Malware Analysis Report

2025-04-14 04:54

Sample ID 241213-l1nq5svkgx
Target Loader.exe
SHA256 e63b41bfdd3a89b6ebcfc05db158fdc399dbc081e49b01498831a62df34defc3
Tags
quasar office04 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

e63b41bfdd3a89b6ebcfc05db158fdc399dbc081e49b01498831a62df34defc3

Threat Level: Known bad

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

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-13 10:00

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

2024-12-13 10:00

Reported

2024-12-13 10:02

Platform

win7-20240903-en

Max time kernel

148s

Max time network

149s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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:\Users\Admin\AppData\Roaming\SubDir\Client.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\Loader.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "SubStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "SubStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 Dystopian-62863.portmap.host udp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp

Files

memory/2108-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

memory/2108-1-0x0000000000240000-0x0000000000564000-memory.dmp

memory/2108-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 e9a138d8c5ab2cccc8bf9976f66d30c8
SHA1 e996894168f0d4e852162d1290250dfa986310f8
SHA256 e63b41bfdd3a89b6ebcfc05db158fdc399dbc081e49b01498831a62df34defc3
SHA512 5982fc759c8b1121ab5befaac53e1521931f06d276140195fa1fcbcd1069f546253e366ef4cc37245b3bc2ed60c4b8d0583f133a1264efd77938adf456a08ccc

memory/2992-9-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

memory/2108-8-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

memory/2992-10-0x0000000000040000-0x0000000000364000-memory.dmp

memory/2992-11-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

memory/2992-12-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-13 10:00

Reported

2024-12-13 10:02

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

141s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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:\Users\Admin\AppData\Roaming\SubDir\Client.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\Loader.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "SubStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "SubStart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 Dystopian-62863.portmap.host udp
DE 193.161.193.99:62863 Dystopian-62863.portmap.host tcp
US 8.8.8.8:53 99.193.161.193.in-addr.arpa udp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 106.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

memory/2920-0-0x00007FFB1AC13000-0x00007FFB1AC15000-memory.dmp

memory/2920-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp

memory/2920-2-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 e9a138d8c5ab2cccc8bf9976f66d30c8
SHA1 e996894168f0d4e852162d1290250dfa986310f8
SHA256 e63b41bfdd3a89b6ebcfc05db158fdc399dbc081e49b01498831a62df34defc3
SHA512 5982fc759c8b1121ab5befaac53e1521931f06d276140195fa1fcbcd1069f546253e366ef4cc37245b3bc2ed60c4b8d0583f133a1264efd77938adf456a08ccc

memory/3012-9-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

memory/2920-10-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

memory/3012-11-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

memory/3012-12-0x000000001BDD0000-0x000000001BE20000-memory.dmp

memory/3012-13-0x000000001C690000-0x000000001C742000-memory.dmp

memory/3012-16-0x000000001BE40000-0x000000001BE52000-memory.dmp

memory/3012-17-0x000000001C5D0000-0x000000001C60C000-memory.dmp

memory/3012-18-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

memory/3012-19-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp

memory/3012-21-0x00007FFB1AC10000-0x00007FFB1B6D1000-memory.dmp