Malware Analysis Report

2025-01-18 04:09

Sample ID 241031-hj7adatakm
Target Client-built3.exe
SHA256 f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
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 Overview

score
10/10

SHA256

f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be

Threat Level: Known bad

The file Client-built3.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar family

Quasar RAT

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 06:47

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

2024-10-31 06:47

Reported

2024-10-31 06:49

Platform

win10ltsc2021-20241023-en

Max time kernel

126s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built3.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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

Enumerates physical storage devices

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\Client-built3.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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Client-built3.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built3.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 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 fd.api.iris.microsoft.com udp
FR 20.199.58.43:443 fd.api.iris.microsoft.com tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
N/A 10.127.0.200:4782 tcp
N/A 10.127.0.200:4782 tcp

Files

memory/2156-0-0x00007FFB52CA3000-0x00007FFB52CA5000-memory.dmp

memory/2156-1-0x00000000007C0000-0x0000000000AE4000-memory.dmp

memory/2156-2-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp

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

MD5 0ba12b4cf0e785325ef57b8addc70899
SHA1 6ebc9ef072f738e0d89a286f08e359ceacff0095
SHA256 f8f2be9448bb64d2d67b6b9f724e5668a1584831aece7d49f9956b283aca77be
SHA512 5badb694a5318058f8d016258bc8c50886e8ebf753b97a95116dfb66e39061297ede0228aa9fa95b3f0614d70326aafb0f8bad4318993ef05f288e4a249a6889

memory/2260-6-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp

memory/2156-5-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp

memory/2260-7-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp

memory/2260-8-0x000000001D0C0000-0x000000001D110000-memory.dmp

memory/2260-9-0x000000001D1D0000-0x000000001D282000-memory.dmp

memory/2260-10-0x00007FFB52CA0000-0x00007FFB53762000-memory.dmp