Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-g36yaaysa1
Target d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619
SHA256 d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619
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: 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

d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619

Threat Level: Known bad

The file d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619 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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-27 06:20

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 06:20

Reported

2025-02-27 06:23

Platform

win7-20240903-en

Max time kernel

149s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.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\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe

"C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1992-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1992-7-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 e9ada38348a179de7c735ed7c3203004
SHA1 ed4c9f965646b15205b912f79a85d22257b31a55
SHA256 fe8254be303bae095bac2a1cfd940be9b579ecfcf3ae3a879aeeac86ae2ecf7c
SHA512 d06efaaabeb48ea1c1c9777f76b7076ab7a13d9596399b48698481b9c3a1796288bd0712d0c7d5dd899e5ce27465075680e8fd6574fbd04be3ba1962d7849d9c

memory/332-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/332-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 06:20

Reported

2025-02-27 06:23

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.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\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.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:\Windows\microsofthelp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe

"C:\Users\Admin\AppData\Local\Temp\d9316e28af4c5e2b53f3abc9205d11079eed8f0e59e4ce404fea96768f00a619.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
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 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp
US 150.171.27.10:443 g.bing.com tcp

Files

memory/4008-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 e9ada38348a179de7c735ed7c3203004
SHA1 ed4c9f965646b15205b912f79a85d22257b31a55
SHA256 fe8254be303bae095bac2a1cfd940be9b579ecfcf3ae3a879aeeac86ae2ecf7c
SHA512 d06efaaabeb48ea1c1c9777f76b7076ab7a13d9596399b48698481b9c3a1796288bd0712d0c7d5dd899e5ce27465075680e8fd6574fbd04be3ba1962d7849d9c

memory/4008-4-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1424-6-0x0000000000400000-0x000000000040E000-memory.dmp