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

Executes dropped EXE 1 IoCs

pid	Process
1824	stan.exe

Loads dropped DLL 1 IoCs

pid	Process
844	cmd.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2992	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
2852	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
3056	schtasks.exe
3040	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
860	stane.exe
860	stane.exe
860	stane.exe
2992	powershell.exe
1824	stan.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2296	vssvc.exe
Token: SeRestorePrivilege	2296	vssvc.exe
Token: SeAuditPrivilege	2296	vssvc.exe
Token: SeDebugPrivilege	860	stane.exe
Token: SeDebugPrivilege	1824	stan.exe
Token: SeDebugPrivilege	2992	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1824	stan.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 844	860	stane.exe	34
PID 860 wrote to memory of 844	860	stane.exe	34
PID 860 wrote to memory of 844	860	stane.exe	34
PID 844 wrote to memory of 2852	844	cmd.exe	36
PID 844 wrote to memory of 2852	844	cmd.exe	36
PID 844 wrote to memory of 2852	844	cmd.exe	36
PID 844 wrote to memory of 1824	844	cmd.exe	37
PID 844 wrote to memory of 1824	844	cmd.exe	37
PID 844 wrote to memory of 1824	844	cmd.exe	37
PID 1824 wrote to memory of 3020	1824	stan.exe	39
PID 1824 wrote to memory of 3020	1824	stan.exe	39
PID 1824 wrote to memory of 3020	1824	stan.exe	39
PID 1824 wrote to memory of 3056	1824	stan.exe	41
PID 1824 wrote to memory of 3056	1824	stan.exe	41
PID 1824 wrote to memory of 3056	1824	stan.exe	41
PID 1824 wrote to memory of 2508	1824	stan.exe	43
PID 1824 wrote to memory of 2508	1824	stan.exe	43
PID 1824 wrote to memory of 2508	1824	stan.exe	43
PID 1824 wrote to memory of 2992	1824	stan.exe	45
PID 1824 wrote to memory of 2992	1824	stan.exe	45
PID 1824 wrote to memory of 2992	1824	stan.exe	45
PID 1824 wrote to memory of 3040	1824	stan.exe	47
PID 1824 wrote to memory of 3040	1824	stan.exe	47
PID 1824 wrote to memory of 3040	1824	stan.exe	47

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:860
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA7E3.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:844
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2852
- - C:\Users\Admin\Release\stan.exe
    "C:\Users\Admin\Release\stan.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1824
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN stan.exe
      4⤵
      PID:3020
  - - 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:3056
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN stan.exe
      4⤵
      PID:2508
  - - 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:2992
  - - 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:3040

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2296

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA7E3.tmp.bat

Filesize
140B

MD5
c51963b13bcec95557904cb08ddc718c

SHA1
362c1e8f27bfd31ce56bbf7210237e0640dba787

SHA256
71659b1ea64d2ebbf62e4b268402fb62bf05683c9fe032b06046998b898191a5

SHA512
4cbc5fc6c05133a794d1d03cab0b57c27ecdb634d2817e405fc615893169b5b7c7d880e63e1097c0de190112c7c94223d85bb441a5910c7acf11ee5f1cd8d71a

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

Filesize
42KB

MD5
f6a1256df7865af7d271a8c0d45162a3

SHA1
95d2404a0ca38581b3a961b97c5635d4f5374202

SHA256
23966b7119be128117b4e17ed6c1e0f1861a9913497a8eed288aa09367dc8da5

SHA512
8f213f342a1f8da089732191893895b1d27b3157a386052ffa8993b02a5ff1d015248576a7c04259b0b06b534340c1bfc9f104ffdb8bc25501f5d607ce17befa

Download Submit
memory/860-0-0x000007FEF6193000-0x000007FEF6194000-memory.dmp

Filesize
4KB

Download
memory/860-1-0x000000013F8A0000-0x000000013F8AE000-memory.dmp

Filesize
56KB

Download
memory/860-2-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp

Filesize
9.9MB

Download
memory/860-12-0x000007FEF6190000-0x000007FEF6B7C000-memory.dmp

Filesize
9.9MB

Download
memory/1824-17-0x000000013F7B0000-0x000000013F7BE000-memory.dmp

Filesize
56KB

Download
memory/2992-22-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2992-23-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads