Malware Analysis Report

2024-08-06 11:24

Sample ID 240615-2k73va1fnj
Target 6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b
SHA256 6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b
Tags
owenn quasar persistence 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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b

Threat Level: Known bad

The file 6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b was found to be: Known bad.

Malicious Activity Summary

owenn quasar persistence spyware trojan

Quasar family

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Detects executables containing common artifacts observed in infostealers

Quasar RAT

Detects Windows executables referencing non-Windows User-Agents

Quasar payload

Detects Windows executables referencing non-Windows User-Agents

Detects executables containing common artifacts observed in infostealers

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Executes dropped EXE

Adds Run key to start application

Unsigned PE

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of SetWindowsHookEx

Suspicious use of FindShellTrayWindow

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Modify Registry
T1112
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

2024-06-15 22:39

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Detects executables containing common artifacts observed in infostealers

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

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

2024-06-15 22:39

Reported

2024-06-15 22:42

Platform

win7-20240508-en

Max time kernel

150s

Max time network

135s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.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

Detects Windows executables referencing non-Windows User-Agents

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Detects executables containing common artifacts observed in infostealers

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:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\Service Host: Engine = "\"C:\\Users\\Admin\\AppData\\Roaming\\GameFile\\Fortnite.exe\"" C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\Service Host: Engine = "\"C:\\Users\\Admin\\AppData\\Roaming\\GameFile\\Fortnite.exe\"" C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.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\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1368 wrote to memory of 1912 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Windows\system32\schtasks.exe
PID 1368 wrote to memory of 1912 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Windows\system32\schtasks.exe
PID 1368 wrote to memory of 1912 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Windows\system32\schtasks.exe
PID 1368 wrote to memory of 1608 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe
PID 1368 wrote to memory of 1608 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe
PID 1368 wrote to memory of 1608 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe
PID 1608 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe C:\Windows\system32\schtasks.exe
PID 1608 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe C:\Windows\system32\schtasks.exe
PID 1608 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe

"C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Service Host: Engine" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe

"C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Service Host: Engine" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp

Files

memory/1368-0-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

memory/1368-1-0x00000000002F0000-0x0000000000624000-memory.dmp

memory/1368-2-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe

MD5 dbdfb779556b39424d70176ff2bc5c76
SHA1 ea818c26ffcc9cd2cc1524573b1aadeea9f22edd
SHA256 6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b
SHA512 6064b0566f97d07974d660ebe1b7f6601581882ff73326ee15591c5ae0e0010c8ad7cf897af8945a3889d02148f0b4d4ba02daea2c6322d1b261db93f0370fe4

memory/1368-8-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

memory/1608-9-0x0000000000180000-0x00000000004B4000-memory.dmp

memory/1608-11-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

memory/1608-10-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

memory/1608-12-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 22:39

Reported

2024-06-15 22:42

Platform

win10v2004-20240226-en

Max time kernel

143s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.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

Detects Windows executables referencing non-Windows User-Agents

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Detects executables containing common artifacts observed in infostealers

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\GameFile\Fortnite.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Service Host: Engine = "\"C:\\Users\\Admin\\AppData\\Roaming\\GameFile\\Fortnite.exe\"" C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Service Host: Engine = "\"C:\\Users\\Admin\\AppData\\Roaming\\GameFile\\Fortnite.exe\"" C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.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\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4752 wrote to memory of 4448 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4752 wrote to memory of 4448 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4752 wrote to memory of 2384 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe
PID 4752 wrote to memory of 2384 N/A C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe
PID 2384 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2384 wrote to memory of 2160 N/A C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe

"C:\Users\Admin\AppData\Local\Temp\6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Service Host: Engine" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe

"C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Service Host: Engine" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe" /rl HIGHEST /f

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=3820 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
N/A 192.168.0.15:4782 tcp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 31.121.18.2.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
US 8.8.8.8:53 216.131.50.23.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
N/A 192.168.0.15:4782 tcp
N/A 192.168.0.15:4782 tcp
US 8.8.8.8:53 63.141.182.52.in-addr.arpa udp
N/A 192.168.0.15:4782 tcp

Files

memory/4752-0-0x00007FFD774B3000-0x00007FFD774B5000-memory.dmp

memory/4752-1-0x0000000000CB0000-0x0000000000FE4000-memory.dmp

memory/4752-2-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp

C:\Users\Admin\AppData\Roaming\GameFile\Fortnite.exe

MD5 dbdfb779556b39424d70176ff2bc5c76
SHA1 ea818c26ffcc9cd2cc1524573b1aadeea9f22edd
SHA256 6e2a82833646e95bd6d98557c8f9746a8b8ae6a1c7cb1f713b475ee36d6c146b
SHA512 6064b0566f97d07974d660ebe1b7f6601581882ff73326ee15591c5ae0e0010c8ad7cf897af8945a3889d02148f0b4d4ba02daea2c6322d1b261db93f0370fe4

memory/2384-9-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp

memory/4752-10-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp

memory/2384-11-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp

memory/2384-12-0x0000000003070000-0x00000000030C0000-memory.dmp

memory/2384-13-0x000000001C2E0000-0x000000001C392000-memory.dmp

memory/2384-14-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp

memory/2384-15-0x00007FFD774B0000-0x00007FFD77F71000-memory.dmp