Malware Analysis Report

2025-03-15 01:12

Sample ID 250223-vhtn4svk18
Target SeroXenBoost.exe
SHA256 0902f1d84a1c4ae0bd2c0dbb029240487332655a0d7ea5106013b7a2590b519b
Tags
silverrat defense_evasion 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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

0902f1d84a1c4ae0bd2c0dbb029240487332655a0d7ea5106013b7a2590b519b

Threat Level: Known bad

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

Malicious Activity Summary

silverrat defense_evasion trojan

Silverrat family

SilverRat

Sets file to hidden

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Views/modifies file attributes

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-23 16:59

Signatures

Silverrat family

silverrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-23 16:59

Reported

2025-02-23 17:00

Platform

win7-20250207-en

Max time kernel

2s

Max time network

4s

Command Line

"C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.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

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A

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\SeroXenBoost.exe

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

C:\Windows\System32\attrib.exe

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

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe"

Network

N/A

Files

memory/1280-0-0x000007FEF5F43000-0x000007FEF5F44000-memory.dmp

memory/1280-1-0x000000013FFE0000-0x000000013FFF0000-memory.dmp

memory/1280-2-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-23 16:59

Reported

2025-02-23 17:00

Platform

win10v2004-20250217-en

Max time kernel

16s

Max time network

23s

Command Line

"C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.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-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SeroXenBoost.exe N/A

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\SeroXenBoost.exe

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

C:\Windows\System32\attrib.exe

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

C:\Windows\System32\attrib.exe

"C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Windows\$77xdwd.dll.exe"

Network

Files

memory/2952-0-0x00007FFBDE523000-0x00007FFBDE525000-memory.dmp

memory/2952-1-0x0000000000B20000-0x0000000000B30000-memory.dmp

memory/2952-2-0x00007FFBDE520000-0x00007FFBDEFE1000-memory.dmp

memory/2952-3-0x00007FFBDE523000-0x00007FFBDE525000-memory.dmp

memory/2952-4-0x00007FFBDE520000-0x00007FFBDEFE1000-memory.dmp