silverrat | 2da1d2b5a84b7124e6a121545e2a113c6fd3176ff6d97e555c422f6cdc9b96db

General

Target

SilverClient.exe
Size

41KB
MD5

3952e9916c90e897f360c6a30467d862
SHA1

860e5ce37398db429528ad2b5f96a3005c65f800
SHA256

2da1d2b5a84b7124e6a121545e2a113c6fd3176ff6d97e555c422f6cdc9b96db
SHA512

43525046bb5601991e18d59922790da01e378102f74bf970c07013f312a7309c146994117dcc35e000c3874dfacd4eefc6c68937800a41555279dafaae02d021
SSDEEP

768:ZpDZ3iKNWP3In15M8w+HR9m1xRUHE9wVdzmgotSB6S/uQ8QrnxUFU:ZpMQQF+xeGk9Ng7oouQ8QxUFU

Score

10^/10

silverrat execution trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

japanese-cross.gl.at.ply.gg:5544

Mutex

SilverMutex_jafRtepbDn

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1321105847064989729/ZxyszSatMIHTaGAl4BDIJjfWgDi3NYjS9MKji0deomNAJsyovtZj3obV9ncoMRVjdmqc
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
ZEdBaGFTUkx2U3pvY0RSQ0J5dHNpUlVOVGNQbUF3
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
4
server_signature
YFe9bEQ8wbHo4adINlvWOheLnVlB1/9fyx2fEkOAr/TmMCZ6+XX2riX/hrN8ObiwroghpMOKwOoOX/KFwTO522esiQXYMskfoXnNKiN7rXWDJ8jigLBX444gXCL/J1y/fhyq5aI2hYy3yb9kjK2PiM9cFt6uI/nYRVr48d0KKq1+qPtq/wU9bnzuKeoRVLYwXUjRhPM6wJrQt0TP0W4BzsAaAVUBkjWTXnPg7t8zWct8sMxD52CpcOtm5UqImdRLoXd+b9OhJnwjEdEqGJ2cnM08YsINWClmFaUNkTe4aRYQXgTOPwBEe8XQuyx6Zuwv2ufTarY6okG/JLFe3POFBdN3DEFV+ye1if+XktEsH/dCYZJB6q6NErb9hlwSe16HiG321WetlE9LZfAsRVxrU1VhyOqEwR+lQHz98HdpQeBC4qdoO7ps9dKTwgO8Cl8JimRo2NN06HPI3hrB0/zwazsuZF+Ahen9u0rHHRVFkaDKshZ0R1pbx1ypcYrReemrhFbwkeoapc58L93j5fV08+uC4KXYs6O8RAAqFIIRNQgscT1PjhC6gMTWyknt4gOfNhQG51O1C6oRKtf0sTBt/bidlffLlaYIAqrn/YLDWekGM+IGqhGpg/y8SEfjeD5nYc+AzqFWwkpwg8OUb8iAy4g4IGEpAHy0HDfbA2Vp4TQ=

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3829776853-2076861744-2973657197-1000\Control Panel\International\Geo\Nation	SilverClient.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
232	powershell.exe

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

Web Service

T1102

flow	ioc
3	discord.com
5	discord.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
728	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
232	powershell.exe
232	powershell.exe
4460	SilverClient.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	SilverClient.exe
Token: SeDebugPrivilege	232	powershell.exe
Token: SeIncreaseQuotaPrivilege	232	powershell.exe
Token: SeSecurityPrivilege	232	powershell.exe
Token: SeTakeOwnershipPrivilege	232	powershell.exe
Token: SeLoadDriverPrivilege	232	powershell.exe
Token: SeSystemProfilePrivilege	232	powershell.exe
Token: SeSystemtimePrivilege	232	powershell.exe
Token: SeProfSingleProcessPrivilege	232	powershell.exe
Token: SeIncBasePriorityPrivilege	232	powershell.exe
Token: SeCreatePagefilePrivilege	232	powershell.exe
Token: SeBackupPrivilege	232	powershell.exe
Token: SeRestorePrivilege	232	powershell.exe
Token: SeShutdownPrivilege	232	powershell.exe
Token: SeDebugPrivilege	232	powershell.exe
Token: SeSystemEnvironmentPrivilege	232	powershell.exe
Token: SeRemoteShutdownPrivilege	232	powershell.exe
Token: SeUndockPrivilege	232	powershell.exe
Token: SeManageVolumePrivilege	232	powershell.exe
Token: 33	232	powershell.exe
Token: 34	232	powershell.exe
Token: 35	232	powershell.exe
Token: 36	232	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4460	SilverClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 384	4460	SilverClient.exe	83
PID 4460 wrote to memory of 384	4460	SilverClient.exe	83
PID 4460 wrote to memory of 728	4460	SilverClient.exe	85
PID 4460 wrote to memory of 728	4460	SilverClient.exe	85
PID 4460 wrote to memory of 4268	4460	SilverClient.exe	87
PID 4460 wrote to memory of 4268	4460	SilverClient.exe	87
PID 4460 wrote to memory of 232	4460	SilverClient.exe	89
PID 4460 wrote to memory of 232	4460	SilverClient.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⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4460
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /query /TN SilverClient.exe
  2⤵
  PID:384
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /Create /SC ONCE /TN "SilverClient.exe" /TR "C:\Users\Admin\AppData\Local\Temp\SilverClient.exe \"\SilverClient.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:728
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks.exe" /query /TN SilverClient.exe
  2⤵
  PID:4268
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0dkj2jmk.qib.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/232-12-0x0000020DEB4B0000-0x0000020DEB4D2000-memory.dmp

Filesize
136KB

Download
memory/4460-0-0x00007FF97D833000-0x00007FF97D835000-memory.dmp

Filesize
8KB

Download
memory/4460-1-0x00000000008F0000-0x00000000008FE000-memory.dmp

Filesize
56KB

Download
memory/4460-2-0x00007FF97D830000-0x00007FF97E2F2000-memory.dmp

Filesize
10.8MB

Download
memory/4460-15-0x00007FF97D833000-0x00007FF97D835000-memory.dmp

Filesize
8KB

Download
memory/4460-16-0x00007FF97D830000-0x00007FF97E2F2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads