silverrat | 04109cb3426408945bea79e8e355285fb5bf93224b5b2775a5f6ff6c1e992b5f

Analysis

max time kernel
135s
max time network
144s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 02:24

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General

Target

SilverRat.exe
Size

45KB
MD5

545d64cc91e4da6339a70d54a2443c5d
SHA1

f03344ab824c7cf0f73dcc86aa34cab36e2e54e7
SHA256

04109cb3426408945bea79e8e355285fb5bf93224b5b2775a5f6ff6c1e992b5f
SHA512

733154a7f76840fad3ead2af149cf708807878ef3f08c62232ee3cdc0b7e6a4b4dc338103569daf9f755a6549475df15b34b7f223929348001d4086e83371681
SSDEEP

768:OarX4D9pmZGOXnXhEk75rVeZtxbuRULQj9SEQf9B6SbuDFvr1/xf:OarID9pVU5rVe3xCGsj9O9oQ2Fx/xf

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

auto-london.gl.at.ply.gg:51655

Mutex

SilverMutex_kTAAZjMenK

Attributes

certificate
MIIE4DCCAsigAwIBAgIQAKQYOfZd86J2BfNjhG4CWTANBgkqhkiG9w0BAQ0FADARMQ8wDQYDVQQDDAZTaWx2ZXIwIBcNMjIwODI2MTkwMTA4WhgPOTk5OTEyMzEyMzU5NTlaMBExDzANBgNVBAMMBlNpbHZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAPbpOWfhZTuOfEaqqImTTe5dNHAAry7/mf00DCoI4lPZfypsc1tYraxSPFeayGu09a3qdhkWKSVIgwnu2n4GLQNOCY9fh/1oyrX4Iir3BIkYeU7pKTWgjhUlAmFAUAaNr0ca23Ku2kN79jrDzRznOgE2DEW4p7OiM4Mb097ma9lzu7MyssHbY4VCteAhj9HZiplqBxaC1vXDmzxqG+gUZ1aLcyG7ssdkOjtWVBgT3gD/gOl7KchRzCFB1egDC/vD9WZCG35U3Ngi+IkTznoXR1R06cq4v0UnGjE37R2vcB21qb0ZYNiZJXZHv5i9+R7xoPeNoLda5PqnfGGbhPvNEdD56mdcOKlzGIuyemLkUo8texdpiBWKbtc3JZf5VsKxjJtHDK3xW6gDGI+PAirzGkFPmwcf8WgsblvzLg8OZpVxVs8rmKWoi6qIrf4CXnyl73J4lgzW+ir7PjANAQXwLNGdNnvdMeLeo/muGQPdeNpr6OczGGnkWA4qniHeL51/Gx0a8A+jP9zKiyu+qHcsP2IotgWDH/KlzJVr7IAum+DV92uV8poTDcUNcHaKvhHA65KmEtsvLbK6lFZcAMC0eWC0VgpW44T1/16rOaaky5mP6rTMc3nSyOl/lU/XgAgGGQPe22bRLWYzd3WVeEpI1WnHYXS+tL9IOe4kJP+pYsWDAgMBAAGjMjAwMB0GA1UdDgQWBBR32TJj2LeUx9L+RcSOvmFV6VJq6TAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBDQUAA4ICAQA+qucSOi7ov7Q1FmAjMf925KuvKuCNwJiu3Sqo3FDGVAD1fAwAi2FdyuXEO2VIUPZCkalFcBna5rqyrc6tcS4T0IL2TsYLrsuGir7PWP7CAcft1urYS1HpNpHxeH/nixwnQaQs/MuRmdm2TeCj6G21P5BTW55U5y9sMPSYwhbD2N7XLgnSQd5Y+80TR7FUiye/k3D37fI9PRhSQGbfYFRQQTmxj84dPTnY5CVgaY9d8fNiFZkyjaZdf+mibK0xQTf+xLVVj+toDNCkc1F462TdmFhCrHd4PoMo0yLDNv4SC6NLRq4haWDRtORw6gd5GYIoCQ3m3oQvNlNxXhhIjsOyxkxOrkCD0c+57PIc7EmKXieJa/XxnkcIVxO8dvTY/vijuz/VaZYl/lPu9ckuqgJ1wRvvsHl70Trv4Mn4X5uCIqRFFlK/mSOZbLIguGkDN3QIZABvej89vlZMhrVfZOG2oawe23FskHjv7thF/WzOXtWw6RUVC1V+hCwbuxFNUjZmmOTUwdXHnus7I2AuiG6Jz1+y9aYiXBcVTdSljxjHRRmiRaAnY94h58vN8NJ4hKL2GVCo6LxkpuplmcntJN0cKraKTPxSXcCRrqWxX9qoIbfvBcUU4vH1jPJCCLNCuDyD3lgQkpPVvq0EMU1a2HFGgMEQMjpYpb38rcadDhT5ag==
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1253749007772160090/mxExcAUGlJgTCbYOk_u7JJAnNpsIhMne5e0PjqkRY2MV_40Bgpix2Ezib84aFxRmN66j
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
QnZ2VW1rTFlUa09ESXhCRkdHYURSSlBBdk5SQk5J
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
0
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
2672	attrib.exe
2260	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
344	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
1368	cmd.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\\Microsoft\\Windows\\Templates\\hgfdfd\\$77Runtime Broker.exe\""	SilverRat.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1680	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

