Malware Analysis Report

2025-01-18 04:12

Sample ID 241031-awqjdsvgmj
Target 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
SHA256 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
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

6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd

Threat Level: Known bad

The file 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 00:34

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

2024-10-31 00:33

Reported

2024-10-31 00:36

Platform

win7-20240903-en

Max time kernel

150s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.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

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\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe N/A
Token: SeDebugPrivilege 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 2212 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Windows\system32\schtasks.exe
PID 2212 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Windows\system32\schtasks.exe
PID 2212 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Windows\system32\schtasks.exe
PID 2212 wrote to memory of 2708 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2212 wrote to memory of 2708 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2212 wrote to memory of 2708 N/A C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2708 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2708 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2708 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe

"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe"

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp

Files

memory/2212-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

memory/2212-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

memory/2212-2-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

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

MD5 8e2f41a8da48ee3bb6d533d7de12d621
SHA1 4b4f1bbfc8e8570668b55f1157791879fc272a6b
SHA256 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
SHA512 fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0

memory/2212-8-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

memory/2708-9-0x00000000011B0000-0x00000000014D4000-memory.dmp

memory/2708-11-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

memory/2708-10-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

memory/2708-12-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 00:33

Reported

2024-10-31 00:37

Platform

win10v2004-20241007-en

Max time kernel

135s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.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

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\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe N/A
Token: SeDebugPrivilege 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\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe

"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 226.108.222.173.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 192.168.1.116:4782 tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
N/A 192.168.1.116:4782 tcp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 101.11.19.2.in-addr.arpa udp
N/A 192.168.1.116:4782 tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
N/A 192.168.1.116:4782 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
N/A 192.168.1.116:4782 tcp
N/A 192.168.1.116:4782 tcp

Files

memory/2340-0-0x00007FFA8A943000-0x00007FFA8A945000-memory.dmp

memory/2340-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp

memory/2340-2-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

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

MD5 8e2f41a8da48ee3bb6d533d7de12d621
SHA1 4b4f1bbfc8e8570668b55f1157791879fc272a6b
SHA256 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
SHA512 fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0

memory/2340-9-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

memory/4836-10-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

memory/4836-11-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

memory/4836-12-0x000000001B6C0000-0x000000001B710000-memory.dmp

memory/4836-13-0x000000001C000000-0x000000001C0B2000-memory.dmp

memory/4836-14-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp