Malware Analysis Report

2025-01-18 04:25

Sample ID 231222-3cc36sdfej
Target aabb.exe
SHA256 644b2903e1c8b5d6b63335e409b1d624e1bdf620de4bacab2d54c0bef69e5dae
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 Overview

score
10/10

SHA256

644b2903e1c8b5d6b63335e409b1d624e1bdf620de4bacab2d54c0bef69e5dae

Threat Level: Known bad

The file aabb.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Unsigned PE

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-22 23:21

Signatures

Quasar family

quasar

Quasar payload

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 23:21

Reported

2023-12-22 23:26

Platform

win10v2004-20231215-en

Max time kernel

191s

Max time network

250s

Command Line

"C:\Users\Admin\AppData\Local\Temp\aabb.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Creates scheduled task(s)

persistence
Description Indicator Process Target
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\aabb.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3776 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Local\Temp\aabb.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3776 wrote to memory of 2516 N/A C:\Users\Admin\AppData\Local\Temp\aabb.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\aabb.exe

"C:\Users\Admin\AppData\Local\Temp\aabb.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Counter Strike Global Offensive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 2.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 91.16.208.104.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp

Files

memory/3776-0-0x0000000000D80000-0x00000000010A4000-memory.dmp

memory/3776-1-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

memory/3776-2-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

memory/3776-4-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

memory/3776-5-0x000000001BFA0000-0x000000001BFB0000-memory.dmp