silverrat | c6d5b9c5182ddaf0bd94891685737f05c98aa24450ca6f04510d895ab79d793b

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
09/03/2025, 11:45

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General

Target

Unrip Soft.exe
Size

43KB
MD5

6a988e8a2a732be5cc1035faa34c9c35
SHA1

eb17e390a33a14f0f1baa9c9cf0207c36ae1c879
SHA256

c6d5b9c5182ddaf0bd94891685737f05c98aa24450ca6f04510d895ab79d793b
SHA512

749dbbd429658bc5ff91d93fd0de2dfad0162cd2b7b287c845b71dec4369d8238b68a17aaf353e81ce2e1f5c3522a9386f2cd827c8b43ce7a276badb2eed05fb
SSDEEP

768:kWyceSek8A//Ol6IoZmMPHhm7ravCJ8eEPURULQD9PuGrz1QB6SR/lE:kWyceSeKYtqJmdZKUGsD9f/1Qoe/lE

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

american-designed.gl.at.ply.gg:50767

Mutex

lAxDBRhAFu

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|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
reconnect_delay
1
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.

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
3252	attrib.exe
1088	attrib.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	Unrip Soft.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2278412438-3475196406-3686434223-1000\Control Panel\International\Geo\Nation	$77svshost.exe.exe

Executes dropped EXE 1 IoCs

pid	Process
444	$77svshost.exe.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\\sysreqses\\$77svshost.exe.exe\""	Unrip Soft.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1932	powershell.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 2 IoCs

defense_evasion

pid	Process
924	timeout.exe
2488	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
5092	schtasks.exe
4300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
2556	Unrip Soft.exe
444	$77svshost.exe.exe
444	$77svshost.exe.exe
1932	powershell.exe
1932	powershell.exe
1932	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2356	vssvc.exe
Token: SeRestorePrivilege	2356	vssvc.exe
Token: SeAuditPrivilege	2356	vssvc.exe
Token: SeDebugPrivilege	2556	Unrip Soft.exe
Token: SeDebugPrivilege	444	$77svshost.exe.exe
Token: SeDebugPrivilege	1932	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
444	$77svshost.exe.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 1088	2556	Unrip Soft.exe	91
PID 2556 wrote to memory of 1088	2556	Unrip Soft.exe	91
PID 2556 wrote to memory of 3252	2556	Unrip Soft.exe	93
PID 2556 wrote to memory of 3252	2556	Unrip Soft.exe	93
PID 2556 wrote to memory of 2220	2556	Unrip Soft.exe	106
PID 2556 wrote to memory of 2220	2556	Unrip Soft.exe	106
PID 2220 wrote to memory of 2488	2220	cmd.exe	108
PID 2220 wrote to memory of 2488	2220	cmd.exe	108
PID 2220 wrote to memory of 444	2220	cmd.exe	109
PID 2220 wrote to memory of 444	2220	cmd.exe	109
PID 444 wrote to memory of 4296	444	$77svshost.exe.exe	111
PID 444 wrote to memory of 4296	444	$77svshost.exe.exe	111
PID 444 wrote to memory of 5092	444	$77svshost.exe.exe	113
PID 444 wrote to memory of 5092	444	$77svshost.exe.exe	113
PID 444 wrote to memory of 276	444	$77svshost.exe.exe	115
PID 444 wrote to memory of 276	444	$77svshost.exe.exe	115
PID 444 wrote to memory of 1932	444	$77svshost.exe.exe	117
PID 444 wrote to memory of 1932	444	$77svshost.exe.exe	117
PID 444 wrote to memory of 4300	444	$77svshost.exe.exe	119
PID 444 wrote to memory of 4300	444	$77svshost.exe.exe	119
PID 444 wrote to memory of 852	444	$77svshost.exe.exe	133
PID 444 wrote to memory of 852	444	$77svshost.exe.exe	133
PID 444 wrote to memory of 3616	444	$77svshost.exe.exe	135
PID 444 wrote to memory of 3616	444	$77svshost.exe.exe	135
PID 3616 wrote to memory of 924	3616	cmd.exe	137
PID 3616 wrote to memory of 924	3616	cmd.exe	137
PID 852 wrote to memory of 4520	852	cmd.exe	138
PID 852 wrote to memory of 4520	852	cmd.exe	138

