Malware Analysis Report

2024-10-19 08:41

Sample ID 240418-rbnyhagb7t
Target Client-built.exe
SHA256 30369ff4ed77a2cf2fd35a32c876a222cca094e7db7344051dc881e982908e95
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

30369ff4ed77a2cf2fd35a32c876a222cca094e7db7344051dc881e982908e95

Threat Level: Known bad

The file Client-built.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-18 14:01

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

2024-04-18 14:01

Reported

2024-04-18 14:04

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

154s

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\Client.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\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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4436 wrote to memory of 4352 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 4436 wrote to memory of 4352 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.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\Client.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
N/A 192.168.254.152:4782 tcp
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 65.139.73.23.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
N/A 192.168.254.152:4782 tcp
US 8.8.8.8:53 93.65.42.20.in-addr.arpa udp

Files

memory/4436-0-0x0000000000700000-0x0000000000A24000-memory.dmp

memory/4436-1-0x00007FFF3D1B0000-0x00007FFF3DC71000-memory.dmp

memory/4436-2-0x000000001B780000-0x000000001B790000-memory.dmp

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

MD5 af13ce84d2a5ee2ab7854af2d6571ab1
SHA1 bf082b48f3bd45f8e6c55a7e897f5171181fad61
SHA256 30369ff4ed77a2cf2fd35a32c876a222cca094e7db7344051dc881e982908e95
SHA512 e501e34e108a99a8a82560b20baccdd3746f5713a0fbaa37a209ff1daacf6637022c5bfd35ff25efdc9adbf7ddf72e7882cf300d076f1ab0886174437e801d56

memory/4352-10-0x000000001B990000-0x000000001B9A0000-memory.dmp

memory/4436-9-0x00007FFF3D1B0000-0x00007FFF3DC71000-memory.dmp

memory/4352-8-0x00007FFF3D1B0000-0x00007FFF3DC71000-memory.dmp

memory/4352-11-0x000000001C3D0000-0x000000001C420000-memory.dmp

memory/4352-12-0x000000001C4E0000-0x000000001C592000-memory.dmp

memory/4352-13-0x00007FFF3D1B0000-0x00007FFF3DC71000-memory.dmp

memory/4352-14-0x000000001B990000-0x000000001B9A0000-memory.dmp