Malware Analysis Report

2024-10-23 21:24

Sample ID 240805-bns5zssepp
Target 36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe
SHA256 36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522

Threat Level: Known bad

The file 36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-05 01:17

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: behavioral2

Detonation Overview

Submitted

2024-08-05 01:17

Reported

2024-08-05 01:20

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.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\svchost.exe N/A

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\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe

"C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
CA 51.222.21.20:4782 tcp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
CA 51.222.21.20:4782 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
CA 51.222.21.20:4782 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp

Files

memory/2720-0-0x00007FFC3A243000-0x00007FFC3A245000-memory.dmp

memory/2720-1-0x0000000000150000-0x0000000000474000-memory.dmp

memory/2720-2-0x00007FFC3A240000-0x00007FFC3AD01000-memory.dmp

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

MD5 9c682f5b5000cd003e76530706955a72
SHA1 1a69da76e05d114a317342dae3e9c7b10f107d43
SHA256 36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522
SHA512 33bd859542e1ae74d8c81427af44022cb91861dc02ee4202505f1e010487d06cb27e1aa83be6af17be4e2d8973289595b2ebe9bdf99a187956662df30b6dc88f

memory/2720-10-0x00007FFC3A240000-0x00007FFC3AD01000-memory.dmp

memory/876-9-0x00007FFC3A240000-0x00007FFC3AD01000-memory.dmp

memory/876-11-0x000000001E9C0000-0x000000001EA10000-memory.dmp

memory/876-12-0x000000001EAD0000-0x000000001EB82000-memory.dmp

memory/876-13-0x00007FFC3A240000-0x00007FFC3AD01000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-05 01:17

Reported

2024-08-05 01:20

Platform

win7-20240704-en

Max time kernel

126s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.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
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\svchost.exe N/A

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\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2636 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Windows\system32\schtasks.exe
PID 2636 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Windows\system32\schtasks.exe
PID 2636 wrote to memory of 2712 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Windows\system32\schtasks.exe
PID 2636 wrote to memory of 3068 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
PID 2636 wrote to memory of 3068 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
PID 2636 wrote to memory of 3068 N/A C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
PID 3068 wrote to memory of 1232 N/A C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe C:\Windows\system32\schtasks.exe
PID 3068 wrote to memory of 1232 N/A C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe C:\Windows\system32\schtasks.exe
PID 3068 wrote to memory of 1232 N/A C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe

"C:\Users\Admin\AppData\Local\Temp\36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522.exe"

C:\Windows\system32\schtasks.exe

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

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

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

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp
CA 51.222.21.20:4782 tcp

Files

memory/2636-0-0x000007FEF5BC3000-0x000007FEF5BC4000-memory.dmp

memory/2636-1-0x00000000001C0000-0x00000000004E4000-memory.dmp

memory/2636-2-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

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

MD5 9c682f5b5000cd003e76530706955a72
SHA1 1a69da76e05d114a317342dae3e9c7b10f107d43
SHA256 36e6a3dd4bfc86c4e707f43cd9515707442d6c424b7661cb41766cfdca322522
SHA512 33bd859542e1ae74d8c81427af44022cb91861dc02ee4202505f1e010487d06cb27e1aa83be6af17be4e2d8973289595b2ebe9bdf99a187956662df30b6dc88f

memory/3068-8-0x0000000000820000-0x0000000000B44000-memory.dmp

memory/2636-9-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/3068-11-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/3068-10-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/3068-12-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp