Malware Analysis Report

2025-01-18 04:10

Sample ID 241103-lnrl9s1epr
Target 1EAAC929BFEC99FBB06CF9871C9093BA.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 1EAAC929BFEC99FBB06CF9871C9093BA.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-03 09:41

Signatures

Quasar family

quasar

Quasar payload

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-03 09:41

Reported

2024-11-03 09:43

Platform

win7-20241010-en

Max time kernel

147s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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 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
File created C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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\1EAAC929BFEC99FBB06CF9871C9093BA.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\1EAAC929BFEC99FBB06CF9871C9093BA.exe

"C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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

Files

memory/1064-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

memory/1064-1-0x00000000009F0000-0x0000000000D14000-memory.dmp

memory/1064-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

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

MD5 1eaac929bfec99fbb06cf9871c9093ba
SHA1 d9b10f8785e173e2f210a36dc10db3367a076338
SHA256 d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
SHA512 776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752

memory/2800-8-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

memory/2800-9-0x0000000000F40000-0x0000000001264000-memory.dmp

memory/1064-10-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

memory/2800-11-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

memory/2800-12-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-03 09:41

Reported

2024-11-03 09:43

Platform

win10v2004-20241007-en

Max time kernel

135s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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\1EAAC929BFEC99FBB06CF9871C9093BA.exe N/A
File opened for modification C:\Windows\system32\ sys64\sys.exe C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.exe N/A
File opened for modification C:\Windows\system32\ sys64 C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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\1EAAC929BFEC99FBB06CF9871C9093BA.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\1EAAC929BFEC99FBB06CF9871C9093BA.exe

"C:\Users\Admin\AppData\Local\Temp\1EAAC929BFEC99FBB06CF9871C9093BA.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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 66.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.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 55.36.223.20.in-addr.arpa udp

Files

memory/4312-0-0x00007FFC9E503000-0x00007FFC9E505000-memory.dmp

memory/4312-1-0x0000000000AC0000-0x0000000000DE4000-memory.dmp

memory/4312-2-0x00007FFC9E500000-0x00007FFC9EFC1000-memory.dmp

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

MD5 1eaac929bfec99fbb06cf9871c9093ba
SHA1 d9b10f8785e173e2f210a36dc10db3367a076338
SHA256 d08fbce12159858a1e805002d0100ad264d527df79f9c078bcb70737588cb03a
SHA512 776168a0584fdf426c3e26289bcf8f918c63da20b04013b7fc0c920da2620c3e08b1857c13fadf7dc61109d2afc964f6493b2b74e815109238941246db4d0752

memory/1228-9-0x00007FFC9E500000-0x00007FFC9EFC1000-memory.dmp

memory/1228-10-0x00007FFC9E500000-0x00007FFC9EFC1000-memory.dmp

memory/1228-11-0x000000001C0E0000-0x000000001C130000-memory.dmp

memory/1228-12-0x000000001C710000-0x000000001C7C2000-memory.dmp

memory/1228-15-0x000000001BFC0000-0x000000001BFD2000-memory.dmp

memory/1228-16-0x000000001C690000-0x000000001C6CC000-memory.dmp

memory/4312-17-0x00007FFC9E500000-0x00007FFC9EFC1000-memory.dmp

memory/1228-18-0x00007FFC9E500000-0x00007FFC9EFC1000-memory.dmp