Malware Analysis Report

2024-10-23 21:29

Sample ID 240407-v8mcqaaa6t
Target Client-built.exe
SHA256 ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45
Tags
office04 quasar 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

ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45

Threat Level: Known bad

The file Client-built.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar family

Quasar RAT

Executes dropped EXE

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 17:39

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

2024-04-07 17:39

Reported

2024-04-07 17:42

Platform

win7-20240221-en

Max time kernel

150s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.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:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A x.tcp.ngrok.io N/A N/A
N/A x.tcp.ngrok.io N/A N/A
N/A x.tcp.ngrok.io N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A 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\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /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 "Quasar Client Startup" /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 x.tcp.ngrok.io udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp

Files

memory/2180-0-0x0000000001340000-0x0000000001664000-memory.dmp

memory/2180-1-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

memory/2180-2-0x000000001B010000-0x000000001B090000-memory.dmp

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

MD5 2aebe66b019df4695fe7218875c93856
SHA1 646890986ef0bba4eed6b659d56704d09e414562
SHA256 ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45
SHA512 7391db69d5cc021dee50b2af12d11b30a4225f46b4469d10eff4e659c71c298233dea01e1e626d35d49b9490ef3dcaa1570b4448859d9d04ac0270b71c84bddc

memory/3040-7-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

memory/3040-9-0x0000000001010000-0x0000000001334000-memory.dmp

memory/2180-8-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

memory/3040-10-0x000000001B5B0000-0x000000001B630000-memory.dmp

memory/3040-11-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

memory/3040-12-0x000000001B5B0000-0x000000001B630000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 17:39

Reported

2024-04-07 17:42

Platform

win10v2004-20231215-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.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:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A x.tcp.ngrok.io N/A N/A
N/A x.tcp.ngrok.io N/A N/A
N/A x.tcp.ngrok.io N/A N/A
N/A x.tcp.ngrok.io N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A 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\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.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 8.8.8.8:53 x.tcp.ngrok.io udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 134.223.125.3.in-addr.arpa udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 17.143.109.104.in-addr.arpa udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 75.249.158.18.in-addr.arpa udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
DE 18.158.249.75:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp
DE 3.125.223.134:16096 x.tcp.ngrok.io tcp

Files

memory/3572-0-0x0000000000B40000-0x0000000000E64000-memory.dmp

memory/3572-1-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp

memory/3572-2-0x000000001BC70000-0x000000001BC80000-memory.dmp

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

MD5 2aebe66b019df4695fe7218875c93856
SHA1 646890986ef0bba4eed6b659d56704d09e414562
SHA256 ea3003e00c6e653fad8844d4677ceef7b7b6e499939ed765a49df3898ddf3c45
SHA512 7391db69d5cc021dee50b2af12d11b30a4225f46b4469d10eff4e659c71c298233dea01e1e626d35d49b9490ef3dcaa1570b4448859d9d04ac0270b71c84bddc

memory/3572-8-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp

memory/2912-10-0x000000001B790000-0x000000001B7A0000-memory.dmp

memory/2912-9-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp

memory/2912-11-0x000000001C610000-0x000000001C660000-memory.dmp

memory/2912-12-0x000000001C720000-0x000000001C7D2000-memory.dmp

memory/2912-13-0x00007FFF0ADE0000-0x00007FFF0B8A1000-memory.dmp

memory/2912-14-0x000000001B790000-0x000000001B7A0000-memory.dmp