Malware Analysis Report

2024-10-23 21:24

Sample ID 240803-l47y7avemh
Target ia.exe
SHA256 19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b
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

19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 10:06

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

2024-08-03 10:06

Reported

2024-08-03 10:08

Platform

win7-20240708-en

Max time kernel

149s

Max time network

135s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ia.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\ia\Client.exe N/A

Drops file in System32 directory

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

Scheduled Task/Job: Scheduled Task

persistence execution
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\ia.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\ia\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

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

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

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

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp

Files

memory/552-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

memory/552-1-0x0000000000DC0000-0x00000000010E4000-memory.dmp

memory/552-2-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

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

MD5 5828b4f3710d309100812b3f698a34c2
SHA1 64c5979a98bc2855bdc440d9fc669d5f63cfaa9f
SHA256 19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b
SHA512 2888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127

memory/552-8-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

memory/1112-9-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

memory/1112-10-0x00000000011C0000-0x00000000014E4000-memory.dmp

memory/1112-11-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

memory/1112-12-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 10:06

Reported

2024-08-03 10:08

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ia.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\ia\Client.exe N/A

Drops file in System32 directory

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

Scheduled Task/Job: Scheduled Task

persistence execution
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\ia.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\ia\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
N/A 192.168.1.184:4782 tcp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
N/A 192.168.1.184:4782 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
N/A 192.168.1.184:4782 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
N/A 192.168.1.184:4782 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp
N/A 192.168.1.184:4782 tcp

Files

memory/3424-0-0x00007FF90F253000-0x00007FF90F255000-memory.dmp

memory/3424-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp

memory/3424-2-0x00007FF90F250000-0x00007FF90FD11000-memory.dmp

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

MD5 5828b4f3710d309100812b3f698a34c2
SHA1 64c5979a98bc2855bdc440d9fc669d5f63cfaa9f
SHA256 19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b
SHA512 2888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127

memory/3424-10-0x00007FF90F250000-0x00007FF90FD11000-memory.dmp

memory/1644-9-0x00007FF90F250000-0x00007FF90FD11000-memory.dmp

memory/1644-11-0x00007FF90F250000-0x00007FF90FD11000-memory.dmp

memory/1644-12-0x000000001BCB0000-0x000000001BD00000-memory.dmp

memory/1644-13-0x000000001C580000-0x000000001C632000-memory.dmp

memory/1644-14-0x00007FF90F250000-0x00007FF90FD11000-memory.dmp