silverrat | 2259e06eccb55249f28af3b1bd022a7843de21eb51fabd61f01f158a20fdfe96

Analysis

max time kernel
836s
max time network
838s
platform
windows7_x64
resource
win7-20240903-ja
resource tags

arch:x64arch:x86image:win7-20240903-jalocale:ja-jpos:windows7-x64systemwindows
submitted
08/03/2025, 20:02

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General

Target

BOB SILVER CLIENTS GO BRRRRR/V 14.exe
Size

45KB
MD5

1cf8d6e0acaa084d9b4201f11a1a04a8
SHA1

7cc576ff7a096e14a6e83836bfd3cd29f7164392
SHA256

c7c78f431c21c05d2963fb7635b73d969b7dada294252ef1d2b634b030a2375f
SHA512

de6889cffba397b9a95b02d3271b14c9abbe543fb2a4415182cb24e9a3cf152bfb1ae5d3237eacac613f411fc278d120191f45c5cb1c4ca5135f393b57c0527a
SSDEEP

768:iqzAMCV2799XtzcyyMjtjRULQD9PpnUz1QB6S9RVvr0/bE:iqzAM8qfzcMjGsD9K1QoyRVA/bE

Score

10^/10

silverrat defense_evasion execution 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
1072	attrib.exe
2860	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1248	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
2912	cmd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1052	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
2904	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
1420	schtasks.exe
580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
852	V 14.exe
852	V 14.exe
852	V 14.exe
1052	powershell.exe
1248	$77Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2308	vssvc.exe
Token: SeRestorePrivilege	2308	vssvc.exe
Token: SeAuditPrivilege	2308	vssvc.exe
Token: SeDebugPrivilege	852	V 14.exe
Token: SeDebugPrivilege	1248	$77Runtime Broker.exe
Token: SeDebugPrivilege	1052	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1248	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 1072	852	V 14.exe	34
PID 852 wrote to memory of 1072	852	V 14.exe	34
PID 852 wrote to memory of 1072	852	V 14.exe	34
PID 852 wrote to memory of 2860	852	V 14.exe	36
PID 852 wrote to memory of 2860	852	V 14.exe	36
PID 852 wrote to memory of 2860	852	V 14.exe	36
PID 852 wrote to memory of 2912	852	V 14.exe	39
PID 852 wrote to memory of 2912	852	V 14.exe	39
PID 852 wrote to memory of 2912	852	V 14.exe	39
PID 2912 wrote to memory of 2904	2912	cmd.exe	41
PID 2912 wrote to memory of 2904	2912	cmd.exe	41
PID 2912 wrote to memory of 2904	2912	cmd.exe	41
PID 2912 wrote to memory of 1248	2912	cmd.exe	42
PID 2912 wrote to memory of 1248	2912	cmd.exe	42
PID 2912 wrote to memory of 1248	2912	cmd.exe	42
PID 1248 wrote to memory of 2316	1248	$77Runtime Broker.exe	44
PID 1248 wrote to memory of 2316	1248	$77Runtime Broker.exe	44
PID 1248 wrote to memory of 2316	1248	$77Runtime Broker.exe	44
PID 1248 wrote to memory of 1420	1248	$77Runtime Broker.exe	46
PID 1248 wrote to memory of 1420	1248	$77Runtime Broker.exe	46
PID 1248 wrote to memory of 1420	1248	$77Runtime Broker.exe	46
PID 1248 wrote to memory of 2480	1248	$77Runtime Broker.exe	48
PID 1248 wrote to memory of 2480	1248	$77Runtime Broker.exe	48
PID 1248 wrote to memory of 2480	1248	$77Runtime Broker.exe	48
PID 1248 wrote to memory of 1052	1248	$77Runtime Broker.exe	50
PID 1248 wrote to memory of 1052	1248	$77Runtime Broker.exe	50
PID 1248 wrote to memory of 1052	1248	$77Runtime Broker.exe	50
PID 1248 wrote to memory of 580	1248	$77Runtime Broker.exe	52
PID 1248 wrote to memory of 580	1248	$77Runtime Broker.exe	52
PID 1248 wrote to memory of 580	1248	$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
1072	attrib.exe
2860	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 14.exe
"C:\Users\Admin\AppData\Local\Temp\BOB SILVER CLIENTS GO BRRRRR\V 14.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:852
- 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:1072
- 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:2860
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE0ED.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2904
- - 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:1248
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2316
  - - 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:1420
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2480
  - - 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:1052
  - - 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:580

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2308

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

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE0ED.tmp.bat

Filesize
197B

MD5
4e23cf5af7b886a54781450f830d7324

SHA1
6505fa0d6f7009d90bfdadf02d865238a440c736

SHA256
e986ba3a7cc8b3dfa06321cd4662dfca9f28ad8be0a225b6913124a7e5f6e3bd

SHA512
8821cf078e7a05d66aefbb6ec4681f61abf74e9d7d7e533c41dcd6ccc795780982b1b66d97209aa2da914e9434a5c9935a8787f41b4b0cd475d7d1170e43947a

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/852-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

Filesize
4KB

Download
memory/852-1-0x000000013FA50000-0x000000013FA60000-memory.dmp

Filesize
64KB

Download
memory/852-2-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/852-3-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

Filesize
4KB

Download
memory/852-4-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/852-14-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Filesize
9.9MB

Download
memory/1052-27-0x000000001B4F0000-0x000000001B540000-memory.dmp

Filesize
320KB

Download
memory/1052-24-0x000000001B1C0000-0x000000001B4A2000-memory.dmp

Filesize
2.9MB

Download
memory/1052-25-0x00000000024C0000-0x00000000024C8000-memory.dmp

Filesize
32KB

Download
memory/1052-26-0x0000000002820000-0x0000000002830000-memory.dmp

Filesize
64KB

Download
memory/1052-28-0x000000001B120000-0x000000001B12A000-memory.dmp

Filesize
40KB

Download
memory/1052-29-0x000000001B130000-0x000000001B138000-memory.dmp

Filesize
32KB

Download
memory/1052-30-0x000000001B9E0000-0x000000001BA38000-memory.dmp

Filesize
352KB

Download
memory/1248-19-0x000000013F8D0000-0x000000013F8E0000-memory.dmp

Filesize
64KB

Download