Malware Analysis Report

2025-04-14 04:54

Sample ID 241214-brl6vasndv
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 family

Quasar payload

Quasar RAT

Executes dropped EXE

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-14 01:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-14 01:22

Reported

2024-12-14 01:23

Platform

win10ltsc2021-20241211-en

Max time kernel

17s

Max time network

22s

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 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 72.32.126.40.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 51.11.108.188:443 checkappexec.microsoft.com tcp
US 8.8.8.8:53 188.108.11.51.in-addr.arpa udp
US 8.8.8.8:53 182.129.81.91.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/3624-4-0x00007FFF0B753000-0x00007FFF0B755000-memory.dmp

memory/3624-5-0x0000000000850000-0x0000000000BA2000-memory.dmp

memory/3624-6-0x00007FFF0B750000-0x00007FFF0C212000-memory.dmp

memory/3624-9-0x00007FFF0B750000-0x00007FFF0C212000-memory.dmp

memory/2368-10-0x000000001B1F0000-0x000000001B240000-memory.dmp

memory/2368-11-0x000000001C330000-0x000000001C3E2000-memory.dmp

memory/2368-12-0x000000001B1B0000-0x000000001B1C2000-memory.dmp

memory/2368-13-0x000000001C2B0000-0x000000001C2EC000-memory.dmp