silverrat | 2259e06eccb55249f28af3b1bd022a7843de21eb51fabd61f01f158a20fdfe96

Analysis

max time kernel
148s
max time network
157s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08/03/2025, 20:09

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General

Target

BOB SILVER CLIENTS GO BRRRRR/V 18.exe
Size

45KB
MD5

1cf8d6e0acaa084d9b4201f11a1a04a8
SHA1

7cc576ff7a096e14a6e83836bfd3cd29f7164392
SHA256

c7c78f431c21c05d2963fb7635b73d969b7dada294252ef1d2b634b030a2375f
SHA512

de6889cffba397b9a95b02d3271b14c9abbe543fb2a4415182cb24e9a3cf152bfb1ae5d3237eacac613f411fc278d120191f45c5cb1c4ca5135f393b57c0527a
SSDEEP

768:iqzAMCV2799XtzcyyMjtjRULQD9PpnUz1QB6S9RVvr0/bE:iqzAM8qfzcMjGsD9K1QoyRVA/bE

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

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

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1335679503938355221/lGcOUDspps04wapqxq013W8uYGPSCcmnxl9Q1xnWdBn45Ul8QBT-Qs2mjsdVNXfOtTCe
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
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

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2576	attrib.exe
1744	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1236	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
2900	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\WinTask\\$77Runtime Broker.exe\""	V 18.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2172	powershell.exe

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

Web Service

T1102

flow	ioc
4	discord.com
5	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
1244	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

T1053.005

pid	Process
764	schtasks.exe
1864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3004	V 18.exe
3004	V 18.exe
3004	V 18.exe
2172	powershell.exe
1236	$77Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2808	vssvc.exe
Token: SeRestorePrivilege	2808	vssvc.exe
Token: SeAuditPrivilege	2808	vssvc.exe
Token: SeDebugPrivilege	3004	V 18.exe
Token: SeDebugPrivilege	1236	$77Runtime Broker.exe
Token: SeDebugPrivilege	2172	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1236	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2576	3004	V 18.exe	34
PID 3004 wrote to memory of 2576	3004	V 18.exe	34
PID 3004 wrote to memory of 2576	3004	V 18.exe	34
PID 3004 wrote to memory of 1744	3004	V 18.exe	36
PID 3004 wrote to memory of 1744	3004	V 18.exe	36
PID 3004 wrote to memory of 1744	3004	V 18.exe	36
PID 3004 wrote to memory of 2900	3004	V 18.exe	39
PID 3004 wrote to memory of 2900	3004	V 18.exe	39
PID 3004 wrote to memory of 2900	3004	V 18.exe	39
PID 2900 wrote to memory of 1244	2900	cmd.exe	41
PID 2900 wrote to memory of 1244	2900	cmd.exe	41
PID 2900 wrote to memory of 1244	2900	cmd.exe	41
PID 2900 wrote to memory of 1236	2900	cmd.exe	42
PID 2900 wrote to memory of 1236	2900	cmd.exe	42
PID 2900 wrote to memory of 1236	2900	cmd.exe	42
PID 1236 wrote to memory of 2240	1236	$77Runtime Broker.exe	44
PID 1236 wrote to memory of 2240	1236	$77Runtime Broker.exe	44
PID 1236 wrote to memory of 2240	1236	$77Runtime Broker.exe	44
PID 1236 wrote to memory of 764	1236	$77Runtime Broker.exe	46
PID 1236 wrote to memory of 764	1236	$77Runtime Broker.exe	46
PID 1236 wrote to memory of 764	1236	$77Runtime Broker.exe	46
PID 1236 wrote to memory of 2948	1236	$77Runtime Broker.exe	48
PID 1236 wrote to memory of 2948	1236	$77Runtime Broker.exe	48
PID 1236 wrote to memory of 2948	1236	$77Runtime Broker.exe	48
PID 1236 wrote to memory of 2172	1236	$77Runtime Broker.exe	50
PID 1236 wrote to memory of 2172	1236	$77Runtime Broker.exe	50
PID 1236 wrote to memory of 2172	1236	$77Runtime Broker.exe	50
PID 1236 wrote to memory of 1864	1236	$77Runtime Broker.exe	52
PID 1236 wrote to memory of 1864	1236	$77Runtime Broker.exe	52
PID 1236 wrote to memory of 1864	1236	$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

T1564.001

pid	Process
2576	attrib.exe
1744	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 18.exe
"C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 18.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2576
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1744
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp16DB.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1244
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1236
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2240
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Runtime Broker.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WinTask\$77Runtime Broker.exe \"\$77Runtime Broker.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:764
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2948
  - - 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:2172
  - - 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:1864

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

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

C:\Users\Admin\AppData\Local\Temp\tmp16DB.tmp.bat

Filesize
197B

MD5
7c0b5b4ce159eba23c9b9c65ce8e1311

SHA1
a3b543d36bf96d68465af8fdfd1d101471347f97

SHA256
87e0f79295db1be6f2ae185c169473c671b12ed7ba142988e8037e51321ebdac

SHA512
58437ff426dc1b57ff5b3ea77b35f744c3c527025c261e9830972903035ee8d947a2f4e411bd65d1aec86d452f694a94582643f1ce0f9e763d2c114abcf0dec1

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

Filesize
45KB

MD5
1cf8d6e0acaa084d9b4201f11a1a04a8

SHA1
7cc576ff7a096e14a6e83836bfd3cd29f7164392

SHA256
c7c78f431c21c05d2963fb7635b73d969b7dada294252ef1d2b634b030a2375f

SHA512
de6889cffba397b9a95b02d3271b14c9abbe543fb2a4415182cb24e9a3cf152bfb1ae5d3237eacac613f411fc278d120191f45c5cb1c4ca5135f393b57c0527a

Download Submit
memory/1236-19-0x000000013F8C0000-0x000000013F8D0000-memory.dmp

Filesize
64KB

Download
memory/2172-24-0x000000001B4B0000-0x000000001B792000-memory.dmp

Filesize
2.9MB

Download
memory/2172-25-0x00000000022A0000-0x00000000022A8000-memory.dmp

Filesize
32KB

Download
memory/3004-0-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/3004-1-0x000000013F1C0000-0x000000013F1D0000-memory.dmp

Filesize
64KB

Download
memory/3004-2-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/3004-3-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/3004-4-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/3004-14-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download