Malware Analysis Report

2024-08-06 11:25

Sample ID 240616-akebzsvdkq
Target Server.exe
SHA256 f5acec48afbdd2a4850462e4613ce91c983bc3a3498c69a306a4ca12ccd15de0
Tags
stealer quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f5acec48afbdd2a4850462e4613ce91c983bc3a3498c69a306a4ca12ccd15de0

Threat Level: Known bad

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

Malicious Activity Summary

stealer quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-16 00:15

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

2024-06-16 00:15

Reported

2024-06-16 00:18

Platform

win10-20240404-en

Max time kernel

134s

Max time network

145s

Command Line

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

Signatures

Quasar RAT

trojan spyware 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\AppData\Roaming\WD\Runtime Broker.exe N/A

Creates scheduled task(s)

persistence
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: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Server.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1888 wrote to memory of 4892 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1888 wrote to memory of 4892 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1888 wrote to memory of 836 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe
PID 1888 wrote to memory of 836 N/A C:\Users\Admin\AppData\Local\Temp\Server.exe C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe
PID 836 wrote to memory of 3908 N/A C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe C:\Windows\SYSTEM32\schtasks.exe
PID 836 wrote to memory of 3908 N/A C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe

"C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 battery-stripes.gl.at.ply.gg udp
US 147.185.221.20:26129 battery-stripes.gl.at.ply.gg tcp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 168.117.168.52.in-addr.arpa udp

Files

memory/1888-0-0x00007FF91EBF3000-0x00007FF91EBF4000-memory.dmp

memory/1888-1-0x00000000007A0000-0x0000000000AC4000-memory.dmp

memory/1888-2-0x00007FF91EBF0000-0x00007FF91F5DC000-memory.dmp

C:\Users\Admin\AppData\Roaming\WD\Runtime Broker.exe

MD5 e45a6c438c6ab1538b44fc43a242a5d3
SHA1 00a85654779955ca989d1f2907ea1831b2511688
SHA256 f5acec48afbdd2a4850462e4613ce91c983bc3a3498c69a306a4ca12ccd15de0
SHA512 806783dfc96b3a97c11675236d31f10c6540668e6149ab158eea680b0f84248b7b25ba4f36b4790250459b87e2b0bc91d551b07a79e236c8a4356df4f3878a6f

memory/836-10-0x00007FF91EBF0000-0x00007FF91F5DC000-memory.dmp

memory/1888-9-0x00007FF91EBF0000-0x00007FF91F5DC000-memory.dmp

memory/836-11-0x00007FF91EBF0000-0x00007FF91F5DC000-memory.dmp

memory/836-12-0x000000001BC80000-0x000000001BCD0000-memory.dmp

memory/836-13-0x000000001C420000-0x000000001C4D2000-memory.dmp

memory/836-16-0x000000001BD00000-0x000000001BD12000-memory.dmp

memory/836-17-0x000000001C3A0000-0x000000001C3DE000-memory.dmp

memory/836-18-0x00007FF91EBF0000-0x00007FF91F5DC000-memory.dmp