Malware Analysis Report

2025-01-18 04:06

Sample ID 241030-yf49lszgql
Target dontopenit.exe
SHA256 83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99
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

83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar family

Quasar payload

Quasar RAT

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-30 19:44

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

2024-10-30 19:44

Reported

2024-10-30 19:47

Platform

win7-20240708-en

Max time kernel

149s

Max time network

135s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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\SubDir\Client.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dontopenit.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

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

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

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

Network

Country Destination Domain Proto
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp
N/A 192.168.0.110:4782 tcp

Files

memory/2412-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

memory/2412-1-0x0000000000CE0000-0x0000000001004000-memory.dmp

memory/2412-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 7fd77d009a68f6f02a75522b7e4a6313
SHA1 a9b761e5fa44b73e1c25c20c841c83218d101263
SHA256 83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99
SHA512 536af6029f0abda5cb9ac8091da76c06f15523a10c0cf62760e10afc8baa6ea87189f3d2a3b2b60e730143f300fafc7d19b840ae699e2a288856c389095670f0

memory/1792-8-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

memory/1792-7-0x0000000000F50000-0x0000000001274000-memory.dmp

memory/1792-9-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

memory/2412-10-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

memory/1792-11-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-30 19:44

Reported

2024-10-30 19:46

Platform

win10v2004-20241007-en

Max time kernel

76s

Max time network

85s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar family

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:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dontopenit.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1468 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\dontopenit.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 1468 wrote to memory of 2652 N/A C:\Users\Admin\AppData\Local\Temp\dontopenit.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Processes

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

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

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 192.168.0.110:4782 tcp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
N/A 192.168.0.110:4782 tcp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
N/A 192.168.0.110:4782 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
N/A 192.168.0.110:4782 tcp

Files

memory/1468-0-0x00007FFF15563000-0x00007FFF15565000-memory.dmp

memory/1468-1-0x0000000000410000-0x0000000000734000-memory.dmp

memory/1468-2-0x00007FFF15560000-0x00007FFF16021000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 7fd77d009a68f6f02a75522b7e4a6313
SHA1 a9b761e5fa44b73e1c25c20c841c83218d101263
SHA256 83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99
SHA512 536af6029f0abda5cb9ac8091da76c06f15523a10c0cf62760e10afc8baa6ea87189f3d2a3b2b60e730143f300fafc7d19b840ae699e2a288856c389095670f0

memory/2652-8-0x00007FFF15560000-0x00007FFF16021000-memory.dmp

memory/1468-9-0x00007FFF15560000-0x00007FFF16021000-memory.dmp

memory/2652-10-0x00007FFF15560000-0x00007FFF16021000-memory.dmp

memory/2652-11-0x000000001C1A0000-0x000000001C1F0000-memory.dmp

memory/2652-12-0x000000001C2B0000-0x000000001C362000-memory.dmp

memory/2652-13-0x00007FFF15560000-0x00007FFF16021000-memory.dmp