Malware Analysis Report

2025-04-13 11:54

Sample ID 240819-ym7nbasgra
Target PepperX.exe
SHA256 fcece45f00b710bd5cb01a2a79781c871f1bd36fac18e00e85bd6452ecd5eadd
Tags
quasar pepperx 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

fcece45f00b710bd5cb01a2a79781c871f1bd36fac18e00e85bd6452ecd5eadd

Threat Level: Known bad

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

Malicious Activity Summary

quasar pepperx spyware trojan

Quasar family

Quasar RAT

Quasar payload

Executes dropped EXE

Drops file in System32 directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Scheduled Task/Job: Scheduled Task

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-19 19:55

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

2024-08-19 19:55

Reported

2024-08-19 19:57

Platform

win7-20240704-en

Max time kernel

125s

Max time network

135s

Command Line

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

Drops file in System32 directory

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

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\SubDir\PepperX.exe

"C:\Windows\system32\SubDir\PepperX.exe"

C:\Windows\system32\schtasks.exe

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

Network

Country Destination Domain Proto
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp

Files

memory/2636-0-0x000007FEF5BC3000-0x000007FEF5BC4000-memory.dmp

memory/2636-1-0x0000000000B60000-0x0000000000E84000-memory.dmp

memory/2636-2-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

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

MD5 2ed601b0043d457f70fff1f1846acebb
SHA1 7c1a93357661d9b7ae82f570db12267b0163dc75
SHA256 fcece45f00b710bd5cb01a2a79781c871f1bd36fac18e00e85bd6452ecd5eadd
SHA512 36abc1f2c857e6d266b8bf7544f9f7bae9d1d8b96487588c0c7bb20f725323d12979831de4616d7af59424b4d2851359b2f2f5e97845585da6e7b18902f90d72

memory/3068-8-0x00000000011B0000-0x00000000014D4000-memory.dmp

memory/3068-10-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/2636-9-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/3068-11-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

memory/3068-12-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-19 19:55

Reported

2024-08-19 19:57

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

152s

Command Line

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

Drops file in System32 directory

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

Suspicious use of SetWindowsHookEx

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

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

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

C:\Windows\system32\SubDir\PepperX.exe

"C:\Windows\system32\SubDir\PepperX.exe"

C:\Windows\SYSTEM32\schtasks.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 73.190.43.125:4782 tcp
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 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 73.190.43.125:4782 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
IE 52.111.236.23:443 tcp
US 8.8.8.8:53 43.229.111.52.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 57.169.31.20.in-addr.arpa udp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp
US 73.190.43.125:4782 tcp

Files

memory/1044-0-0x00007FF8FF573000-0x00007FF8FF575000-memory.dmp

memory/1044-1-0x0000000000660000-0x0000000000984000-memory.dmp

memory/1044-2-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

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

MD5 2ed601b0043d457f70fff1f1846acebb
SHA1 7c1a93357661d9b7ae82f570db12267b0163dc75
SHA256 fcece45f00b710bd5cb01a2a79781c871f1bd36fac18e00e85bd6452ecd5eadd
SHA512 36abc1f2c857e6d266b8bf7544f9f7bae9d1d8b96487588c0c7bb20f725323d12979831de4616d7af59424b4d2851359b2f2f5e97845585da6e7b18902f90d72

memory/3680-10-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\PepperX.exe.log

MD5 baf55b95da4a601229647f25dad12878
SHA1 abc16954ebfd213733c4493fc1910164d825cac8
SHA256 ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
SHA512 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

memory/1044-11-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

memory/3680-12-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

memory/3680-13-0x000000001AF70000-0x000000001AFC0000-memory.dmp

memory/3680-14-0x000000001B8A0000-0x000000001B952000-memory.dmp

memory/3680-15-0x00007FF8FF570000-0x00007FF900031000-memory.dmp