Malware Analysis Report

2024-10-19 08:42

Sample ID 240418-mrnv8aca4s
Target ratXD.exe
SHA256 9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar RAT

Quasar family

Executes dropped EXE

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-18 10:42

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

2024-04-18 10:42

Reported

2024-04-18 10:45

Platform

win7-20240221-en

Max time kernel

128s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ratXD.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
N/A N/A N/A N/A

Executes dropped EXE

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

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A
File opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2172 wrote to memory of 2080 N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe C:\Windows\system32\SubDir\Client.exe
PID 2172 wrote to memory of 2080 N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe C:\Windows\system32\SubDir\Client.exe
PID 2172 wrote to memory of 2080 N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe C:\Windows\system32\SubDir\Client.exe

Processes

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

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

C:\Windows\system32\SubDir\Client.exe

"C:\Windows\system32\SubDir\Client.exe"

Network

Country Destination Domain Proto
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp

Files

memory/2172-0-0x00000000012F0000-0x0000000001614000-memory.dmp

memory/2172-1-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

memory/2172-2-0x000000001B4A0000-0x000000001B520000-memory.dmp

memory/2172-7-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

memory/2080-9-0x0000000001300000-0x0000000001624000-memory.dmp

memory/2080-10-0x000000001B370000-0x000000001B3F0000-memory.dmp

memory/2080-8-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

C:\Windows\system32\SubDir\Client.exe

MD5 04111705ab65d5bc16adf4eeab90011c
SHA1 97442c8671032c8e6bdf1bb086c4557efe40cb9e
SHA256 6705d825bcee1ee4f759c0d8908042516c5871a7dffa00d9adcba15f991e5162
SHA512 eddcab5dcc76831dc55438c2748d4caf2baba711b3042f7c9e27ff49015cd04bd805ff7f1f4c598b90de4ec2796eff2649dc949cdbe491bea40f3f0d8a1d6c1b

memory/2080-11-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp

memory/2080-12-0x000000001B370000-0x000000001B3F0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-18 10:42

Reported

2024-04-18 10:45

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ratXD.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:\Windows\system32\SubDir\Client.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A
File opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2160 wrote to memory of 4688 N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe C:\Windows\system32\SubDir\Client.exe
PID 2160 wrote to memory of 4688 N/A C:\Users\Admin\AppData\Local\Temp\ratXD.exe C:\Windows\system32\SubDir\Client.exe

Processes

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

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

C:\Windows\system32\SubDir\Client.exe

"C:\Windows\system32\SubDir\Client.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3532 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
BR 177.72.82.9:5678 tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
BR 177.72.82.9:5678 tcp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
GB 172.217.169.74:443 tcp
BR 177.72.82.9:5678 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
BR 177.72.82.9:5678 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
BR 177.72.82.9:5678 tcp
US 8.8.8.8:53 9.82.72.177.in-addr.arpa udp
BR 177.72.82.9:5678 tcp
BR 177.72.82.9:5678 tcp
US 8.8.8.8:53 26.173.189.20.in-addr.arpa udp

Files

memory/2160-0-0x0000000000850000-0x0000000000B74000-memory.dmp

memory/2160-1-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

memory/2160-2-0x000000001B770000-0x000000001B780000-memory.dmp

C:\Windows\system32\SubDir\Client.exe

MD5 9c5f2f586e52a975593d11710685f846
SHA1 887006a6849b22cfbf85871e50ab33404097f654
SHA256 9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2
SHA512 c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf

memory/4688-9-0x00000000025A0000-0x00000000025B0000-memory.dmp

memory/4688-8-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

memory/4688-10-0x000000001BBC0000-0x000000001BC10000-memory.dmp

memory/4688-11-0x000000001BCD0000-0x000000001BD82000-memory.dmp

memory/2160-12-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

memory/4688-13-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp

memory/4688-14-0x00000000025A0000-0x00000000025B0000-memory.dmp