Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-cggn2szzhs
Target 8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705
SHA256 8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705
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

8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705

Threat Level: Known bad

The file 8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705 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

2025-02-27 02:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 02:02

Reported

2025-02-27 02:05

Platform

win7-20240903-en

Max time kernel

149s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe

"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2972-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2972-3-0x0000000000220000-0x000000000022E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 90747e0ac18a12a342ef42a5bd53e13a
SHA1 f4d72ea7fecac722d8e6e675c0921326e72b3652
SHA256 aa7e99c3f93266bd5c99baf381db538843b0be191de5f0c5ff94b195f6c95ce4
SHA512 0eb7ad8b7092f6f0338ab051a12171c02f715d0c0a4f490aaf2fced1f23f71e66d78f22c03dbc18ab17b17827223af66213589f44181789fb20ac3ad6f1c77c0

memory/2352-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2352-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 02:02

Reported

2025-02-27 02:05

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe

"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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 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

Files

memory/2500-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 90747e0ac18a12a342ef42a5bd53e13a
SHA1 f4d72ea7fecac722d8e6e675c0921326e72b3652
SHA256 aa7e99c3f93266bd5c99baf381db538843b0be191de5f0c5ff94b195f6c95ce4
SHA512 0eb7ad8b7092f6f0338ab051a12171c02f715d0c0a4f490aaf2fced1f23f71e66d78f22c03dbc18ab17b17827223af66213589f44181789fb20ac3ad6f1c77c0

memory/2500-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1848-7-0x0000000000400000-0x000000000040E000-memory.dmp