Malware Analysis Report

2025-04-14 04:54

Sample ID 241213-l3yn5avld1
Target testingfile.exe
SHA256 cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77
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

cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77

Threat Level: Known bad

The file testingfile.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

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-13 10:04

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

2024-12-13 10:04

Reported

2024-12-13 10:06

Platform

win7-20241010-en

Max time kernel

148s

Max time network

155s

Command Line

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

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\testingfile.exe

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "wod2" /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 "wod2" /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 testinghigger-42471.portmap.host udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp

Files

memory/2804-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

memory/2804-1-0x0000000001350000-0x0000000001674000-memory.dmp

memory/2804-2-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

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

MD5 4489c3282400ad9e96ea5ca7c28e6369
SHA1 91a2016778cce0e880636d236efca38cf0a7713d
SHA256 cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77
SHA512 adaeab8aa666057ff008e86f96ae6b9a36ff2f276fdd49f6663c300357f3dc10f59fac7700bb385aa35887918a830e18bddaa41b3305d913566f58aa428a72b0

memory/2804-8-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/3060-9-0x00000000003C0000-0x00000000006E4000-memory.dmp

memory/3060-10-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/3060-11-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

memory/3060-12-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-13 10:04

Reported

2024-12-13 10:06

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

155s

Command Line

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

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\testingfile.exe

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "wod2" /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 "wod2" /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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 testinghigger-42471.portmap.host udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 99.193.161.193.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
DE 193.161.193.99:42471 testinghigger-42471.portmap.host tcp
US 8.8.8.8:53 udp

Files

memory/4060-0-0x00007FFC04313000-0x00007FFC04315000-memory.dmp

memory/4060-1-0x0000000000040000-0x0000000000364000-memory.dmp

memory/4060-2-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

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

MD5 4489c3282400ad9e96ea5ca7c28e6369
SHA1 91a2016778cce0e880636d236efca38cf0a7713d
SHA256 cc68b1903e22d22e6f0a29bcdf46825d5c57747d8eb3a75672a4d6930f60fe77
SHA512 adaeab8aa666057ff008e86f96ae6b9a36ff2f276fdd49f6663c300357f3dc10f59fac7700bb385aa35887918a830e18bddaa41b3305d913566f58aa428a72b0

memory/4296-10-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

memory/4060-9-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

memory/4296-11-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

memory/4296-12-0x000000001D7F0000-0x000000001D840000-memory.dmp

memory/4296-13-0x000000001D900000-0x000000001D9B2000-memory.dmp

memory/4296-14-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp