Malware Analysis Report

2024-10-19 08:35

Sample ID 240729-bdymqaygqc
Target 1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe
SHA256 1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3
Tags
office04 quasar spyware trojan credential_access stealer
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

1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3

Threat Level: Known bad

The file 1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan credential_access stealer

Quasar payload

Quasar RAT

Quasar family

Credentials from Password Stores: Credentials from Web Browsers

Reads user/profile data of web browsers

Executes dropped EXE

Reads WinSCP keys stored on the system

Unsigned PE

Suspicious use of SetWindowsHookEx

Scheduled Task/Job: Scheduled Task

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-29 01:02

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

2024-07-29 01:02

Reported

2024-07-29 19:47

Platform

win7-20240705-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.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:\Users\Admin\AppData\Roaming\browser\edge.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\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\browser\edge.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2852 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Windows\system32\schtasks.exe
PID 2852 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Windows\system32\schtasks.exe
PID 2852 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Windows\system32\schtasks.exe
PID 2852 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Users\Admin\AppData\Roaming\browser\edge.exe
PID 2852 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Users\Admin\AppData\Roaming\browser\edge.exe
PID 2852 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe C:\Users\Admin\AppData\Roaming\browser\edge.exe
PID 2832 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Roaming\browser\edge.exe C:\Windows\system32\schtasks.exe
PID 2832 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Roaming\browser\edge.exe C:\Windows\system32\schtasks.exe
PID 2832 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Roaming\browser\edge.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe

"C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\browser\edge.exe

"C:\Users\Admin\AppData\Roaming\browser\edge.exe"

C:\Windows\system32\schtasks.exe

"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp
DE 193.42.11.9:4329 tcp

Files

memory/2852-0-0x000007FEF5783000-0x000007FEF5784000-memory.dmp

memory/2852-1-0x0000000000250000-0x0000000000574000-memory.dmp

memory/2852-2-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

C:\Users\Admin\AppData\Roaming\browser\edge.exe

MD5 e3e1f7fa42dd68f410bb885f0aefe5e3
SHA1 d51edc519d86a11e6533cd4cac8f190dd3f7d4bb
SHA256 1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3
SHA512 92ac0379074366a4dbb9235d8c61935be6d8086629611dbcdecdaf680a0a8636f7810d4f6394dbdee5b1e463842284ab9855534da4627677965557e8eb609aa3

memory/2832-7-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2832-10-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2852-9-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2832-8-0x0000000000F20000-0x0000000001244000-memory.dmp

memory/2832-11-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

memory/2832-12-0x000007FEF5780000-0x000007FEF616C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-29 01:02

Reported

2024-07-29 19:59

Platform

win10v2004-20240709-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.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

Credentials from Password Stores: Credentials from Web Browsers

credential_access stealer

Executes dropped EXE

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

Reads WinSCP keys stored on the system

spyware stealer

Reads user/profile data of web browsers

spyware stealer

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\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\browser\edge.exe N/A

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe

"C:\Users\Admin\AppData\Local\Temp\1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\browser\edge.exe

"C:\Users\Admin\AppData\Roaming\browser\edge.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Chrome" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\browser\edge.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 2.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
DE 193.42.11.9:4329 tcp
US 8.8.8.8:53 ipwho.is udp
US 8.8.8.8:53 9.11.42.193.in-addr.arpa udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 98.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/1940-0-0x00007FF9253B3000-0x00007FF9253B5000-memory.dmp

memory/1940-1-0x0000000000E40000-0x0000000001164000-memory.dmp

memory/1940-2-0x00007FF9253B0000-0x00007FF925E71000-memory.dmp

C:\Users\Admin\AppData\Roaming\browser\edge.exe

MD5 e3e1f7fa42dd68f410bb885f0aefe5e3
SHA1 d51edc519d86a11e6533cd4cac8f190dd3f7d4bb
SHA256 1d686b05f745875e28939abe357baedd169b59f5a0d8825b602fd803a6303ba3
SHA512 92ac0379074366a4dbb9235d8c61935be6d8086629611dbcdecdaf680a0a8636f7810d4f6394dbdee5b1e463842284ab9855534da4627677965557e8eb609aa3

memory/1940-9-0x00007FF9253B0000-0x00007FF925E71000-memory.dmp

memory/3220-8-0x00007FF9253B0000-0x00007FF925E71000-memory.dmp

memory/3220-10-0x00007FF9253B0000-0x00007FF925E71000-memory.dmp

memory/3220-11-0x0000000002870000-0x00000000028C0000-memory.dmp

memory/3220-12-0x000000001B610000-0x000000001B6C2000-memory.dmp

memory/3220-15-0x0000000002920000-0x0000000002932000-memory.dmp

memory/3220-16-0x000000001B470000-0x000000001B4AC000-memory.dmp

memory/3220-17-0x00007FF9253B0000-0x00007FF925E71000-memory.dmp