Malware Analysis Report

2025-01-18 04:35

Sample ID 240108-lzgw7sfedn
Target Client.exe
SHA256 96a244b32e73bac08510839a1137c41941ff4b18b1171c9fde09d0603b2477a7
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

96a244b32e73bac08510839a1137c41941ff4b18b1171c9fde09d0603b2477a7

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-08 09:58

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

2024-01-08 09:58

Reported

2024-01-08 10:00

Platform

win7-20231129-en

Max time kernel

124s

Max time network

137s

Command Line

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

Signatures

Executes dropped EXE

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

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.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\ფოტოტესტ.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

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

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

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

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
N/A 192.168.1.4:4782 tcp
N/A 192.168.1.4:4782 tcp
N/A 192.168.1.4:4782 tcp
N/A 192.168.1.4:4782 tcp
N/A 192.168.1.4:4782 tcp
N/A 192.168.1.4:4782 tcp

Files

memory/2940-0-0x00000000008F0000-0x0000000000C14000-memory.dmp

memory/2940-1-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

memory/2940-2-0x000000001B3E0000-0x000000001B460000-memory.dmp

memory/2732-10-0x000000001B2C0000-0x000000001B340000-memory.dmp

memory/2732-9-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

memory/2732-8-0x00000000000D0000-0x00000000003F4000-memory.dmp

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

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

MD5 c8abd26559861b903b53868a9e09ab3b
SHA1 ffb5f63654ccd69cfcfe2d2db5de776ce760e37d
SHA256 f0d08899d003bc9a68b18a867943006cf0ab7cdbe30a0eb43d7956313d369c8c
SHA512 3ffa12f56a2be47152495d47d99eecffa81d41ca6a410e3b3b0999fc69e436f2839eff09ba592c2e606ef4d19f0ee27a4e1c2db2232d8105fbef93ce2d765bd5

memory/2940-11-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

memory/2732-12-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-08 09:58

Reported

2024-01-08 10:01

Platform

win10v2004-20231215-en

Max time kernel

151s

Max time network

176s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
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.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3304 wrote to memory of 3136 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3304 wrote to memory of 3136 N/A C:\Users\Admin\AppData\Local\Temp\Client.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 2.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 195.233.44.23.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 137.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 16.234.44.23.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 4.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 11.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/3304-0-0x0000000000E00000-0x0000000001124000-memory.dmp

memory/3304-1-0x00007FF8C22F0000-0x00007FF8C2DB1000-memory.dmp

memory/3304-2-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

memory/3304-3-0x00007FF8C22F0000-0x00007FF8C2DB1000-memory.dmp

memory/3304-5-0x000000001BFA0000-0x000000001BFB0000-memory.dmp