evasion

pid	Process
2884	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
1820	schtasks.exe
2480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2312	SilverRat.exe
2312	SilverRat.exe
2312	SilverRat.exe
1680	powershell.exe
344	$77Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2852	vssvc.exe
Token: SeRestorePrivilege	2852	vssvc.exe
Token: SeAuditPrivilege	2852	vssvc.exe
Token: SeDebugPrivilege	2312	SilverRat.exe
Token: SeDebugPrivilege	344	$77Runtime Broker.exe
Token: SeDebugPrivilege	1680	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
344	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 2672	2312	SilverRat.exe	34
PID 2312 wrote to memory of 2672	2312	SilverRat.exe	34
PID 2312 wrote to memory of 2672	2312	SilverRat.exe	34
PID 2312 wrote to memory of 2260	2312	SilverRat.exe	36
PID 2312 wrote to memory of 2260	2312	SilverRat.exe	36
PID 2312 wrote to memory of 2260	2312	SilverRat.exe	36
PID 2312 wrote to memory of 1368	2312	SilverRat.exe	38
PID 2312 wrote to memory of 1368	2312	SilverRat.exe	38
PID 2312 wrote to memory of 1368	2312	SilverRat.exe	38
PID 1368 wrote to memory of 2884	1368	cmd.exe	40
PID 1368 wrote to memory of 2884	1368	cmd.exe	40
PID 1368 wrote to memory of 2884	1368	cmd.exe	40
PID 1368 wrote to memory of 344	1368	cmd.exe	41
PID 1368 wrote to memory of 344	1368	cmd.exe	41
PID 1368 wrote to memory of 344	1368	cmd.exe	41
PID 344 wrote to memory of 1984	344	$77Runtime Broker.exe	43
PID 344 wrote to memory of 1984	344	$77Runtime Broker.exe	43
PID 344 wrote to memory of 1984	344	$77Runtime Broker.exe	43
PID 344 wrote to memory of 1820	344	$77Runtime Broker.exe	45
PID 344 wrote to memory of 1820	344	$77Runtime Broker.exe	45
PID 344 wrote to memory of 1820	344	$77Runtime Broker.exe	45
PID 344 wrote to memory of 2952	344	$77Runtime Broker.exe	47
PID 344 wrote to memory of 2952	344	$77Runtime Broker.exe	47
PID 344 wrote to memory of 2952	344	$77Runtime Broker.exe	47
PID 344 wrote to memory of 1680	344	$77Runtime Broker.exe	49
PID 344 wrote to memory of 1680	344	$77Runtime Broker.exe	49
PID 344 wrote to memory of 1680	344	$77Runtime Broker.exe	49
PID 344 wrote to memory of 2480	344	$77Runtime Broker.exe	51
PID 344 wrote to memory of 2480	344	$77Runtime Broker.exe	51
PID 344 wrote to memory of 2480	344	$77Runtime Broker.exe	51

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
2672	attrib.exe
2260	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverRat.exe
"C:\Users\Admin\AppData\Local\Temp\SilverRat.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2672
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2260
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBD85.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1368
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2884
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:344
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:1984
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Runtime Broker.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe \"\$77Runtime Broker.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1820
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2952
  - - 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:1680
  - - 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:2480

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2852

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBD85.tmp.bat

Filesize
196B

MD5
4519d50cc3709f5bfc41bb877701a0ef

SHA1
63cef4ad117706570e7e6bc7da28299a1d990d2c

SHA256
48af1a175ebcb83282b229ebc74181e49618755317fa84f21f7a63d43e49030c

SHA512
effd9cdea8db7e6573a7273349aac649904f9be2d413cf1635608d7945cd08b127fba657cd58452df3ac08e7a7f488a3c41a3d2392b042ae65710ed9e94f57af

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe

Filesize
45KB

MD5
545d64cc91e4da6339a70d54a2443c5d

SHA1
f03344ab824c7cf0f73dcc86aa34cab36e2e54e7

SHA256
04109cb3426408945bea79e8e355285fb5bf93224b5b2775a5f6ff6c1e992b5f

SHA512
733154a7f76840fad3ead2af149cf708807878ef3f08c62232ee3cdc0b7e6a4b4dc338103569daf9f755a6549475df15b34b7f223929348001d4086e83371681

Download Submit
memory/344-19-0x000000013FE60000-0x000000013FE70000-memory.dmp

Filesize
64KB

Download
memory/1680-24-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/1680-25-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/2312-0-0x000007FEF52B3000-0x000007FEF52B4000-memory.dmp

Filesize
4KB

Download
memory/2312-1-0x000000013FCC0000-0x000000013FCD0000-memory.dmp

Filesize
64KB

Download
memory/2312-2-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/2312-3-0x000007FEF52B3000-0x000007FEF52B4000-memory.dmp

Filesize
4KB

Download
memory/2312-4-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/2312-14-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download