Malware Analysis Report

2024-10-19 08:35

Sample ID 240731-3dsv1stepc
Target test.exe
SHA256 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62
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 Overview

score
10/10

SHA256

b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62

Threat Level: Known bad

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

Malicious Activity Summary

quasar office04 spyware trojan

Quasar RAT

Quasar payload

Quasar family

Executes dropped EXE

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-31 23:24

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

2024-07-31 23:24

Reported

2024-07-31 23:26

Platform

win10v2004-20240730-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\test.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

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\test.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\test.exe

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "BootstrapperV1.11" /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 "BootstrapperV1.11" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
N/A 192.168.1.28:4782 tcp
N/A 192.168.1.28:4782 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
N/A 192.168.1.28:4782 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
N/A 192.168.1.28:4782 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
N/A 192.168.1.28:4782 tcp
N/A 192.168.1.28:4782 tcp
US 8.8.8.8:53 11.179.89.13.in-addr.arpa udp

Files

memory/2836-0-0x00007FFA511B3000-0x00007FFA511B5000-memory.dmp

memory/2836-1-0x0000000000240000-0x0000000000564000-memory.dmp

memory/2836-2-0x00007FFA511B0000-0x00007FFA51C71000-memory.dmp

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

MD5 7c57eda4bef5b6a6f5ca084dde31deb7
SHA1 8ed5f1f48691e8d3d5e910b1fd46d0ce0d30eb1e
SHA256 b8d24236cb542dd0358707623e485d1f8f5b917103f88e7de9d81356a8bd0a62
SHA512 22d5be1c470f673b7a89ccb972c9b907eb76a070246d071550d891d52d2e4eba2a14df6924b98e1d866ad216e02e3a7cc368f545a578dfe6eaffec461abefe5d

memory/2836-8-0x00007FFA511B0000-0x00007FFA51C71000-memory.dmp

memory/5056-9-0x00007FFA511B0000-0x00007FFA51C71000-memory.dmp

memory/5056-10-0x00007FFA511B0000-0x00007FFA51C71000-memory.dmp

memory/5056-11-0x00000000028D0000-0x0000000002920000-memory.dmp

memory/5056-12-0x000000001BC80000-0x000000001BD32000-memory.dmp

memory/5056-13-0x00007FFA511B0000-0x00007FFA51C71000-memory.dmp