Malware Analysis Report

2024-10-23 21:28

Sample ID 240407-wbdjzsab2t
Target Client-built.exe
SHA256 eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7
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

eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7

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

Enumerates physical storage devices

Unsigned PE

Creates scheduled task(s)

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 17:44

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 17:44

Reported

2024-04-07 17:49

Platform

win7-20231129-en

Max time kernel

149s

Max time network

147s

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 2.tcp.eu.ngrok.io N/A N/A
N/A 2.tcp.eu.ngrok.io N/A N/A
N/A 2.tcp.eu.ngrok.io N/A N/A
N/A 2.tcp.eu.ngrok.io N/A N/A
N/A 2.tcp.eu.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 2.tcp.eu.ngrok.io udp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 3.127.138.57:16096 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
DE 18.197.239.5:16096 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 18.156.13.209:16096 2.tcp.eu.ngrok.io tcp
DE 18.156.13.209:16096 2.tcp.eu.ngrok.io tcp
DE 18.156.13.209:16096 tcp

Files

memory/1724-0-0x0000000000AF0000-0x0000000000E14000-memory.dmp

memory/1724-1-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

memory/1724-2-0x000000001B260000-0x000000001B2E0000-memory.dmp

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

MD5 293e5793dea329af168463e35950c84a
SHA1 790fb958938ab09415b8c61deb0d164a24dad596
SHA256 eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7
SHA512 0b5cd07cb0f8aa1a74a864c737d4447c0bd370cbbfe07d3014c2ec7a355bae5df84674238d105396a30dc37c0c0606870d0dc4f69f1068c849ceb72cae0c39a7

memory/1056-8-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

memory/1056-7-0x00000000011A0000-0x00000000014C4000-memory.dmp

memory/1724-9-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

memory/1056-10-0x00000000010E0000-0x0000000001160000-memory.dmp

memory/1056-11-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

memory/1056-12-0x00000000010E0000-0x0000000001160000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 17:44

Reported

2024-04-07 17:49

Platform

win10v2004-20240226-en

Max time kernel

92s

Max time network

142s

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 2.tcp.eu.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
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
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
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
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 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 3.126.37.18:16096 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 18.37.126.3.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/3388-0-0x0000000000CA0000-0x0000000000FC4000-memory.dmp

memory/3388-1-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp

memory/3388-2-0x000000001BDA0000-0x000000001BDB0000-memory.dmp

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

MD5 293e5793dea329af168463e35950c84a
SHA1 790fb958938ab09415b8c61deb0d164a24dad596
SHA256 eddbc56dadb4921c99e30d4637b61238b6b2188b5db86f47bc720cbbb5b15bc7
SHA512 0b5cd07cb0f8aa1a74a864c737d4447c0bd370cbbfe07d3014c2ec7a355bae5df84674238d105396a30dc37c0c0606870d0dc4f69f1068c849ceb72cae0c39a7

memory/1916-9-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp

memory/3388-8-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp

memory/1916-10-0x000000001B540000-0x000000001B550000-memory.dmp

memory/1916-11-0x000000001C120000-0x000000001C170000-memory.dmp

memory/1916-12-0x000000001C230000-0x000000001C2E2000-memory.dmp

memory/1916-16-0x000000001CD30000-0x000000001CD6C000-memory.dmp

memory/1916-15-0x000000001C1B0000-0x000000001C1C2000-memory.dmp

memory/1916-17-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp