silverrat | c9c505c8607cad0f8b787fe677ac182fc697930d9ef1895178c50e4f8d99f0c0 | Triage

Analysis

max time kernel
124s
max time network
140s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/03/2025, 22:11 UTC

Sharing

Report Analysis Logs

General

Target

rat/SilverClient - Copy (13).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
2732	attrib.exe
2900	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
536	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
2896	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 (13).exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

PowerShell

pid	Process
1948	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
1064	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
2992	schtasks.exe
2152	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2412	SilverClient - Copy (13).exe
2412	SilverClient - Copy (13).exe
2412	SilverClient - Copy (13).exe
536	$77Runtime Broker.exe
1948	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2556	vssvc.exe
Token: SeRestorePrivilege	2556	vssvc.exe
Token: SeAuditPrivilege	2556	vssvc.exe
Token: SeDebugPrivilege	2412	SilverClient - Copy (13).exe
Token: SeDebugPrivilege	536	$77Runtime Broker.exe
Token: SeDebugPrivilege	1948	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
536	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 2732	2412	SilverClient - Copy (13).exe	34
PID 2412 wrote to memory of 2732	2412	SilverClient - Copy (13).exe	34
PID 2412 wrote to memory of 2732	2412	SilverClient - Copy (13).exe	34
PID 2412 wrote to memory of 2900	2412	SilverClient - Copy (13).exe	36
PID 2412 wrote to memory of 2900	2412	SilverClient - Copy (13).exe	36
PID 2412 wrote to memory of 2900	2412	SilverClient - Copy (13).exe	36
PID 2412 wrote to memory of 2896	2412	SilverClient - Copy (13).exe	39
PID 2412 wrote to memory of 2896	2412	SilverClient - Copy (13).exe	39
PID 2412 wrote to memory of 2896	2412	SilverClient - Copy (13).exe	39
PID 2896 wrote to memory of 1064	2896	cmd.exe	41
PID 2896 wrote to memory of 1064	2896	cmd.exe	41
PID 2896 wrote to memory of 1064	2896	cmd.exe	41
PID 2896 wrote to memory of 536	2896	cmd.exe	42
PID 2896 wrote to memory of 536	2896	cmd.exe	42
PID 2896 wrote to memory of 536	2896	cmd.exe	42
PID 536 wrote to memory of 2088	536	$77Runtime Broker.exe	44
PID 536 wrote to memory of 2088	536	$77Runtime Broker.exe	44
PID 536 wrote to memory of 2088	536	$77Runtime Broker.exe	44
PID 536 wrote to memory of 2992	536	$77Runtime Broker.exe	46
PID 536 wrote to memory of 2992	536	$77Runtime Broker.exe	46
PID 536 wrote to memory of 2992	536	$77Runtime Broker.exe	46
PID 536 wrote to memory of 1928	536	$77Runtime Broker.exe	48
PID 536 wrote to memory of 1928	536	$77Runtime Broker.exe	48
PID 536 wrote to memory of 1928	536	$77Runtime Broker.exe	48
PID 536 wrote to memory of 1948	536	$77Runtime Broker.exe	50
PID 536 wrote to memory of 1948	536	$77Runtime Broker.exe	50
PID 536 wrote to memory of 1948	536	$77Runtime Broker.exe	50
PID 536 wrote to memory of 2152	536	$77Runtime Broker.exe	52
PID 536 wrote to memory of 2152	536	$77Runtime Broker.exe	52
PID 536 wrote to memory of 2152	536	$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
2732	attrib.exe
2900	attrib.exe

C:\Users\Admin\AppData\Local\Temp\rat\SilverClient - Copy (13).exe
"C:\Users\Admin\AppData\Local\Temp\rat\SilverClient - Copy (13).exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2412
- 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:2732
- 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:2900
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpAC.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1064
- - 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:536
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2088
  - - 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:2992
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:1928
  - - 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:1948
  - - 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:2152

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2556

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

1.5kB
3.0kB
15
13
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

1.5kB
52 B
11
1
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

954 B
52 B
9
1
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

950 B
52 B
9
1
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

954 B
52 B
9
1
147.185.221.25:17094

if-eventually.gl.at.ply.gg

tls

$77Runtime Broker.exe

1.4kB
4.2kB
13
11

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
71KB

MD5
83142242e97b8953c386f988aa694e4a

SHA1
833ed12fc15b356136dcdd27c61a50f59c5c7d50

SHA256
d72761e1a334a754ce8250e3af7ea4bf25301040929fd88cf9e50b4a9197d755

SHA512
bb6da177bd16d163f377d9b4c63f6d535804137887684c113cc2f643ceab4f34338c06b5a29213c23d375e95d22ef417eac928822dfb3688ce9e2de9d5242d10

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar8D0A.tmp

Filesize
183KB

MD5
109cab5505f5e065b63d01361467a83b

SHA1
4ed78955b9272a9ed689b51bf2bf4a86a25e53fc

SHA256
ea6b7f51e85835c09259d9475a7d246c3e764ad67c449673f9dc97172c351673

SHA512
753a6da5d6889dd52f40208e37f2b8c185805ef81148682b269fff5aa84a46d710fe0ebfe05bce625da2e801e1c26745998a41266fa36bf47bc088a224d730cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpAC.tmp.bat

Filesize
197B

MD5
d98256a1320941608230d3af2919e5fd

SHA1
23ebb396da69e2e6d413de5b15c663fa7520b56b

SHA256
5b75e34100bdcee7e5335a57cc896971000b68c07883cb0cf4745a47a114f1d1

SHA512
2cf75e0691411669cfb4c8b77a2fe07c7a8042102f56eda57ec815e6b8413c56f09eada3203edf513ab530833e7096872d4e1b9fdfc9ab63ea4e8c03e21be7c1

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/536-19-0x000000013F760000-0x000000013F770000-memory.dmp

Filesize
64KB

Download
memory/1948-25-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/1948-24-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2412-3-0x000007FEF5283000-0x000007FEF5284000-memory.dmp

Filesize
4KB

Download
memory/2412-14-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-4-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-0-0x000007FEF5283000-0x000007FEF5284000-memory.dmp

Filesize
4KB

Download
memory/2412-2-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-1-0x000000013FDF0000-0x000000013FE00000-memory.dmp

Filesize
64KB

Download