Malware Analysis Report

2025-01-18 04:07

Sample ID 241105-a72e2azpgs
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 RAT

Quasar payload

Quasar family

Executes dropped EXE

Suspicious use of FindShellTrayWindow

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-05 00:52

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-05 00:52

Reported

2024-11-05 00:52

Platform

win10ltsc2021-20241023-en

Max time kernel

34s

Max time network

41s

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

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
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\Desktop\kreo q zi.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.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:\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:\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:\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 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 94.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.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 8.8.8.8:53 203.197.79.204.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 99.193.161.193.in-addr.arpa udp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp

Files

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

MD5 28ac02fc40c8f1c2a8989ee3c09a1372
SHA1 b182758b62a1482142c0fce4be78c786e08b7025
SHA256 0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b
SHA512 2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

memory/2656-4-0x00007FF930FA3000-0x00007FF930FA5000-memory.dmp

memory/2656-5-0x0000000000850000-0x0000000000B74000-memory.dmp

memory/2656-6-0x00007FF930FA0000-0x00007FF931A62000-memory.dmp

memory/2656-11-0x00007FF930FA0000-0x00007FF931A62000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\kreo q zi.exe.log

MD5 b08c36ce99a5ed11891ef6fc6d8647e9
SHA1 db95af417857221948eb1882e60f98ab2914bf1d
SHA256 cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674
SHA512 07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

memory/2920-14-0x0000000002BA0000-0x0000000002BF0000-memory.dmp

memory/2920-15-0x000000001CB30000-0x000000001CBE2000-memory.dmp

memory/2920-18-0x0000000002C30000-0x0000000002C42000-memory.dmp

memory/2920-19-0x000000001CA70000-0x000000001CAAC000-memory.dmp