Malware Analysis Report

2025-03-15 01:11

Sample ID 250220-25r75axlas
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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

Loads dropped DLL

Executes dropped EXE

Legitimate hosting services abused for malware hosting/C2

Command and Scripting Interpreter: PowerShell

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

Suspicious use of SetWindowsHookEx

Views/modifies file attributes

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-20 23:10

Signatures

Silverrat family

silverrat

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-20 23:10

Reported

2025-02-20 23:12

Platform

win10v2004-20250217-en

Max time kernel

135s

Max time network

144s

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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\config.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-2593460650-190333679-3676257533-1000\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 3568 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 3568 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 3568 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 3568 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 3568 wrote to memory of 3424 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 3568 wrote to memory of 3424 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 3424 wrote to memory of 3472 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 3424 wrote to memory of 3472 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 3424 wrote to memory of 2004 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 3424 wrote to memory of 2004 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 2004 wrote to memory of 4384 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2004 wrote to memory of 4384 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2004 wrote to memory of 1976 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\schtasks.exe
PID 2004 wrote to memory of 1976 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\tmpCD62.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 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/3568-0-0x00007FFD17623000-0x00007FFD17625000-memory.dmp

memory/3568-1-0x0000000000BE0000-0x0000000000BEE000-memory.dmp

memory/3568-2-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

memory/3568-3-0x00007FFD17623000-0x00007FFD17625000-memory.dmp

memory/3568-4-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpCD62.tmp.bat

MD5 ba86a795aefd9fa139d96732c48ca1d6
SHA1 3444ea670694851db5b2ac139186df861178a419
SHA256 c088a02439e8e3f33123fc085cc27643e6d381111b762a31423b9dd0be1f217e
SHA512 a2b9fecf0df0b852bb77e8ba79c7b6ddfcbd7d655871d4092bbaa4c2b8a68e74b0ad5c3ace9818f585a6f53b8e010533cd2e85a304a48262615ccfa5ff148ccb

memory/3568-10-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

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

MD5 f04fdc29810e2b16364d85fdd50aa425
SHA1 eb097566fec9bd89079240fba838c4f64bbcc757
SHA256 d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
SHA512 296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b

memory/2004-14-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

memory/4384-20-0x00000258FA3D0000-0x00000258FA3F2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vp4ewjhm.moa.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2004-27-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-20 23:10

Reported

2025-02-20 23:12

Platform

win7-20240729-en

Max time kernel

137s

Max time network

147s

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

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\system32\cmd.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 2464 wrote to memory of 1780 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 1780 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 1780 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\System32\attrib.exe
PID 2464 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 2464 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 2464 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\config.exe C:\Windows\system32\cmd.exe
PID 1132 wrote to memory of 2776 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1132 wrote to memory of 2776 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1132 wrote to memory of 2776 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1132 wrote to memory of 2676 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 1132 wrote to memory of 2676 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 1132 wrote to memory of 2676 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\discord\$77discord.exe.exe
PID 2676 wrote to memory of 1912 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2676 wrote to memory of 1912 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2676 wrote to memory of 1912 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2676 wrote to memory of 696 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\schtasks.exe
PID 2676 wrote to memory of 696 N/A C:\Users\Admin\discord\$77discord.exe.exe C:\Windows\System32\schtasks.exe
PID 2676 wrote to memory of 696 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

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD597.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 pastebin.com udp
US 172.67.19.24:443 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/2464-0-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

memory/2464-1-0x000000013FAF0000-0x000000013FAFE000-memory.dmp

memory/2464-2-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

memory/2464-3-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

memory/2464-4-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpD597.tmp.bat

MD5 42d8f4586db2900a79a68773d5e1ba80
SHA1 1fd011773233aa875bdd7beed2700ccdac0e42fe
SHA256 ba40c92ef7741d5338fb3f66dbe2f488be014c5287713ff6549fc823b3c8445e
SHA512 d9d393ac1591ba31f3534237b4948c63c9f7dc5e9ba269151b0e4638f3e3efffe300198034cdef3d8a4c8f237c2db40f4d067f8a154cea191d2d50e3f94479e7

memory/2464-14-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

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

MD5 f04fdc29810e2b16364d85fdd50aa425
SHA1 eb097566fec9bd89079240fba838c4f64bbcc757
SHA256 d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
SHA512 296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b

memory/2676-19-0x000000013FE30000-0x000000013FE3E000-memory.dmp

memory/1912-24-0x000000001B700000-0x000000001B9E2000-memory.dmp

memory/1912-25-0x0000000001F40000-0x0000000001F48000-memory.dmp