Malware Analysis Report

2024-10-23 21:29

Sample ID 240407-v71hysad45
Target Client-built.exe
SHA256 e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7
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

e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Enumerates physical storage devices

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of FindShellTrayWindow

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 17:38

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 17:38

Reported

2024-04-07 17:41

Platform

win7-20240215-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
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 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
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 x.tcp.ngrok.io udp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 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

Files

memory/2836-0-0x00000000003E0000-0x0000000000704000-memory.dmp

memory/2836-1-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

memory/2836-2-0x000000001B0A0000-0x000000001B120000-memory.dmp

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

MD5 3169d3f34b2ce9d94a1bcb0e9ae48600
SHA1 ffec6c71b6c2213be5c4745807de1aedd6a90f20
SHA256 e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7
SHA512 468f5db3cdf3a7a2870a6f78956f80b494520c2d8a589895794f4a5d7c7ea9feb262b7f5466933e8995eb2ddd8e92b72d7fe61f9afa4d89681e24840fc729860

memory/2836-7-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

memory/2940-8-0x00000000012E0000-0x0000000001604000-memory.dmp

memory/2940-9-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

memory/2940-10-0x000000001B270000-0x000000001B2F0000-memory.dmp

memory/2940-11-0x000007FEF5F40000-0x000007FEF692C000-memory.dmp

memory/2940-12-0x000000001B270000-0x000000001B2F0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 17:38

Reported

2024-04-07 17:41

Platform

win10v2004-20240226-en

Max time kernel

146s

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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 216.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.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
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 8.8.8.8:53 159.113.53.23.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
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
DE 18.158.249.75:16096 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 43.56.20.217.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 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 205.142.124.3.in-addr.arpa udp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 x.tcp.ngrok.io tcp
DE 3.124.142.205:16096 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
US 8.8.8.8:53 x.tcp.ngrok.io udp
DE 3.125.209.94:16096 x.tcp.ngrok.io tcp
US 8.8.8.8:53 94.209.125.3.in-addr.arpa udp
DE 3.125.209.94:16096 x.tcp.ngrok.io tcp
DE 3.125.209.94:16096 x.tcp.ngrok.io tcp

Files

memory/4168-0-0x0000000000390000-0x00000000006B4000-memory.dmp

memory/4168-1-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp

memory/4168-2-0x0000000002740000-0x0000000002750000-memory.dmp

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

MD5 3169d3f34b2ce9d94a1bcb0e9ae48600
SHA1 ffec6c71b6c2213be5c4745807de1aedd6a90f20
SHA256 e30519495fc30aca7d914b0628fb21dd89f482856a9bbc70c62d2dbcf18d11b7
SHA512 468f5db3cdf3a7a2870a6f78956f80b494520c2d8a589895794f4a5d7c7ea9feb262b7f5466933e8995eb2ddd8e92b72d7fe61f9afa4d89681e24840fc729860

memory/4168-9-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp

memory/4356-8-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp

memory/4356-10-0x00000000030F0000-0x0000000003100000-memory.dmp

memory/4356-11-0x000000001C920000-0x000000001C970000-memory.dmp

memory/4356-12-0x000000001CA30000-0x000000001CAE2000-memory.dmp

memory/4356-13-0x00007FFF27130000-0x00007FFF27BF1000-memory.dmp

memory/4356-14-0x00000000030F0000-0x0000000003100000-memory.dmp