Malware Analysis Report

2025-01-03 07:45

Sample ID 230421-hh2nhagd9y
Target tmp19dwk3tr
SHA256 5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081
Tags
blustealer collection stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

5923a0d6ac3cd029ce06706021aaaff83c55193a23c2d5fedd5b3cdd0065b081

Threat Level: Known bad

The file tmp19dwk3tr was found to be: Known bad.

Malicious Activity Summary

blustealer collection stealer

BluStealer

Accesses Microsoft Outlook profiles

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

outlook_office_path

outlook_win_path

Script User-Agent

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-04-21 06:45

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-04-21 06:45

Reported

2023-04-21 06:47

Platform

win7-20230220-en

Max time kernel

69s

Max time network

33s

Command Line

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

Signatures

BluStealer

stealer blustealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1336 set thread context of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1440 set thread context of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1336 wrote to memory of 1440 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1440 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Network

N/A

Files

memory/1336-54-0x00000000013D0000-0x00000000014B6000-memory.dmp

memory/1336-55-0x0000000004E00000-0x0000000004E40000-memory.dmp

memory/1336-56-0x0000000000420000-0x0000000000432000-memory.dmp

memory/1336-57-0x0000000004E00000-0x0000000004E40000-memory.dmp

memory/1336-58-0x0000000000430000-0x000000000043C000-memory.dmp

memory/1336-59-0x0000000005C70000-0x0000000005D1C000-memory.dmp

memory/1336-60-0x0000000004F30000-0x0000000004FA6000-memory.dmp

memory/1440-61-0x0000000000400000-0x000000000046E000-memory.dmp

memory/1440-62-0x0000000000400000-0x000000000046E000-memory.dmp

memory/1440-63-0x0000000000400000-0x000000000046E000-memory.dmp

memory/1440-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1440-66-0x0000000000400000-0x000000000046E000-memory.dmp

memory/1440-68-0x0000000000400000-0x000000000046E000-memory.dmp

memory/1336-70-0x0000000004E05000-0x0000000004E23000-memory.dmp

memory/1440-72-0x0000000000400000-0x000000000046E000-memory.dmp

memory/2024-73-0x00000000000F0000-0x0000000000156000-memory.dmp

memory/2024-74-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

memory/2024-75-0x00000000000F0000-0x0000000000156000-memory.dmp

memory/2024-77-0x00000000000F0000-0x0000000000156000-memory.dmp

memory/2024-79-0x00000000000F0000-0x0000000000156000-memory.dmp

memory/2024-81-0x0000000000E20000-0x0000000000E60000-memory.dmp

memory/2024-80-0x00000000047B0000-0x000000000486C000-memory.dmp

memory/1440-82-0x0000000000400000-0x000000000046E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-04-21 06:45

Reported

2023-04-21 06:47

Platform

win10v2004-20230220-en

Max time kernel

149s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

Signatures

BluStealer

stealer blustealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1896 set thread context of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 2404 set thread context of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Enumerates physical storage devices

Script User-Agent

Description Indicator Process Target
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 1896 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe
PID 2404 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 2404 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 2404 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 2404 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 2404 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe

"C:\Users\Admin\AppData\Local\Temp\tmp19dwk3tr.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.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 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 20.189.173.4:443 tcp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 44.8.109.52.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 22.249.124.192.in-addr.arpa udp

Files

memory/1896-133-0x0000000000850000-0x0000000000936000-memory.dmp

memory/1896-134-0x0000000005A70000-0x0000000006014000-memory.dmp

memory/1896-135-0x00000000054C0000-0x0000000005552000-memory.dmp

memory/1896-136-0x00000000054B0000-0x00000000054C0000-memory.dmp

memory/1896-137-0x00000000054B0000-0x00000000054C0000-memory.dmp

memory/1896-138-0x00000000080B0000-0x000000000814C000-memory.dmp

memory/1896-140-0x00000000054B0000-0x00000000054C0000-memory.dmp

memory/2404-139-0x0000000000400000-0x000000000046E000-memory.dmp

memory/2404-143-0x0000000000400000-0x000000000046E000-memory.dmp

memory/2404-146-0x0000000000400000-0x000000000046E000-memory.dmp

memory/4236-147-0x0000000001160000-0x00000000011C6000-memory.dmp

memory/4236-148-0x00000000057A0000-0x00000000057B0000-memory.dmp