Malware Analysis Report

2025-04-13 11:57

Sample ID 240818-14z1xa1amq
Target 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
SHA256 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
Tags
skids 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

844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983

Threat Level: Known bad

The file 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983 was found to be: Known bad.

Malicious Activity Summary

skids quasar spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-18 22:12

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

2024-08-18 22:12

Reported

2024-08-18 22:15

Platform

win7-20240704-en

Max time kernel

148s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.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\Windows\Windows Host Process.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.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\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2436 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\schtasks.exe
PID 2436 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\schtasks.exe
PID 2436 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\schtasks.exe
PID 2436 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 2436 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 2436 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe C:\Windows\system32\Windows\Windows Host Process.exe
PID 2104 wrote to memory of 596 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe
PID 2104 wrote to memory of 596 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe
PID 2104 wrote to memory of 596 N/A C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe

"C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe"

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp

Files

memory/2436-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

memory/2436-1-0x0000000000B50000-0x0000000000EB0000-memory.dmp

memory/2436-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

C:\Windows\System32\Windows\Windows Host Process.exe

MD5 bc04ef1699a3b490ff2703a0bb2dcca0
SHA1 b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
SHA256 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
SHA512 e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1

memory/2104-11-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

memory/2104-10-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

memory/2436-9-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

memory/2104-8-0x0000000000170000-0x00000000004D0000-memory.dmp

memory/2104-12-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-18 22:12

Reported

2024-08-18 22:15

Platform

win10v2004-20240802-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.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\Windows\Windows Host Process.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\Windows C:\Windows\system32\Windows\Windows Host Process.exe N/A
File created C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe C:\Windows\system32\Windows\Windows Host Process.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\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\Windows\Windows Host Process.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe

"C:\Users\Admin\AppData\Local\Temp\844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

C:\Windows\system32\Windows\Windows Host Process.exe

"C:\Windows\system32\Windows\Windows Host Process.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 22.221.185.147.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 147.185.221.22:10340 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/744-0-0x00007FFE509A3000-0x00007FFE509A5000-memory.dmp

memory/744-1-0x0000000000070000-0x00000000003D0000-memory.dmp

memory/744-2-0x00007FFE509A0000-0x00007FFE51461000-memory.dmp

C:\Windows\System32\Windows\Windows Host Process.exe

MD5 bc04ef1699a3b490ff2703a0bb2dcca0
SHA1 b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
SHA256 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
SHA512 e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1

memory/744-9-0x00007FFE509A0000-0x00007FFE51461000-memory.dmp

memory/4888-10-0x00007FFE509A0000-0x00007FFE51461000-memory.dmp

memory/4888-11-0x00007FFE509A0000-0x00007FFE51461000-memory.dmp

memory/4888-12-0x000000001B480000-0x000000001B4D0000-memory.dmp

memory/4888-13-0x000000001BE20000-0x000000001BED2000-memory.dmp

memory/4888-16-0x00007FFE509A0000-0x00007FFE51461000-memory.dmp