silverrat | c6d5b9c5182ddaf0bd94891685737f05c98aa24450ca6f04510d895ab79d793b

Analysis

max time kernel
121s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09/03/2025, 11:55

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

UnripSoft.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
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
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
2292	attrib.exe
324	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2708	$77svshost.exe.exe

Loads dropped DLL 1 IoCs

pid	Process
1964	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\\sysreqses\\$77svshost.exe.exe\""	UnripSoft.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2116	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 1 IoCs

defense_evasion

pid	Process
800	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
2704	schtasks.exe
2608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
268	UnripSoft.exe
268	UnripSoft.exe
268	UnripSoft.exe
2708	$77svshost.exe.exe
2116	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	3068	vssvc.exe
Token: SeRestorePrivilege	3068	vssvc.exe
Token: SeAuditPrivilege	3068	vssvc.exe
Token: SeDebugPrivilege	268	UnripSoft.exe
Token: SeDebugPrivilege	2708	$77svshost.exe.exe
Token: SeDebugPrivilege	2116	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	$77svshost.exe.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 268 wrote to memory of 2292	268	UnripSoft.exe	35
PID 268 wrote to memory of 2292	268	UnripSoft.exe	35
PID 268 wrote to memory of 2292	268	UnripSoft.exe	35
PID 268 wrote to memory of 324	268	UnripSoft.exe	37
PID 268 wrote to memory of 324	268	UnripSoft.exe	37
PID 268 wrote to memory of 324	268	UnripSoft.exe	37
PID 268 wrote to memory of 1964	268	UnripSoft.exe	39
PID 268 wrote to memory of 1964	268	UnripSoft.exe	39
PID 268 wrote to memory of 1964	268	UnripSoft.exe	39
PID 1964 wrote to memory of 800	1964	cmd.exe	41
PID 1964 wrote to memory of 800	1964	cmd.exe	41
PID 1964 wrote to memory of 800	1964	cmd.exe	41
PID 1964 wrote to memory of 2708	1964	cmd.exe	42
PID 1964 wrote to memory of 2708	1964	cmd.exe	42
PID 1964 wrote to memory of 2708	1964	cmd.exe	42
PID 2708 wrote to memory of 2248	2708	$77svshost.exe.exe	44
PID 2708 wrote to memory of 2248	2708	$77svshost.exe.exe	44
PID 2708 wrote to memory of 2248	2708	$77svshost.exe.exe	44
PID 2708 wrote to memory of 2704	2708	$77svshost.exe.exe	46
PID 2708 wrote to memory of 2704	2708	$77svshost.exe.exe	46
PID 2708 wrote to memory of 2704	2708	$77svshost.exe.exe	46
PID 2708 wrote to memory of 2100	2708	$77svshost.exe.exe	48
PID 2708 wrote to memory of 2100	2708	$77svshost.exe.exe	48
PID 2708 wrote to memory of 2100	2708	$77svshost.exe.exe	48
PID 2708 wrote to memory of 2116	2708	$77svshost.exe.exe	50
PID 2708 wrote to memory of 2116	2708	$77svshost.exe.exe	50
PID 2708 wrote to memory of 2116	2708	$77svshost.exe.exe	50
PID 2708 wrote to memory of 2608	2708	$77svshost.exe.exe	52
PID 2708 wrote to memory of 2608	2708	$77svshost.exe.exe	52
PID 2708 wrote to memory of 2608	2708	$77svshost.exe.exe	52

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
324	attrib.exe
2292	attrib.exe

C:\Users\Admin\AppData\Local\Temp\UnripSoft.exe
"C:\Users\Admin\AppData\Local\Temp\UnripSoft.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:268
- 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:2292
- 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:324
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2EED.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1964
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:800
- - C:\Users\Admin\sysreqses\$77svshost.exe.exe
    "C:\Users\Admin\sysreqses\$77svshost.exe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2708
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77svshost.exe.exe
      4⤵
      PID:2248
  - - 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:2704
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77svshost.exe.exe
      4⤵
      PID:2100
  - - 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:2116
  - - 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:2608

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3068

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
71KB

MD5
83142242e97b8953c386f988aa694e4a

SHA1
833ed12fc15b356136dcdd27c61a50f59c5c7d50

SHA256
d72761e1a334a754ce8250e3af7ea4bf25301040929fd88cf9e50b4a9197d755

SHA512
bb6da177bd16d163f377d9b4c63f6d535804137887684c113cc2f643ceab4f34338c06b5a29213c23d375e95d22ef417eac928822dfb3688ce9e2de9d5242d10

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarDBD5.tmp

Filesize
183KB

MD5
109cab5505f5e065b63d01361467a83b

SHA1
4ed78955b9272a9ed689b51bf2bf4a86a25e53fc

SHA256
ea6b7f51e85835c09259d9475a7d246c3e764ad67c449673f9dc97172c351673

SHA512
753a6da5d6889dd52f40208e37f2b8c185805ef81148682b269fff5aa84a46d710fe0ebfe05bce625da2e801e1c26745998a41266fa36bf47bc088a224d730cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2EED.tmp.bat

Filesize
152B

MD5
f799396dbb24fc4a1ef7b07d103c6ac5

SHA1
a9b848c2b73d650d41cf331d5df0679f302fbb56

SHA256
0a18465def9608bf89e74de64d539cb4193806676c72aa3e00994a2646e166ee

SHA512
42020d696deab7b459ad4c761a49d827a3e798febf39915fea830d8f0906ca4e79e78f08dce1a9706d4f2e37d19ecce9e9a288f9d0808f3f7a620b9b5d8ea185

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

Filesize
43KB

MD5
6a988e8a2a732be5cc1035faa34c9c35

SHA1
eb17e390a33a14f0f1baa9c9cf0207c36ae1c879

SHA256
c6d5b9c5182ddaf0bd94891685737f05c98aa24450ca6f04510d895ab79d793b

SHA512
749dbbd429658bc5ff91d93fd0de2dfad0162cd2b7b287c845b71dec4369d8238b68a17aaf353e81ce2e1f5c3522a9386f2cd827c8b43ce7a276badb2eed05fb

Download Submit
memory/268-14-0x000007FEF5620000-0x000007FEF600C000-memory.dmp

Filesize
9.9MB

Download
memory/268-4-0x000007FEF5620000-0x000007FEF600C000-memory.dmp

Filesize
9.9MB

Download
memory/268-0-0x000007FEF5623000-0x000007FEF5624000-memory.dmp

Filesize
4KB

Download
memory/268-3-0x000007FEF5623000-0x000007FEF5624000-memory.dmp

Filesize
4KB

Download
memory/268-2-0x000007FEF5620000-0x000007FEF600C000-memory.dmp

Filesize
9.9MB

Download
memory/268-1-0x000000013F9B0000-0x000000013F9C0000-memory.dmp

Filesize
64KB

Download
memory/2116-24-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2116-25-0x0000000002250000-0x0000000002258000-memory.dmp

Filesize
32KB

Download
memory/2708-19-0x000000013F5C0000-0x000000013F5D0000-memory.dmp

Filesize
64KB

Download
memory/2708-44-0x00000000009B0000-0x00000000009C0000-memory.dmp

Filesize
64KB

Download