Malware Analysis Report

2025-01-18 04:08

Sample ID 241105-e4yl7axkeq
Target kreo q zi.7z
SHA256 282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd
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

282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

Threat Level: Known bad

The file kreo q zi.7z 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 SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-05 04:30

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-05 04:30

Reported

2024-11-05 04:31

Platform

win10ltsc2021-20241023-en

Max time kernel

67s

Max time network

77s

Command Line

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\kreo q zi.7z"

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\kreo q zi.exe N/A
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 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\kreo q zi.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.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\Client.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\kreo q zi.7z"

C:\Users\Admin\Desktop\kreo q zi.exe

"C:\Users\Admin\Desktop\kreo q zi.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 checkappexec.microsoft.com udp
GB 51.140.244.186:443 checkappexec.microsoft.com tcp
US 8.8.8.8:53 203.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 hola435-24858.portmap.host udp
DE 193.161.193.99:24858 hola435-24858.portmap.host 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 99.193.161.193.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp

Files

C:\Users\Admin\Desktop\kreo q zi.exe

MD5 28ac02fc40c8f1c2a8989ee3c09a1372
SHA1 b182758b62a1482142c0fce4be78c786e08b7025
SHA256 0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b
SHA512 2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

memory/384-4-0x00007FFDE0783000-0x00007FFDE0785000-memory.dmp

memory/384-5-0x0000000000D40000-0x0000000001064000-memory.dmp

memory/384-6-0x00007FFDE0780000-0x00007FFDE1242000-memory.dmp

memory/384-9-0x00007FFDE0780000-0x00007FFDE1242000-memory.dmp

memory/2696-10-0x000000001BB20000-0x000000001BB70000-memory.dmp

memory/2696-11-0x000000001CD70000-0x000000001CE22000-memory.dmp

memory/2696-14-0x000000001CCB0000-0x000000001CCC2000-memory.dmp

memory/2696-15-0x000000001CD10000-0x000000001CD4C000-memory.dmp