silverrat | ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a

General

Target

SilverClient1.exe
Size

45KB
MD5

10c29d17cddebc5bc923d772d290dc07
SHA1

5a8921b88feb366603b53f9ce6262923d4f91007
SHA256

ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a
SHA512

6370958e3bdeb30752a1c45b9a45053199532248b407a9b096a1165d5aff26b6945bf99ef57a20ef1a325e31f647c06ec77ad711fe0af29e9560784629505d48
SSDEEP

768:ojVlwJCpLU1T+mJX1fjFES0eMFauXCRULc9PEKe24MB6SvsSdSvriV8P:ojnpLUHDfj2qMsGY9s24Mo6s6SWV8P

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

answer-patients.gl.at.ply.gg:9999

Mutex

SilverMutex_SDAVCufceR

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1312253993573154927/MAlWE1rv9VTYlLHyEAC7NMPsptI2-xQsJrqm0pXRFGSpkqsMY_fZrAYXEoW8Yc5JgYxA
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
cWZBYXRRU29UeEJrVW9MT0ZoZ2pFSUVEZWN4RkV5
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.

evasion

Hidden Files and Directories

T1564.001

pid	Process
4644	attrib.exe
3016	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
476	$77Spoofer.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\\SecHex\\$77Spoofer.exe\""	SilverClient1.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1076	powershell.exe

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

Web Service

T1102

flow	ioc
1	discord.com
2	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

evasion

pid	Process
3312	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
900	schtasks.exe
1532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
1076	powershell.exe
1076	powershell.exe
476	$77Spoofer.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	1208	vssvc.exe
Token: SeRestorePrivilege	1208	vssvc.exe
Token: SeAuditPrivilege	1208	vssvc.exe
Token: SeDebugPrivilege	4884	SilverClient1.exe
Token: SeDebugPrivilege	476	$77Spoofer.exe
Token: SeDebugPrivilege	1076	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
476	$77Spoofer.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 4644	4884	SilverClient1.exe	81
PID 4884 wrote to memory of 4644	4884	SilverClient1.exe	81
PID 4884 wrote to memory of 3016	4884	SilverClient1.exe	83
PID 4884 wrote to memory of 3016	4884	SilverClient1.exe	83
PID 4884 wrote to memory of 4088	4884	SilverClient1.exe	85
PID 4884 wrote to memory of 4088	4884	SilverClient1.exe	85
PID 4088 wrote to memory of 3312	4088	cmd.exe	87
PID 4088 wrote to memory of 3312	4088	cmd.exe	87
PID 4088 wrote to memory of 476	4088	cmd.exe	88
PID 4088 wrote to memory of 476	4088	cmd.exe	88
PID 476 wrote to memory of 1372	476	$77Spoofer.exe	90
PID 476 wrote to memory of 1372	476	$77Spoofer.exe	90
PID 476 wrote to memory of 900	476	$77Spoofer.exe	92
PID 476 wrote to memory of 900	476	$77Spoofer.exe	92
PID 476 wrote to memory of 2928	476	$77Spoofer.exe	94
PID 476 wrote to memory of 2928	476	$77Spoofer.exe	94
PID 476 wrote to memory of 1076	476	$77Spoofer.exe	96
PID 476 wrote to memory of 1076	476	$77Spoofer.exe	96
PID 476 wrote to memory of 1532	476	$77Spoofer.exe	98
PID 476 wrote to memory of 1532	476	$77Spoofer.exe	98

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

evasion

Hidden Files and Directories

T1564.001

pid	Process
4644	attrib.exe
3016	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverClient1.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient1.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\SecHex"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4644
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3016
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4088
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3312
- - C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe
    "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:476
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Spoofer.exe
      4⤵
      PID:1372
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Spoofer.exe" /TR "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe \"\$77Spoofer.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:900
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Spoofer.exe
      4⤵
      PID:2928
  - - 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:1076
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "Spoofer_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1532

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1208

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

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\__PSScriptPolicyTest_bdietipr.jbe.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD62C.tmp.bat

Filesize
161B

MD5
e2cd48dbfb139b0d7307486d8225cfc0

SHA1
ff7b61476a224c1e24c9f18e876e4abebab3c187

SHA256
c1acdec48b470e49eae380e6aeebe34cbe457d1c5c70d0fd8bb7d115b030c7b2

SHA512
6eef6046fa01aced55730ccc8461247919f17ef008dff3fee82150d6b6d8f7f0d36bfb7bd8cd641b480c95a10546eafa97022e914e9a06a2864e43636e991dac

Download Submit
C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe

Filesize
45KB

MD5
10c29d17cddebc5bc923d772d290dc07

SHA1
5a8921b88feb366603b53f9ce6262923d4f91007

SHA256
ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a

SHA512
6370958e3bdeb30752a1c45b9a45053199532248b407a9b096a1165d5aff26b6945bf99ef57a20ef1a325e31f647c06ec77ad711fe0af29e9560784629505d48

Download Submit
memory/1076-20-0x000001E81E120000-0x000001E81E142000-memory.dmp

Filesize
136KB

Download
memory/4884-0-0x00007FFDC1363000-0x00007FFDC1365000-memory.dmp

Filesize
8KB

Download
memory/4884-1-0x0000000000600000-0x0000000000610000-memory.dmp

Filesize
64KB

Download
memory/4884-2-0x00007FFDC1360000-0x00007FFDC1E22000-memory.dmp

Filesize
10.8MB

Download
memory/4884-4-0x00007FFDC1363000-0x00007FFDC1365000-memory.dmp

Filesize
8KB

Download
memory/4884-5-0x00007FFDC1360000-0x00007FFDC1E22000-memory.dmp

Filesize
10.8MB

Download
memory/4884-10-0x00007FFDC1360000-0x00007FFDC1E22000-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