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

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
1088	attrib.exe
3252	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Unrip Soft.exe
"C:\Users\Admin\AppData\Local\Temp\Unrip Soft.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\sysreqses"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1088
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\sysreqses\$77svshost.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3252
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE34B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2220
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2488
- - C:\Users\Admin\sysreqses\$77svshost.exe.exe
    "C:\Users\Admin\sysreqses\$77svshost.exe.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:444
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77svshost.exe.exe
      4⤵
      PID:4296
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77svshost.exe.exe" /TR "C:\Users\Admin\sysreqses\$77svshost.exe.exe \"\$77svshost.exe.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:5092
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77svshost.exe.exe
      4⤵
      PID:276
  - - 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:1932
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "svshost.exe_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4300
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "$77svshost.exe_Task"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:852
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "$77svshost.exe_Task"
        5⤵
        
        PID:4520
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD2EB.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3616
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:924

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2356

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mscoraup.bzp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD2EB.tmp.bat

Filesize
230B

MD5
b3fb5557f01ccf4b3026ad873a10aefd

SHA1
2a410439eff0eedf51c3f69e2a5686d0d19f264f

SHA256
f4d0c88755a2459fdae26db62d0b0b4fa157811242db938cc1398711cab1abaa

SHA512
f5e5963d1cb5a54e62d2fb54ee9c3fa4ba12b70848e801090339943e2d3a13b0384561beda53712397d08dfe2e1605ddac26e2669cc39e3cd7080d4e98ac9af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE34B.tmp.bat

Filesize
152B

MD5
8462e6edfc3bc54281010fb1bca1f13f

SHA1
35623be8a1b62a53bc0a920325cb8fd5aadafa62

SHA256
9da7805fca95b464381d88e192a3aeb5e308b46d87ba0c6c17857f2c5e047467

SHA512
3d2138068bca5aff7b3a937f51f5b2b9c8582e26d65c74ecc0688527aff5dc223859c9250dc36fce05b4fbbfe92582308d7e6d289f9bcc21cd94f4ab527e55bd

Download Submit
C:\Users\Admin\sysreqses\$77svshost.exe.exe

Filesize
43KB

MD5
6a988e8a2a732be5cc1035faa34c9c35

SHA1
eb17e390a33a14f0f1baa9c9cf0207c36ae1c879

SHA256
c6d5b9c5182ddaf0bd94891685737f05c98aa24450ca6f04510d895ab79d793b

SHA512
749dbbd429658bc5ff91d93fd0de2dfad0162cd2b7b287c845b71dec4369d8238b68a17aaf353e81ce2e1f5c3522a9386f2cd827c8b43ce7a276badb2eed05fb

Download Submit
memory/444-28-0x000000001E750000-0x000000001E770000-memory.dmp

Filesize
128KB

Download
memory/1932-23-0x00000212BD4A0000-0x00000212BD4C2000-memory.dmp

Filesize
136KB

Download
memory/2556-0-0x00007FFEC5443000-0x00007FFEC5445000-memory.dmp

Filesize
8KB

Download
memory/2556-1-0x0000000000810000-0x0000000000820000-memory.dmp

Filesize
64KB

Download
memory/2556-2-0x00007FFEC5440000-0x00007FFEC5F01000-memory.dmp

Filesize
10.8MB

Download
memory/2556-3-0x00007FFEC5443000-0x00007FFEC5445000-memory.dmp

Filesize
8KB

Download
memory/2556-4-0x00007FFEC5440000-0x00007FFEC5F01000-memory.dmp

Filesize
10.8MB

Download
memory/2556-10-0x00007FFEC5440000-0x00007FFEC5F01000-memory.dmp

Filesize
10.8MB

Download