Malware Analysis Report

2025-06-15 19:58

Sample ID 250226-1eznvatwhx
Target 32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276
SHA256 32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276
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

32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276

Threat Level: Known bad

The file 32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276 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 21:34

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-26 21:34

Reported

2025-02-26 21:37

Platform

win7-20240903-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.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\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe

"C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2340-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 7a644ba1af8eb316d261bb8843c9d146
SHA1 e01b94f956d5cb46b01abc3c5826a33ac332c346
SHA256 c848347f3b98ddd885b05a5e836145f134e8d756af5eb4f571df4e6c18ec7b4b
SHA512 3c9956d7a67800a66613e933c5e56ed1e227cd5df4b9c19314e054f37347ee72787e4704c3350da37c7c1c91737729e38e52cbe7b95849012424679da25c978a

memory/2340-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2088-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2088-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-26 21:34

Reported

2025-02-26 21:37

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.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-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\HidePlugin.dll C:\Windows\microsofthelp.exe N/A
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.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\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.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\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe

"C:\Users\Admin\AppData\Local\Temp\32743f83afd0069e55e4f803c38697cbde900b856cbee3ae7596098af4452276.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 150.171.28.10:443 tcp
US 150.171.28.10:443 tcp
US 150.171.28.10:443 tse1.mm.bing.net 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

Files

memory/220-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 7a644ba1af8eb316d261bb8843c9d146
SHA1 e01b94f956d5cb46b01abc3c5826a33ac332c346
SHA256 c848347f3b98ddd885b05a5e836145f134e8d756af5eb4f571df4e6c18ec7b4b
SHA512 3c9956d7a67800a66613e933c5e56ed1e227cd5df4b9c19314e054f37347ee72787e4704c3350da37c7c1c91737729e38e52cbe7b95849012424679da25c978a

memory/220-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2968-7-0x0000000000400000-0x000000000040E000-memory.dmp