Malware Analysis Report

2024-09-11 08:42

Sample ID 240424-vc2sjadd93
Target 3.exe
SHA256 e2d93565c15b8860ad9e138c97a2bfe0f5824ece31b01aa6a808c7209026124d
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

e2d93565c15b8860ad9e138c97a2bfe0f5824ece31b01aa6a808c7209026124d

Threat Level: Known bad

The file 3.exe was found to be: Known bad.

Malicious Activity Summary

cheat quasar spyware trojan

Quasar RAT

Quasar payload

Quasar family

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

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 16:51

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 16:51

Reported

2024-04-24 16:54

Platform

win7-20240221-en

Max time kernel

130s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3.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\3.exe N/A
File opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\3.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\3.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 2504 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\schtasks.exe
PID 2504 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\schtasks.exe
PID 2504 wrote to memory of 2844 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\schtasks.exe
PID 2504 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\SubDir\Client.exe
PID 2504 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\SubDir\Client.exe
PID 2504 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\SubDir\Client.exe
PID 2760 wrote to memory of 2532 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2760 wrote to memory of 2532 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\system32\schtasks.exe
PID 2760 wrote to memory of 2532 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\3.exe

"C:\Users\Admin\AppData\Local\Temp\3.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
DE 194.36.25.8:4782 tcp
DE 194.36.25.8:4782 tcp
DE 194.36.25.8:4782 tcp
DE 194.36.25.8:4782 tcp
DE 194.36.25.8:4782 tcp
DE 194.36.25.8:4782 tcp

Files

memory/2504-0-0x0000000000B90000-0x0000000000EB4000-memory.dmp

memory/2504-1-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

memory/2504-2-0x000000001B220000-0x000000001B2A0000-memory.dmp

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

MD5 9dd823f73a5c5ffbf121b9e4d482235b
SHA1 417ab7794cbc8f81c7906daf12cd068c89967038
SHA256 e2d93565c15b8860ad9e138c97a2bfe0f5824ece31b01aa6a808c7209026124d
SHA512 27d052951958525902bf99b8d1997b8a50e8c8d1c55cca68c3a253cceabf0e2a8cf2ae8b8283e850debb6a010bc971a4e8106d5504e5cb939b609da129089a9f

memory/2504-7-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

memory/2760-9-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

memory/2760-8-0x0000000000DF0000-0x0000000001114000-memory.dmp

memory/2760-10-0x000000001B2E0000-0x000000001B360000-memory.dmp

memory/2760-11-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

memory/2760-12-0x000000001B2E0000-0x000000001B360000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-24 16:51

Reported

2024-04-24 16:54

Platform

win10v2004-20240412-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3.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 opened for modification C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\3.exe N/A
File created C:\Windows\system32\SubDir\Client.exe C:\Users\Admin\AppData\Local\Temp\3.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\3.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 4420 wrote to memory of 4972 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4420 wrote to memory of 4972 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\SYSTEM32\schtasks.exe
PID 4420 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\SubDir\Client.exe
PID 4420 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\3.exe C:\Windows\system32\SubDir\Client.exe
PID 3780 wrote to memory of 1540 N/A C:\Windows\system32\SubDir\Client.exe C:\Windows\SYSTEM32\schtasks.exe
PID 3780 wrote to memory of 1540 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\3.exe

"C:\Users\Admin\AppData\Local\Temp\3.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 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 198.32.209.4.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
US 8.8.8.8:53 98.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 48.251.17.2.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
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 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
DE 194.36.25.8:4782 tcp
US 8.8.8.8:53 73.239.69.13.in-addr.arpa udp
DE 194.36.25.8:4782 tcp

Files

memory/4420-0-0x0000000000330000-0x0000000000654000-memory.dmp

memory/4420-1-0x00007FF9706B0000-0x00007FF971171000-memory.dmp

memory/4420-2-0x0000000002990000-0x00000000029A0000-memory.dmp

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

MD5 9dd823f73a5c5ffbf121b9e4d482235b
SHA1 417ab7794cbc8f81c7906daf12cd068c89967038
SHA256 e2d93565c15b8860ad9e138c97a2bfe0f5824ece31b01aa6a808c7209026124d
SHA512 27d052951958525902bf99b8d1997b8a50e8c8d1c55cca68c3a253cceabf0e2a8cf2ae8b8283e850debb6a010bc971a4e8106d5504e5cb939b609da129089a9f

memory/4420-8-0x00007FF9706B0000-0x00007FF971171000-memory.dmp

memory/3780-9-0x00007FF9706B0000-0x00007FF971171000-memory.dmp

memory/3780-10-0x000000001B370000-0x000000001B380000-memory.dmp

memory/3780-11-0x000000001BE20000-0x000000001BE70000-memory.dmp

memory/3780-12-0x000000001BF30000-0x000000001BFE2000-memory.dmp

memory/3780-13-0x00007FF9706B0000-0x00007FF971171000-memory.dmp

memory/3780-14-0x000000001B370000-0x000000001B380000-memory.dmp