Malware Analysis Report

2025-06-15 19:58

Sample ID 250226-y4rnesslt9
Target 18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72
SHA256 18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72
Tags
blihanstealer discovery persistence stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72

Threat Level: Known bad

The file 18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72 was found to be: Known bad.

Malicious Activity Summary

blihanstealer discovery persistence stealer trojan

BlihanStealer

Blihanstealer family

Deletes itself

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-26 20:20

Signatures

Blihanstealer family

blihanstealer

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-26 20:20

Reported

2025-02-26 20:23

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe"

Signatures

BlihanStealer

trojan stealer blihanstealer

Blihanstealer family

blihanstealer

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\microsofthelp.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe

"C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
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

Files

memory/1760-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 1c4f970793de1acb708ffc838dcd9bfa
SHA1 554d399058dae0925f4ed665d0bf7706cf3cd68c
SHA256 927ce5b7518e2aff3bc981f70bd4f36c81581d210e49db6a25f1e81ff4ad531d
SHA512 7787a8cb2004daf2704a1c10f0d64301c1648a2e8aa30bc0693351a233ae8a9da6e826a9114c8394d11ee7cf9bf384bb001081074c252ecb70c3e71896c578b4

memory/1760-4-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2792-6-0x0000000000400000-0x000000000040F000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-26 20:20

Reported

2025-02-26 20:23

Platform

win7-20240903-en

Max time kernel

149s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe"

Signatures

BlihanStealer

trojan stealer blihanstealer

Blihanstealer family

blihanstealer

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe

"C:\Users\Admin\AppData\Local\Temp\18f145ad8f4134cde0d4856d18cbadec834a8d4ab25851f1661e7958c2526f72.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1372-0-0x0000000000400000-0x000000000040F000-memory.dmp

memory/1372-6-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 1c4f970793de1acb708ffc838dcd9bfa
SHA1 554d399058dae0925f4ed665d0bf7706cf3cd68c
SHA256 927ce5b7518e2aff3bc981f70bd4f36c81581d210e49db6a25f1e81ff4ad531d
SHA512 7787a8cb2004daf2704a1c10f0d64301c1648a2e8aa30bc0693351a233ae8a9da6e826a9114c8394d11ee7cf9bf384bb001081074c252ecb70c3e71896c578b4

memory/1680-9-0x0000000000400000-0x000000000040F000-memory.dmp