Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-fv482swybz
Target c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146
SHA256 c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146
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

c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146

Threat Level: Known bad

The file c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146 was found to be: Known bad.

Malicious Activity Summary

blihanstealer discovery persistence stealer trojan

BlihanStealer

Blihanstealer family

Executes dropped EXE

Deletes itself

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 05:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 05:12

Reported

2025-02-27 05:15

Platform

win7-20240903-en

Max time kernel

149s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe

"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2548-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0379da994f862a512efb7ec47c2ec3d2
SHA1 d727f6108266066bbe904fd2a24d56a303032e63
SHA256 38de23b5d2bef66e114002d5a3eede6f8c6155b4871ce11f5d9f5787aa251b99
SHA512 01060d9c140316b9601eb10cd31d05ecb7dfaa91f84687c10ba6861382bc3c19ad4a7ce35318bef6f6ea96453c8b6407729906ef80fb888f166911249a0c9d75

memory/2548-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1656-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1656-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 05:12

Reported

2025-02-27 05:15

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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-1-5-21-1479699283-3000499823-2337359760-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe

"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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 150.171.28.10:443 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
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 udp

Files

memory/2728-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0379da994f862a512efb7ec47c2ec3d2
SHA1 d727f6108266066bbe904fd2a24d56a303032e63
SHA256 38de23b5d2bef66e114002d5a3eede6f8c6155b4871ce11f5d9f5787aa251b99
SHA512 01060d9c140316b9601eb10cd31d05ecb7dfaa91f84687c10ba6861382bc3c19ad4a7ce35318bef6f6ea96453c8b6407729906ef80fb888f166911249a0c9d75

memory/2728-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/796-7-0x0000000000400000-0x000000000040E000-memory.dmp