3c935b82d031a82ec4275bf8f26d85a025ee8c8b0c8
SSDEEP 768:n0x4CCKui/50PTsYD3mRUp9f3rHfazB6Saq6IvWafA8GjdW:n0x1XGp9uzoVq6IOafA80W
MD5 SHA1 SHA512 SSDEEP

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memory/3284-33-0x000002A7B2530000-0x000002A7B254A000-memory.dmp

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memory/3284-29-0x000002A7B24F0000-0x000002A7B250C000-memory.dmp

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memory/3284-11-0x000002A7991C0000-0x000002A7991E2000-memory.dmp

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memory/3284-36-0x000002A7B2520000-0x000002A7B252A000-memory.dmp

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memory/3284-26-0x000002A7B24A0000-0x000002A7B24BC000-memory.dmp

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memory/3284-27-0x000002A7B2830000-0x000002A7B28E5000-memory.dmp

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memory/3284-28-0x000002A7B24C0000-0x000002A7B24CA000-memory.dmp

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memory/3284-35-0x000002A7B2510000-0x000002A7B2516000-memory.dmp

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memory/3284-32-0x000002A7B24D0000-0x000002A7B24DA000-memory.dmp

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memory/3284-34-0x000002A7B24E0000-0x000002A7B24E8000-memory.dmp

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memory/4544-0-0x0000000000B00000-0x0000000000B0E000-memory.dmp

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memory/4544-1-0x0000000001510000-0x0000000001520000-memory.dmp

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memory/5420-10-0x0000000002A90000-0x0000000002AA0000-memory.dmp

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memory/5420-39-0x0000000002A90000-0x0000000002AA0000-memory.dmp

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