silverrat | 2dd5b39bbfc719f6fa1b72bf102a8d38b6423e2661db3be696356b962737738e

Analysis

max time kernel
149s
max time network
155s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-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
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
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
wdAHTuc/WDln/6w8wy64q/HSc+xjaX3om99wIvP8Ysi5+cLUsDIsvDblGoP7c/83OWoAyzQvUI8VzHvpLz7BeAp0MNsVnEvZMhNcuwpbWwQ4IEPnWRBsOP/szrHCeY8a3g6Whv46fzcJUkmauE5rBOe71d6KB38+3D3RLesOwN9KG+4Wb8Gf7qeH8oTiqbEBvbsomSvd4NDnw+oJhXXSvDlB8M5tKasQhtWY8YgJ9tyLlYWSV+ALZgclU+Xp9IwRl7i2mgYNjUsHm6pK12x0tmSVQZZK3Cs8o/rIHC2xe8Rza8jhtt+RW90k8HAgjCjmXa+CYgtLSa/hZLaR65NUF+FrEjY14J7NzovhyECuQhev6Twrkd+yMIbL00+kKb18a4FWkmSabsPSuAgHXZh/YyCQkTAEgcpHU4J3eYfMPUkKVAYOZuwLWzmlNVIsIDwZ79HaiLBWsg7lzImjFzQxepM6zv3RdI8gyUYZ+2pDD268DzI30ZxAn5FQjaoRYJDavPUQCwdyjpheyv/B6c7gQrxMF2sw1YqvdnESdHhkOXCX/eOjsjvcoW66pom/wutc/I2FHg/rQ/w0JibEGoUd5HNrZyjbNYhPJQKJrexlOhuS+VilkQiDFS5/Biv/Nitk3dWptQs1Gbe9zNJnSWyLkIRs+gIvTVUwByo5CMoyWlk=

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
6116	sd.exe
5064	sd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3152	powershell.exe

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

Web Service

T1102

flow	ioc
2	discord.com
1	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
3288	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
896	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
2432	SilverClient.exe
3152	powershell.exe
3152	powershell.exe
6116	sd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	SilverClient.exe
Token: SeDebugPrivilege	6116	sd.exe
Token: SeDebugPrivilege	3152	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
6116	sd.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 5732	2432	SilverClient.exe	79
PID 5732 wrote to memory of 3288	5732	cmd.exe	81
PID 5732 wrote to memory of 6116	5732	cmd.exe	82
PID 6116 wrote to memory of 1780	6116	sd.exe	83
PID 6116 wrote to memory of 896	6116	sd.exe	85
PID 6116 wrote to memory of 5644	6116	sd.exe	87
PID 6116 wrote to memory of 3152	6116	sd.exe	89

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:2432
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4AA5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5732
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3288
- - C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
    "C:\Users\Admin\AppData\Roaming\sdsd\sd.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:6116
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN sd.exe
      4⤵
      PID:1780
  - - 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:896
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN sd.exe
      4⤵
      PID:5644
  - - 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:3152

C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
C:\Users\Admin\AppData\Roaming\sdsd\sd.exe
1⤵
- Executes dropped EXE
PID:5064

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_pl2uxotg.sx3.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pl2uxotg.sx3.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

tmp4AA5.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4AA5.tmp.bat
Size 151B
SHA256 d274e184eb9edea4edbb2105c9e0eea995a2cffcc5a1809f62c917d0933b435b
MD5 bd31ec0b57a619d8f317f238abcd8380
SHA1 2353f6519f008129fd1d75835db480c1bae1a8b8
SHA512 1244b211abba33126514451cf09513a8fc95ac90698f1ac3f350af8be6611d656a1d84605d73a8f8ae62d55c481178d689441f73e4c6f0ca55ffa05f5d46ccfc
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/2432-1-0x0000000002BA0000-0x0000000002BB0000-memory.dmp

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memory/2432-0-0x0000000000070000-0x000000000007E000-memory.dmp

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memory/3152-31-0x000001E3D8B90000-0x000001E3D8BAA000-memory.dmp

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memory/3152-12-0x000001E3D8A70000-0x000001E3D8A92000-memory.dmp

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memory/3152-24-0x000001E3D8B00000-0x000001E3D8B1C000-memory.dmp

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memory/3152-25-0x000001E3D8DE0000-0x000001E3D8E93000-memory.dmp

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memory/3152-26-0x000001E3D8B20000-0x000001E3D8B2A000-memory.dmp

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memory/3152-27-0x000001E3D8B50000-0x000001E3D8B6C000-memory.dmp

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memory/3152-29-0x000001E3D8B30000-0x000001E3D8B3A000-memory.dmp

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memory/3152-32-0x000001E3D8B40000-0x000001E3D8B48000-memory.dmp

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memory/3152-33-0x000001E3D8B70000-0x000001E3D8B76000-memory.dmp

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memory/3152-34-0x000001E3D8B80000-0x000001E3D8B8A000-memory.dmp

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memory/6116-10-0x000000001DAB0000-0x000000001DAC0000-memory.dmp

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memory/6116-37-0x000000001DAB0000-0x000000001DAC0000-memory.dmp

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