Malware Analysis Report

2025-04-13 11:56

Sample ID 240818-171fvaxfrg
Target Seroxen.exe
SHA256 f5dccd02d415f96bbde7cdcd9afa5376911166e795486e772a3ffa124fe45302
Tags
quasar skids spyware 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

f5dccd02d415f96bbde7cdcd9afa5376911166e795486e772a3ffa124fe45302

Threat Level: Known bad

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

Malicious Activity Summary

quasar skids spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-18 22:18

Signatures

Quasar family

quasar

Quasar payload

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-18 22:18

Reported

2024-08-18 22:20

Platform

win7-20240704-en

Max time kernel

149s

Max time network

150s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\Seroxen.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\Seroxen.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\Seroxen.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.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
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\Seroxen.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp

Files

memory/2200-0-0x000007FEF5F53000-0x000007FEF5F54000-memory.dmp

memory/2200-1-0x0000000000D30000-0x000000000105C000-memory.dmp

memory/2200-2-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

C:\Windows\system32\Windows\Windows Host Process.exe

MD5 ecd1d786fb4e8d2fdd9fde6d5ad3f5d3
SHA1 bea4d57cb8cc632b0074bfd1ef3739ee11399df1
SHA256 f5dccd02d415f96bbde7cdcd9afa5376911166e795486e772a3ffa124fe45302
SHA512 123086110b392ab14ca99b91b246266b93b21e0036cde9919649edcd83751cf163688a7795a781c6c3190cc3dcdc272ff7b3b9bc6c617cbac0cbc18908a46f1e

memory/672-9-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

memory/672-10-0x00000000000F0000-0x000000000041C000-memory.dmp

memory/2200-8-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

memory/672-11-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

memory/672-12-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-18 22:18

Reported

2024-08-18 22:25

Platform

win10v2004-20240802-en

Max time kernel

444s

Max time network

448s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\Seroxen.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.exe N/A
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\Seroxen.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\Seroxen.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
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\Seroxen.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
NL 52.178.17.2:443 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 31.73.42.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp

Files

memory/2208-0-0x00007FFC5D4F3000-0x00007FFC5D4F5000-memory.dmp

memory/2208-1-0x0000000000EB0000-0x00000000011DC000-memory.dmp

memory/2208-2-0x00007FFC5D4F0000-0x00007FFC5DFB1000-memory.dmp

C:\Windows\system32\Windows\Windows Host Process.exe

MD5 ecd1d786fb4e8d2fdd9fde6d5ad3f5d3
SHA1 bea4d57cb8cc632b0074bfd1ef3739ee11399df1
SHA256 f5dccd02d415f96bbde7cdcd9afa5376911166e795486e772a3ffa124fe45302
SHA512 123086110b392ab14ca99b91b246266b93b21e0036cde9919649edcd83751cf163688a7795a781c6c3190cc3dcdc272ff7b3b9bc6c617cbac0cbc18908a46f1e

memory/2208-10-0x00007FFC5D4F0000-0x00007FFC5DFB1000-memory.dmp

memory/2636-9-0x00007FFC5D4F0000-0x00007FFC5DFB1000-memory.dmp

memory/2636-11-0x00007FFC5D4F0000-0x00007FFC5DFB1000-memory.dmp

memory/2636-12-0x000000001B8D0000-0x000000001B920000-memory.dmp

memory/2636-13-0x000000001B9E0000-0x000000001BA92000-memory.dmp

memory/2636-14-0x00007FFC5D4F0000-0x00007FFC5DFB1000-memory.dmp