Malware Analysis Report

2025-01-18 04:08

Sample ID 241104-degrpssama
Target d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe
SHA256 d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
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

d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a

Threat Level: Known bad

The file d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-04 02:55

Signatures

Quasar family

quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-04 02:55

Reported

2024-11-04 02:58

Platform

win7-20240903-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.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:\Windows\system32\ sys64\sys.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Windows\system32\ sys64\sys.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Windows\system32\ sys64\sys.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\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\ sys64\sys.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe

"C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f

C:\Windows\system32\ sys64\sys.exe

"C:\Windows\system32\ sys64\sys.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp
TR 45.95.214.119:1604 tcp

Files

memory/2336-0-0x000007FEF6513000-0x000007FEF6514000-memory.dmp

memory/2336-1-0x0000000000950000-0x0000000000C74000-memory.dmp

memory/2336-2-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

C:\Windows\System32\ sys64\sys.exe

MD5 1eaac929bfec99fbb06cf9871c9093ba
SHA1 d9b10f8785e173e2f210a36dc10db3367a076338
SHA256 d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
SHA512 776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752

memory/2440-8-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/2440-9-0x0000000000870000-0x0000000000B94000-memory.dmp

memory/2336-10-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/2440-11-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

memory/2440-12-0x000007FEF6510000-0x000007FEF6EFC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-04 02:55

Reported

2024-11-04 02:57

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.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:\Windows\system32\ sys64\sys.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Windows\system32\ sys64\sys.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Windows\system32\ sys64\sys.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\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\ sys64\sys.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe

"C:\Users\Admin\AppData\Local\Temp\d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f

C:\Windows\system32\ sys64\sys.exe

"C:\Windows\system32\ sys64\sys.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Windows\system32\ sys64\sys.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
TR 45.95.214.119:1604 tcp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 119.214.95.45.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.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
US 8.8.8.8:53 udp

Files

memory/1680-0-0x00007FF9A4FC3000-0x00007FF9A4FC5000-memory.dmp

memory/1680-1-0x0000000000320000-0x0000000000644000-memory.dmp

memory/1680-2-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

C:\Windows\System32\ sys64\sys.exe

MD5 1eaac929bfec99fbb06cf9871c9093ba
SHA1 d9b10f8785e173e2f210a36dc10db3367a076338
SHA256 d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
SHA512 776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752

memory/3384-9-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

memory/1680-10-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

memory/3384-11-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp

memory/3384-12-0x000000001B7F0000-0x000000001B840000-memory.dmp

memory/3384-13-0x000000001C060000-0x000000001C112000-memory.dmp

memory/3384-16-0x000000001B870000-0x000000001B882000-memory.dmp

memory/3384-17-0x000000001BFE0000-0x000000001C01C000-memory.dmp

memory/3384-18-0x00007FF9A4FC0000-0x00007FF9A5A81000-memory.dmp