Malware Analysis Report

2025-04-14 04:54

Sample ID 241213-wyxw5symfn
Target IMVUDineroIlimitado.zip
SHA256 f689e73ba9027c5f1caf115781dd50902c0547fa6d94dd528c017b3542706238
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: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f689e73ba9027c5f1caf115781dd50902c0547fa6d94dd528c017b3542706238

Threat Level: Known bad

The file IMVUDineroIlimitado.zip was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar payload

Quasar family

Quasar RAT

Executes dropped EXE

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious behavior: GetForegroundWindowSpam

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-13 18:20

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-13 18:20

Reported

2024-12-13 18:20

Platform

win10ltsc2021-20241211-en

Max time kernel

18s

Max time network

26s

Command Line

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\IMVUDineroIlimitado.zip"

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\Desktop\IMVUDineroIlimitado.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.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 behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: 35 N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: SeSecurityPrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Program Files\7-Zip\7zFM.exe

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\IMVUDineroIlimitado.zip"

C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe

"C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 checkappexec.microsoft.com udp
GB 51.140.242.104:443 checkappexec.microsoft.com tcp
US 8.8.8.8:53 104.242.140.51.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 azxq0ap.localto.net udp
US 23.158.232.33:3425 azxq0ap.localto.net 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 33.232.158.23.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp

Files

C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe

MD5 507321e95801a8d7833c15613d60fa6f
SHA1 b5805546dbdff837b9a0f6c6e619ef660bb23b97
SHA256 5a3b284cfc49a72f3a28b91aad715c0181c13c10672433323569e92f15afa0c1
SHA512 bd3edf014ed1aed2aac6331307c07997dba8a5fe631cb1209eea7a3f72deb7901cc8175b73832142c9552a510f0e9d9d2cbf65008c961c4e26e992daab4c1dba

memory/416-4-0x00007FFBAD2A3000-0x00007FFBAD2A5000-memory.dmp

memory/416-5-0x00000000000B0000-0x0000000000402000-memory.dmp

memory/416-6-0x00007FFBAD2A0000-0x00007FFBADD62000-memory.dmp

memory/416-9-0x00007FFBAD2A0000-0x00007FFBADD62000-memory.dmp

memory/3104-10-0x000000001BF30000-0x000000001BF80000-memory.dmp

memory/3104-11-0x000000001D110000-0x000000001D1C2000-memory.dmp

memory/3104-12-0x000000001C0C0000-0x000000001C0D2000-memory.dmp

memory/3104-13-0x000000001D050000-0x000000001D08C000-memory.dmp