Malware Analysis Report

2024-09-11 08:42

Sample ID 240424-vbxr7add76
Target 2.exe
SHA256 622eb7f513f2999023de32ec55a870615ce803a1257aacf578fad9a30e9868ae
Tags
cheat 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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

622eb7f513f2999023de32ec55a870615ce803a1257aacf578fad9a30e9868ae

Threat Level: Known bad

The file 2.exe was found to be: Known bad.

Malicious Activity Summary

cheat quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Suspicious use of FindShellTrayWindow

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

2024-04-24 16:49

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

2024-04-24 16:49

Reported

2024-04-24 16:52

Platform

win7-20240220-en

Max time kernel

148s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2.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\2.exe N/A
File opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\2.exe 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
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\2.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 WriteProcessMemory

Description Indicator Process Target
PID 2924 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\schtasks.exe
PID 2924 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\schtasks.exe
PID 2924 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\schtasks.exe
PID 2924 wrote to memory of 2976 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\SubDir\Client.exe
PID 2924 wrote to memory of 2976 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\SubDir\Client.exe
PID 2924 wrote to memory of 2976 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\SubDir\Client.exe
PID 2976 wrote to memory of 2492 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2976 wrote to memory of 2492 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2976 wrote to memory of 2492 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\2.exe

"C:\Users\Admin\AppData\Local\Temp\2.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f

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

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

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp

Files

memory/2924-0-0x00000000010E0000-0x0000000001404000-memory.dmp

memory/2924-1-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

memory/2924-2-0x000000001B380000-0x000000001B400000-memory.dmp

C:\Windows\System32\SubDir\Client.exe

MD5 14b9f6d037e6e93587e57a3994adde10
SHA1 d8908477f992b88e9fdf4dc2cd11b885835a4b95
SHA256 622eb7f513f2999023de32ec55a870615ce803a1257aacf578fad9a30e9868ae
SHA512 99ad579f38020f65f12dca3967e642c221451923ae9c59749b50389ca4bfb0600e6b8a99c5ad350b41094be10f5d6bfb6e0ddb23c8368c56ad83ae5f7a83c1d6

memory/2924-8-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

memory/2976-7-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

memory/2976-9-0x0000000000DC0000-0x00000000010E4000-memory.dmp

memory/2976-10-0x0000000000A60000-0x0000000000AE0000-memory.dmp

memory/2976-11-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

memory/2976-12-0x0000000000A60000-0x0000000000AE0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-24 16:49

Reported

2024-04-24 16:52

Platform

win10v2004-20240412-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2.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\2.exe N/A
File opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\2.exe 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
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\2.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 WriteProcessMemory

Description Indicator Process Target
PID 2076 wrote to memory of 1848 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2076 wrote to memory of 1848 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2076 wrote to memory of 4668 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\SubDir\Client.exe
PID 2076 wrote to memory of 4668 N/A C:\Users\Admin\AppData\Local\Temp\2.exe C:\Windows\system32\SubDir\Client.exe
PID 4668 wrote to memory of 2476 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4668 wrote to memory of 2476 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\2.exe

"C:\Users\Admin\AppData\Local\Temp\2.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
N/A 192.168.178.23:4782 tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 67.32.209.4.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 48.251.17.2.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
N/A 127.0.0.1:4782 tcp
N/A 192.168.178.23:4782 tcp
N/A 127.0.0.1:4782 tcp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

memory/2076-0-0x00000000009E0000-0x0000000000D04000-memory.dmp

memory/2076-1-0x00007FFBD8CD0000-0x00007FFBD9791000-memory.dmp

memory/2076-2-0x000000001BA10000-0x000000001BA20000-memory.dmp

C:\Windows\System32\SubDir\Client.exe

MD5 14b9f6d037e6e93587e57a3994adde10
SHA1 d8908477f992b88e9fdf4dc2cd11b885835a4b95
SHA256 622eb7f513f2999023de32ec55a870615ce803a1257aacf578fad9a30e9868ae
SHA512 99ad579f38020f65f12dca3967e642c221451923ae9c59749b50389ca4bfb0600e6b8a99c5ad350b41094be10f5d6bfb6e0ddb23c8368c56ad83ae5f7a83c1d6

memory/2076-8-0x00007FFBD8CD0000-0x00007FFBD9791000-memory.dmp

memory/4668-9-0x00007FFBD8CD0000-0x00007FFBD9791000-memory.dmp

memory/4668-10-0x000000001BD30000-0x000000001BD40000-memory.dmp

memory/4668-11-0x000000001C6D0000-0x000000001C720000-memory.dmp

memory/4668-12-0x000000001C7E0000-0x000000001C892000-memory.dmp

memory/4668-13-0x00007FFBD8CD0000-0x00007FFBD9791000-memory.dmp

memory/4668-14-0x000000001BD30000-0x000000001BD40000-memory.dmp