Malware Analysis Report

2025-01-18 04:10

Sample ID 241103-y7z4zatgrj
Target Fps unlocker.exe
SHA256 b70c5aea64d75fc98a82b3c88cfecc6c2856f2a4987f4c1212c3fcf866ec9c9f
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

b70c5aea64d75fc98a82b3c88cfecc6c2856f2a4987f4c1212c3fcf866ec9c9f

Threat Level: Known bad

The file Fps unlocker.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar family

Quasar RAT

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-03 20:26

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

2024-11-03 20:26

Reported

2024-11-03 20:29

Platform

win10ltsc2021-20241023-en

Max time kernel

101s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Fps unlocker.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\Fps unlocker.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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Fps unlocker.exe

"C:\Users\Admin\AppData\Local\Temp\Fps unlocker.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 71.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
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 Inversin-43597.portmap.host udp
DE 193.161.193.99:43597 Inversin-43597.portmap.host 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 99.193.161.193.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

memory/4224-0-0x00007FFD8F9F3000-0x00007FFD8F9F5000-memory.dmp

memory/4224-1-0x00000000001C0000-0x00000000004E4000-memory.dmp

memory/4224-2-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

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

MD5 bf656c2e5e1e942c41fa918132faa7ab
SHA1 1c2ddd815378e54db9e21dd2e61d89067c94da4f
SHA256 b70c5aea64d75fc98a82b3c88cfecc6c2856f2a4987f4c1212c3fcf866ec9c9f
SHA512 54bef34ab722d69f1d3b7f5316f1fbc10fc629bb134f70eecb6a368330b7b73305ef5fa0b9e83c104e6e679ccd1d6e7f5a20caf4f39e6b03d4940b4ed9540b7d

memory/4216-5-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

memory/4224-6-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

memory/4216-7-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

memory/4216-8-0x000000001C790000-0x000000001C7E0000-memory.dmp

memory/4216-9-0x000000001C8A0000-0x000000001C952000-memory.dmp

memory/4216-12-0x000000001C7E0000-0x000000001C7F2000-memory.dmp

memory/4216-13-0x000000001C840000-0x000000001C87C000-memory.dmp

memory/4216-14-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

memory/4216-15-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp