silverrat | 0bd5db256d6851fc62f6852d8b5a2b337552cb18f176b175ed6ee0d0e3ef71f0

General

Target

stane.exe
Size

42KB
MD5

f6a1256df7865af7d271a8c0d45162a3
SHA1

95d2404a0ca38581b3a961b97c5635d4f5374202
SHA256

23966b7119be128117b4e17ed6c1e0f1861a9913497a8eed288aa09367dc8da5
SHA512

8f213f342a1f8da089732191893895b1d27b3157a386052ffa8993b02a5ff1d015248576a7c04259b0b06b534340c1bfc9f104ffdb8bc25501f5d607ce17befa
SSDEEP

768:jT2KIg20zc8+3KXQvBRkttVu3hmyhxmzRUE98vDB6S4oMv+a7AA:jT2KI36NnPVmhmqxmzGE9YoXoMWa7AA

Score

10^/10

silverrat execution trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

127.0.0.1:7777

Mutex

SilverMutex_rRFGGPWbDL

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1347588263912931471/4fuOJGBeWfPxS355n2A3rAvoaJIHu2buEs4u328VgX04b1AG-Wms_voyFPh7UbKvQmaN
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
VUR3VFRDaUFnUE9PUmJsdlJXVEFlVkdSSEVsU1JB
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

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-1-5-21-3218366390-1258052702-4267193707-1000\Control Panel\International\Geo\Nation	stan.exe

Executes dropped EXE 1 IoCs

pid	Process
4844	stan.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1916	powershell.exe

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

Web Service

T1102

flow	ioc
11	discord.com
12	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
5048	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
3052	schtasks.exe
4212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
3972	stane.exe
1916	powershell.exe
1916	powershell.exe
4844	stan.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4456	vssvc.exe
Token: SeRestorePrivilege	4456	vssvc.exe
Token: SeAuditPrivilege	4456	vssvc.exe
Token: SeDebugPrivilege	3972	stane.exe
Token: SeDebugPrivilege	4844	stan.exe
Token: SeDebugPrivilege	1916	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4844	stan.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 2772	3972	stane.exe	92
PID 3972 wrote to memory of 2772	3972	stane.exe	92
PID 2772 wrote to memory of 5048	2772	cmd.exe	94
PID 2772 wrote to memory of 5048	2772	cmd.exe	94
PID 2772 wrote to memory of 4844	2772	cmd.exe	95
PID 2772 wrote to memory of 4844	2772	cmd.exe	95
PID 4844 wrote to memory of 2076	4844	stan.exe	97
PID 4844 wrote to memory of 2076	4844	stan.exe	97
PID 4844 wrote to memory of 3052	4844	stan.exe	99
PID 4844 wrote to memory of 3052	4844	stan.exe	99
PID 4844 wrote to memory of 376	4844	stan.exe	101
PID 4844 wrote to memory of 376	4844	stan.exe	101
PID 4844 wrote to memory of 1916	4844	stan.exe	103
PID 4844 wrote to memory of 1916	4844	stan.exe	103
PID 4844 wrote to memory of 4212	4844	stan.exe	105
PID 4844 wrote to memory of 4212	4844	stan.exe	105

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

C:\Users\Admin\AppData\Local\Temp\stane.exe
"C:\Users\Admin\AppData\Local\Temp\stane.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC8ED.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:5048
- - C:\Users\Admin\Release\stan.exe
    "C:\Users\Admin\Release\stan.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4844
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN stan.exe
      4⤵
      PID:2076
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "stan.exe" /TR "C:\Users\Admin\Release\stan.exe \"\stan.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3052
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN stan.exe
      4⤵
      PID:376
  - - 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:1916
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "stan_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4212

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4456

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_ub3pcm55.u2t.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC8ED.tmp.bat

Filesize
140B

MD5
17a3c2c04954ec086763479f64dc02a2

SHA1
11d4c9a1596a68b0049450c7aa963492e26a9b1e

SHA256
d787819546674dfd4a7aac72ed43ae7b5d5092827ba483ad4557310ac1590236

SHA512
e397eafd6cbfedbfc0d8833e92930448d514ee252f030b3aec65d9501dca40717da77a2f931d598b6ebbf4d9bdce5a79173b0b7bd9c7536647bb48bc636d2b83

Download Submit
C:\Users\Admin\Release\stan.exe

Filesize
42KB

MD5
f6a1256df7865af7d271a8c0d45162a3

SHA1
95d2404a0ca38581b3a961b97c5635d4f5374202

SHA256
23966b7119be128117b4e17ed6c1e0f1861a9913497a8eed288aa09367dc8da5

SHA512
8f213f342a1f8da089732191893895b1d27b3157a386052ffa8993b02a5ff1d015248576a7c04259b0b06b534340c1bfc9f104ffdb8bc25501f5d607ce17befa

Download Submit
memory/1916-22-0x0000025546FA0000-0x0000025546FC2000-memory.dmp

Filesize
136KB

Download
memory/3972-1-0x0000000000100000-0x000000000010E000-memory.dmp

Filesize
56KB

Download
memory/3972-0-0x00007FF83E603000-0x00007FF83E605000-memory.dmp

Filesize
8KB

Download
memory/3972-2-0x00007FF83E600000-0x00007FF83F0C1000-memory.dmp

Filesize
10.8MB

Download
memory/3972-8-0x00007FF83E600000-0x00007FF83F0C1000-memory.dmp

Filesize
10.8MB

Download
memory/4844-12-0x00007FF83E600000-0x00007FF83F0C1000-memory.dmp

Filesize
10.8MB

Download
memory/4844-25-0x00007FF83E600000-0x00007FF83F0C1000-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