Malware Analysis Report

2024-10-19 06:33

Sample ID 240526-j11plach58
Target Quasar.exe
SHA256 43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e
Tags
quasar spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e

Threat Level: Known bad

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

Malicious Activity Summary

quasar spyware trojan

Quasar payload

Quasar family

Quasar RAT

Drops file in System32 directory

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SendNotifyMessage

Suspicious use of FindShellTrayWindow

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Modifies registry class

Suspicious use of SetWindowsHookEx

Suspicious behavior: AddClipboardFormatListener

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-26 08:08

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

2024-05-26 08:08

Reported

2024-05-26 08:10

Platform

win10v2004-20240426-en

Max time kernel

60s

Max time network

34s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00002.jrs C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk C:\Windows\System32\svchost.exe N/A
File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat C:\Windows\System32\svchost.exe N/A
File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.chk C:\Windows\System32\svchost.exe N/A
File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jcp C:\Windows\System32\svchost.exe N/A
File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.log C:\Windows\System32\svchost.exe N/A
File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSS.jtx C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSStmp.log C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSSres00001.jrs C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.jfm C:\Windows\System32\svchost.exe N/A
File created C:\Windows\system32\config\systemprofile\AppData\Local\DataSharing\Storage\DSTokenDB2.dat C:\Windows\System32\svchost.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000_Classes\Local Settings C:\Windows\system32\mspaint.exe N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files\VideoLAN\VLC\vlc.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\mspaint.exe N/A
N/A N/A C:\Windows\system32\mspaint.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Program Files\VideoLAN\VLC\vlc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Quasar.exe N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\mspaint.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Program Files\VideoLAN\VLC\vlc.exe N/A

Processes

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

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

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x2fc 0x150

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\mspaint.exe

"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Pictures\My Wallpaper.jpg" /ForceBootstrapPaint3D

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s DsSvc

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

C:\Program Files\VideoLAN\VLC\vlc.exe

"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Music\AddMerge.mp3"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp

Files

memory/532-0-0x0000021867EC0000-0x0000021867FF8000-memory.dmp

memory/532-1-0x00007FFCD9673000-0x00007FFCD9675000-memory.dmp

memory/532-2-0x00007FFCD9670000-0x00007FFCDA131000-memory.dmp

memory/532-3-0x00007FFCD9670000-0x00007FFCDA131000-memory.dmp

memory/2740-8-0x000002A02BF90000-0x000002A02BFA0000-memory.dmp

memory/2740-4-0x000002A02BF50000-0x000002A02BF60000-memory.dmp

memory/2740-15-0x000002A034BE0000-0x000002A034BE1000-memory.dmp

memory/2740-17-0x000002A034C60000-0x000002A034C61000-memory.dmp

memory/2740-19-0x000002A034C60000-0x000002A034C61000-memory.dmp

memory/2740-20-0x000002A034CF0000-0x000002A034CF1000-memory.dmp

memory/2740-21-0x000002A034CF0000-0x000002A034CF1000-memory.dmp

memory/2740-22-0x000002A034D00000-0x000002A034D01000-memory.dmp

memory/2740-23-0x000002A034D00000-0x000002A034D01000-memory.dmp

memory/4940-48-0x00007FFCE8B30000-0x00007FFCE8B64000-memory.dmp

memory/4940-47-0x00007FF66A390000-0x00007FF66A488000-memory.dmp

memory/4940-49-0x00007FFCD3FA0000-0x00007FFCD4256000-memory.dmp