Malware Analysis Report

2025-03-15 01:14

Sample ID 250220-23bglaxkdx
Target config.exe
SHA256 d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
Tags
silverrat defense_evasion execution persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799

Threat Level: Known bad

The file config.exe was found to be: Known bad.

Malicious Activity Summary

silverrat defense_evasion execution persistence trojan

SilverRat

Silverrat family

Sets file to hidden

Checks computer location settings

Executes dropped EXE

Command and Scripting Interpreter: PowerShell

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Views/modifies file attributes

Scheduled Task/Job: Scheduled Task

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-20 23:05

Signatures

Silverrat family

silverrat

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-20 23:05

Reported

2025-02-20 23:08

Platform

win10v2004-20250217-en

Max time kernel

142s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\config.exe"

Signatures

SilverRat

trojan silverrat

Silverrat family

silverrat

Sets file to hidden

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\System32\attrib.exe N/A
N/A N/A C:\Windows\System32\attrib.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\config.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation C:\Users\Admin\discord\$77discord.exe.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\discord\$77discord.exe.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\discord\\$77discord.exe.exe\"" C:\Users\Admin\AppData\Local\Temp\config.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Enumerates physical storage devices

Delays execution with timeout.exe

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\config.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\discord\$77discord.exe.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\discord\$77discord.exe.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1224 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 1224 wrote to memory of 116 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 1224 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 1224 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 1224 wrote to memory of 1512 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 1224 wrote to memory of 1512 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 1512 wrote to memory of 1876 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1512 wrote to memory of 1876 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1512 wrote to memory of 2096 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 1512 wrote to memory of 2096 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 2096 wrote to memory of 5072 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2096 wrote to memory of 5072 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2096 wrote to memory of 2860 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\schtasks.exe
PID 2096 wrote to memory of 2860 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Views/modifies file attributes

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\System32\attrib.exe N/A
N/A N/A C:\Windows\System32\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\config.exe

"C:\Users\Admin\AppData\Local\Temp\config.exe"

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord"

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord\$77discord.exe.exe"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEE29.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Users\Admin\discord\$77discord.exe.exe

"C:\Users\Admin\discord\$77discord.exe.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /sc daily /tn "discord.exe_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00

Network

Country Destination Domain Proto
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 pastebin.com udp
US 104.20.3.235:443 pastebin.com tcp
US 8.8.8.8:53 AK4-53145.portmap.host udp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp
DE 193.161.193.99:53145 AK4-53145.portmap.host tcp

Files

memory/1224-0-0x00007FFE28CD3000-0x00007FFE28CD5000-memory.dmp

memory/1224-1-0x00000000005A0000-0x00000000005AE000-memory.dmp

memory/1224-2-0x00007FFE28CD0000-0x00007FFE29791000-memory.dmp

memory/1224-3-0x00007FFE28CD3000-0x00007FFE28CD5000-memory.dmp

memory/1224-4-0x00007FFE28CD0000-0x00007FFE29791000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpEE29.tmp.bat

MD5 52528fcc798b6efa8787bd86e8b269a4
SHA1 62cdf2ce3f5928ef35f201b55859b5e473202096
SHA256 797b8190201e752ad7238950d3d04416076dbaece023951ec1fcf8d7844cde11
SHA512 44c0526b483b498881a10b64acbfb63d6df4557bfd8792996e16901e20572cf495d018e3c7c33329a0535b2e55c2d696eb78562726b49f49af2366d37663ba98

memory/1224-10-0x00007FFE28CD0000-0x00007FFE29791000-memory.dmp

C:\Users\Admin\discord\$77discord.exe.exe

MD5 f04fdc29810e2b16364d85fdd50aa425
SHA1 eb097566fec9bd89079240fba838c4f64bbcc757
SHA256 d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
SHA512 296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b

memory/2096-14-0x00007FFE28CD0000-0x00007FFE29791000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iwyrjjdn.qwx.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/5072-24-0x0000022C00000000-0x0000022C00022000-memory.dmp

memory/2096-27-0x00007FFE28CD0000-0x00007FFE29791000-memory.dmp

memory/2096-28-0x000000001F1F0000-0x000000001F200000-memory.dmp