Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-epwjaat1cw
Target b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf
SHA256 b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf
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

b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf

Threat Level: Known bad

The file b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf was found to be: Known bad.

Malicious Activity Summary

blihanstealer discovery persistence stealer trojan

Blihanstealer family

BlihanStealer

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 04:07

Signatures

Blihanstealer family

blihanstealer

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 04:07

Reported

2025-02-27 04:10

Platform

win7-20241023-en

Max time kernel

149s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.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\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe

"C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2520-0-0x0000000000400000-0x000000000040F000-memory.dmp

memory/2520-6-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 8b37ebbdbf57a826f2f35e399355788b
SHA1 3aa3a4479ec9534b9d504a9afdbbd8b1d2f53b80
SHA256 ba0ec3da0a494a487f56f7c07d2e292356e05db026b06e20d0e3ba07ae460a2b
SHA512 ec5ef9e4d1b0070afc1f4fa82c436d139f34114af3cf434fa0985377454629e8da611aff74a3ca98472e42e5e6a2b1529d5ce5cf0fa2d8be38a4ddc0efdd2d1a

memory/2516-9-0x0000000000400000-0x000000000040F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 04:07

Reported

2025-02-27 04:10

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.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\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.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\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.exe

"C:\Users\Admin\AppData\Local\Temp\b50033ffc563ae8e149574b75a726aaaa970cfb168fb538ad6df098e3f87cedf.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 150.171.28.10:443 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/3080-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 8b37ebbdbf57a826f2f35e399355788b
SHA1 3aa3a4479ec9534b9d504a9afdbbd8b1d2f53b80
SHA256 ba0ec3da0a494a487f56f7c07d2e292356e05db026b06e20d0e3ba07ae460a2b
SHA512 ec5ef9e4d1b0070afc1f4fa82c436d139f34114af3cf434fa0985377454629e8da611aff74a3ca98472e42e5e6a2b1529d5ce5cf0fa2d8be38a4ddc0efdd2d1a

memory/3080-4-0x0000000000400000-0x000000000040F000-memory.dmp

memory/3396-6-0x0000000000400000-0x000000000040F000-memory.dmp