Malware Analysis Report

2025-04-13 12:14

Sample ID 240329-1f3rwsac9x
Target 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
SHA256 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
Tags
1st 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

4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a

Threat Level: Known bad

The file 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a was found to be: Known bad.

Malicious Activity Summary

1st quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of SendNotifyMessage

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-29 21:36

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

2024-03-29 21:36

Reported

2024-03-29 21:38

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.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\softgui.exe N/A

Enumerates physical storage devices

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\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe

"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 218.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
TR 94.156.8.44:4787 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 44.8.156.94.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 219.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/2204-0-0x0000000000680000-0x00000000009A4000-memory.dmp

memory/2204-1-0x00007FFD93AC0000-0x00007FFD94581000-memory.dmp

memory/2204-2-0x0000000002AD0000-0x0000000002AE0000-memory.dmp

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

MD5 b05ef4b68b309f9aefa705d3c0ab50e1
SHA1 ffbf50f019be8426868b616960713fa4f596905c
SHA256 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
SHA512 e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b

memory/4656-9-0x00007FFD93AC0000-0x00007FFD94581000-memory.dmp

memory/2204-10-0x00007FFD93AC0000-0x00007FFD94581000-memory.dmp

memory/4656-11-0x0000000001990000-0x00000000019A0000-memory.dmp

memory/4656-12-0x000000001CA70000-0x000000001CAC0000-memory.dmp

memory/4656-13-0x000000001CB80000-0x000000001CC32000-memory.dmp

memory/4656-16-0x000000001CB00000-0x000000001CB12000-memory.dmp

memory/4656-17-0x000000001D790000-0x000000001D7CC000-memory.dmp

memory/4656-18-0x000000001D480000-0x000000001D582000-memory.dmp

memory/4656-20-0x00007FFD93AC0000-0x00007FFD94581000-memory.dmp

memory/4656-21-0x0000000001990000-0x00000000019A0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-29 21:36

Reported

2024-03-29 21:38

Platform

win11-20240221-en

Max time kernel

146s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.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\softgui.exe N/A

Enumerates physical storage devices

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\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe

"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
TR 94.156.8.44:4787 tcp
US 8.8.8.8:53 44.8.156.94.in-addr.arpa udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 218.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp

Files

memory/3028-0-0x0000000000550000-0x0000000000874000-memory.dmp

memory/3028-1-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

memory/3028-2-0x000000001B500000-0x000000001B510000-memory.dmp

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

MD5 b05ef4b68b309f9aefa705d3c0ab50e1
SHA1 ffbf50f019be8426868b616960713fa4f596905c
SHA256 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
SHA512 e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b

memory/3028-9-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

memory/4532-10-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

memory/4532-11-0x0000000001930000-0x0000000001940000-memory.dmp

memory/4532-12-0x000000001CC40000-0x000000001CC90000-memory.dmp

memory/4532-13-0x000000001CD50000-0x000000001CE02000-memory.dmp

memory/4532-16-0x000000001CCE0000-0x000000001CCF2000-memory.dmp

memory/4532-17-0x000000001D460000-0x000000001D49C000-memory.dmp

memory/4532-18-0x00007FFADE450000-0x00007FFADEF12000-memory.dmp

memory/4532-19-0x0000000001930000-0x0000000001940000-memory.dmp