Malware Analysis Report

2024-10-23 21:24

Sample ID 240802-jqyggsshml
Target Client-built.exe
SHA256 84a0907e7e112b593f99f0a7440eb3d74e71bf7dfe19d27c298a28042acf5e19
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

84a0907e7e112b593f99f0a7440eb3d74e71bf7dfe19d27c298a28042acf5e19

Threat Level: Known bad

The file Client-built.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

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-02 07:53

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

2024-08-02 07:53

Reported

2024-08-02 07:56

Platform

win10v2004-20240730-en

Max time kernel

150s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.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\test.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\test.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4840 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\test.exe
PID 4840 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\test.exe

Processes

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

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

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

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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k LocalService -p -s fdPHost

Network

Country Destination Domain Proto
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
SK 95.103.111.116:4782 tcp
SK 95.103.111.116:4782 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
SK 95.103.111.116:4782 tcp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
SK 95.103.111.116:4782 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
SK 95.103.111.116:4782 tcp
N/A 239.255.255.250:3702 udp
N/A 239.255.255.250:3702 udp
US 8.8.8.8:53 c.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa udp
SK 95.103.111.116:4782 tcp
SK 95.103.111.116:4782 tcp

Files

memory/4840-0-0x00007FF99B3D3000-0x00007FF99B3D5000-memory.dmp

memory/4840-1-0x0000000000970000-0x0000000000C94000-memory.dmp

memory/4840-2-0x00007FF99B3D0000-0x00007FF99BE91000-memory.dmp

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

MD5 89211e15b473db84cfd447e3dbb4fdcd
SHA1 1d861ff885aa2cd8dc11f01f1a0d202410349fa3
SHA256 84a0907e7e112b593f99f0a7440eb3d74e71bf7dfe19d27c298a28042acf5e19
SHA512 5fc2f8f646732efc65ab6d9cb94e9365d241f22fd30e586d8524bde3d7c37d700d32e0bae2faf762b75e98a3d799747f45cd724c2cadc36085645c7a97bcd671

memory/2948-8-0x00007FF99B3D0000-0x00007FF99BE91000-memory.dmp

memory/4840-9-0x00007FF99B3D0000-0x00007FF99BE91000-memory.dmp

memory/2948-10-0x00007FF99B3D0000-0x00007FF99BE91000-memory.dmp

memory/2948-11-0x000000001C780000-0x000000001C7D0000-memory.dmp

memory/2948-12-0x000000001C890000-0x000000001C942000-memory.dmp

memory/2948-13-0x00007FF99B3D0000-0x00007FF99BE91000-memory.dmp

memory/2948-14-0x000000001D3C0000-0x000000001D8E8000-memory.dmp