silverrat | c9c505c8607cad0f8b787fe677ac182fc697930d9ef1895178c50e4f8d99f0c0 | Triage

Analysis

max time kernel
838s
max time network
839s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/03/2025, 22:10 UTC

Sharing

Report Analysis Logs

General

Target

rat/SilverClient - Copy (15).exe
Size

43KB
MD5

44a5ff2feda2634ae7d9fadc97ebd0a0
SHA1

9a763aefd806585e11a36203e575ae142f38bc6c
SHA256

5dde6801897a7d76c16e64c0b36a3280fbf5371642a690b85ddd31538c4458d8
SHA512

cebc24998c33d7fe8bcdba5183d60c36b3ccaac247d0ee206a73485236453c109dc269522df01d85f58efd3d7a28358221f2139f11356f95f9b8283475f576ca
SSDEEP

768:GdmcASe38zJ/Ol6IoZmtPHJm7+avCJ8eEPNRULQD9PUGa7AB6Sh/lE:GdmcASeuOtvhmeZKNGsD9pYAoS/lE

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

if-eventually.gl.at.ply.gg:17094

Mutex

Mutex_DthEiIseBZ

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
eGlwZU1BZVJwdkFBdllxYmdRQUJ2eWtsbVVURFhE
reconnect_delay
0
server_signature
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

Signatures

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

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

defense_evasion

Hidden Files and Directories

pid	Process
2292	attrib.exe
1632	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1820	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
1560	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\SysTemp64\\$77Runtime Broker.exe\""	SilverClient - Copy (15).exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

PowerShell

pid	Process
2676	powershell.exe

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
2120	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

pid	Process
1828	schtasks.exe
1612	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2496	SilverClient - Copy (15).exe
2496	SilverClient - Copy (15).exe
2496	SilverClient - Copy (15).exe
1820	$77Runtime Broker.exe
2676	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2160	vssvc.exe
Token: SeRestorePrivilege	2160	vssvc.exe
Token: SeAuditPrivilege	2160	vssvc.exe
Token: SeDebugPrivilege	2496	SilverClient - Copy (15).exe
Token: SeDebugPrivilege	1820	$77Runtime Broker.exe
Token: SeDebugPrivilege	2676	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1820	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 2292	2496	SilverClient - Copy (15).exe	34
PID 2496 wrote to memory of 2292	2496	SilverClient - Copy (15).exe	34
PID 2496 wrote to memory of 2292	2496	SilverClient - Copy (15).exe	34
PID 2496 wrote to memory of 1632	2496	SilverClient - Copy (15).exe	36
PID 2496 wrote to memory of 1632	2496	SilverClient - Copy (15).exe	36
PID 2496 wrote to memory of 1632	2496	SilverClient - Copy (15).exe	36
PID 2496 wrote to memory of 1560	2496	SilverClient - Copy (15).exe	39
PID 2496 wrote to memory of 1560	2496	SilverClient - Copy (15).exe	39
PID 2496 wrote to memory of 1560	2496	SilverClient - Copy (15).exe	39
PID 1560 wrote to memory of 2120	1560	cmd.exe	41
PID 1560 wrote to memory of 2120	1560	cmd.exe	41
PID 1560 wrote to memory of 2120	1560	cmd.exe	41
PID 1560 wrote to memory of 1820	1560	cmd.exe	42
PID 1560 wrote to memory of 1820	1560	cmd.exe	42
PID 1560 wrote to memory of 1820	1560	cmd.exe	42
PID 1820 wrote to memory of 2196	1820	$77Runtime Broker.exe	44
PID 1820 wrote to memory of 2196	1820	$77Runtime Broker.exe	44
PID 1820 wrote to memory of 2196	1820	$77Runtime Broker.exe	44
PID 1820 wrote to memory of 1612	1820	$77Runtime Broker.exe	46
PID 1820 wrote to memory of 1612	1820	$77Runtime Broker.exe	46
PID 1820 wrote to memory of 1612	1820	$77Runtime Broker.exe	46
PID 1820 wrote to memory of 812	1820	$77Runtime Broker.exe	48
PID 1820 wrote to memory of 812	1820	$77Runtime Broker.exe	48
PID 1820 wrote to memory of 812	1820	$77Runtime Broker.exe	48
PID 1820 wrote to memory of 2676	1820	$77Runtime Broker.exe	50
PID 1820 wrote to memory of 2676	1820	$77Runtime Broker.exe	50
PID 1820 wrote to memory of 2676	1820	$77Runtime Broker.exe	50
PID 1820 wrote to memory of 1828	1820	$77Runtime Broker.exe	52
PID 1820 wrote to memory of 1828	1820	$77Runtime Broker.exe	52
PID 1820 wrote to memory of 1828	1820	$77Runtime Broker.exe	52

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
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

pid	Process
2292	attrib.exe
1632	attrib.exe

C:\Users\Admin\AppData\Local\Temp\rat\SilverClient - Copy (15).exe
"C:\Users\Admin\AppData\Local\Temp\rat\SilverClient - Copy (15).exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2292
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64\$77Runtime Broker.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1632
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDE5E.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1560
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2120
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64\$77Runtime Broker.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64\$77Runtime Broker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1820
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2196
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Runtime Broker.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64\$77Runtime Broker.exe \"\$77Runtime Broker.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1612
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:812
  - - 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:2676
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "Runtime Broker_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1828

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2160

Network

DNS

if-eventually.gl.at.ply.gg

$77Runtime Broker.exe

Remote address:

8.8.8.8:53

Request

if-eventually.gl.at.ply.gg

IN A

Response

if-eventually.gl.at.ply.gg

IN A

147.185.221.25

147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

3.6kB
7.7kB
41
35
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

432 B
132 B
4
3

8.8.8.8:53

if-eventually.gl.at.ply.gg

dns

$77Runtime Broker.exe

72 B
88 B
1
1

DNS Request

if-eventually.gl.at.ply.gg

DNS Response

147.185.221.25

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

PowerShell

Scheduled Task/Job

Scheduled Task

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Scheduled Task

Defense Evasion

Hide Artifacts

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpDE5E.tmp.bat

Filesize
199B

MD5
b7fe6c6244745b094b3c5050e6d45a9e

SHA1
e3d820e0771786b17a26528f28321b2da09761ec

SHA256
3a71e0077d8a4998afd4da8c4d0d27f97efbbe59517d99e070b692f71655b275

SHA512
3417b1fc33d9884c1626f5c59a453c3f4afb9cc9d803ec5044a77100a52cad0db4d2475ff133ce887a5f6ff7331701a4b809168f3a9b1b7b8860335d717c768a

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysTemp64\$77Runtime Broker.exe

Filesize
43KB

MD5
44a5ff2feda2634ae7d9fadc97ebd0a0

SHA1
9a763aefd806585e11a36203e575ae142f38bc6c

SHA256
5dde6801897a7d76c16e64c0b36a3280fbf5371642a690b85ddd31538c4458d8

SHA512
cebc24998c33d7fe8bcdba5183d60c36b3ccaac247d0ee206a73485236453c109dc269522df01d85f58efd3d7a28358221f2139f11356f95f9b8283475f576ca

Download Submit
memory/1820-19-0x000000013F930000-0x000000013F940000-memory.dmp

Filesize
64KB

Download
memory/2496-0-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2496-1-0x000000013F120000-0x000000013F130000-memory.dmp

Filesize
64KB

Download
memory/2496-2-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2496-3-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2496-4-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2496-14-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2676-24-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2676-25-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

Filesize
32KB

Download