Malware Analysis Report

2024-08-06 11:32

Sample ID 240612-fkkrna1erq
Target d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c
SHA256 d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c
Tags
quasar office05 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

d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c

Threat Level: Known bad

The file d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c was found to be: Known bad.

Malicious Activity Summary

quasar office05 spyware trojan

Quasar family

Quasar RAT

Quasar payload

Detects Windows executables referencing non-Windows User-Agents

Detects executables containing common artifacts observed in infostealers

Detects Windows executables referencing non-Windows User-Agents

Detects executables containing common artifacts observed in infostealers

Unsigned PE

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

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
System Information Discovery
T1082
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

2024-06-12 04:55

Signatures

Detects Windows executables referencing non-Windows User-Agents

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

2024-06-12 04:55

Reported

2024-06-12 04:58

Platform

win7-20240611-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
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

Detects executables containing common artifacts observed in infostealers

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

Enumerates physical storage devices

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\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2440 wrote to memory of 2864 N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe C:\Windows\system32\schtasks.exe
PID 2440 wrote to memory of 2864 N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe C:\Windows\system32\schtasks.exe
PID 2440 wrote to memory of 2864 N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe

"C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "esnt Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp

Files

memory/2440-0-0x000007FEF5B53000-0x000007FEF5B54000-memory.dmp

memory/2440-1-0x0000000000D00000-0x0000000000D84000-memory.dmp

memory/2440-2-0x000007FEF5B50000-0x000007FEF653C000-memory.dmp

memory/2440-3-0x000007FEF5B53000-0x000007FEF5B54000-memory.dmp

memory/2440-4-0x000007FEF5B50000-0x000007FEF653C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 04:55

Reported

2024-06-12 04:58

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
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

Detects executables containing common artifacts observed in infostealers

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

Enumerates physical storage devices

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\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1304 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe C:\Windows\SYSTEM32\schtasks.exe
PID 1304 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe

"C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "esnt Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\d8e1f8133b33f2a57c43088d2848c744e9a61aba41d52d019b1eb62fc4b1552c.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp
SG 38.180.9.93:4783 tcp
SG 38.180.9.93:4782 tcp

Files

memory/1304-0-0x00007FF8AF063000-0x00007FF8AF065000-memory.dmp

memory/1304-1-0x0000000000F20000-0x0000000000FA4000-memory.dmp

memory/1304-2-0x00007FF8AF060000-0x00007FF8AFB21000-memory.dmp

memory/1304-3-0x000000001C6A0000-0x000000001C6F0000-memory.dmp

memory/1304-4-0x000000001C7B0000-0x000000001C862000-memory.dmp

memory/1304-5-0x00007FF8AF063000-0x00007FF8AF065000-memory.dmp

memory/1304-6-0x00007FF8AF060000-0x00007FF8AFB21000-memory.dmp