Malware Analysis Report

2024-10-23 21:24

Sample ID 240803-see1fa1fqd
Target qqsar.zip
SHA256 8b33b55bfc95d42f71f7a4556bf4ab365cc8a9657a9a48c4184cf8f4fd1cfdf8
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

8b33b55bfc95d42f71f7a4556bf4ab365cc8a9657a9a48c4184cf8f4fd1cfdf8

Threat Level: Known bad

The file qqsar.zip was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Suspicious use of SetWindowsHookEx

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 15:02

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

2024-08-03 15:02

Reported

2024-08-03 15:04

Platform

win7-20240704-en

Max time kernel

126s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.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\windwsupdater.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\qqsarbuilder.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

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

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

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

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
N/A 192.168.174.129:4782 tcp
N/A 192.168.174.129:4782 tcp
N/A 192.168.174.129:4782 tcp
N/A 192.168.174.129:4782 tcp
N/A 192.168.174.129:4782 tcp
N/A 192.168.174.129:4782 tcp

Files

memory/1952-0-0x000007FEF51E3000-0x000007FEF51E4000-memory.dmp

memory/1952-1-0x00000000001A0000-0x00000000004C4000-memory.dmp

memory/1952-2-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

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

MD5 ea1ab6ce5932a3718821475f19feefea
SHA1 5ab97ce62532976abd93ed2cf56662b8ec15606c
SHA256 27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048
SHA512 e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838

memory/1952-8-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

memory/2128-10-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

memory/2128-9-0x0000000001170000-0x0000000001494000-memory.dmp

memory/2128-11-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

memory/2128-12-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 15:02

Reported

2024-08-03 15:03

Platform

win10v2004-20240802-en

Max time kernel

51s

Max time network

54s

Command Line

"C:\Users\Admin\AppData\Local\Temp\qqsarbuilder.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\windwsupdater.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\qqsarbuilder.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\windwsupdater.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
N/A 192.168.174.129:4782 tcp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
N/A 192.168.174.129:4782 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
N/A 192.168.174.129:4782 tcp

Files

memory/1408-0-0x00007FFF5C3A3000-0x00007FFF5C3A5000-memory.dmp

memory/1408-1-0x00000000004A0000-0x00000000007C4000-memory.dmp

memory/1408-2-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp

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

MD5 ea1ab6ce5932a3718821475f19feefea
SHA1 5ab97ce62532976abd93ed2cf56662b8ec15606c
SHA256 27f1a7bab299f2c36793116723e05be58c6edff36c07ba24a2703903cbdd6048
SHA512 e66fa91097b2f725503206bd7e92da486ffd17a9c8fab221387c1d3795e59afedae4fb791b9c530e2e25272a642964e63dc15fe081faed29289c332db8523838

memory/2604-10-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp

memory/1408-9-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp

memory/2604-11-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp

memory/2604-12-0x000000001B3C0000-0x000000001B410000-memory.dmp

memory/2604-13-0x000000001D590000-0x000000001D642000-memory.dmp

memory/2604-14-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp

memory/2604-15-0x00007FFF5C3A0000-0x00007FFF5CE61000-memory.dmp