Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-g57btszky2
Target dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3
SHA256 dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3
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

dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3

Threat Level: Known bad

The file dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3 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 06:24

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 06:24

Reported

2025-02-27 06:26

Platform

win7-20241023-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe

"C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/1980-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 60caf90b4724b32ff16f7b3bdacae450
SHA1 823bf453703779aa68f71b7e0f7378c76925839f
SHA256 6970419956bba3c5686eb91dda517548a92de217b00ca06e90f4eeb44b103298
SHA512 ff4126004a2b0dd1328b984f12133ad811f61c8f909cb04c4b15389247666f880d1104a685bdabc10d80eaf070412793a5b48785918913aeb50cc01ff00be2fc

memory/1980-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2600-10-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 06:24

Reported

2025-02-27 06:26

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.exe

"C:\Users\Admin\AppData\Local\Temp\dd5e5ff861d99c02aa01beba7ec09da0bf938ce9244bfd94c0239639d99971e3.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 150.171.27.10:443 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

Files

memory/3036-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 60caf90b4724b32ff16f7b3bdacae450
SHA1 823bf453703779aa68f71b7e0f7378c76925839f
SHA256 6970419956bba3c5686eb91dda517548a92de217b00ca06e90f4eeb44b103298
SHA512 ff4126004a2b0dd1328b984f12133ad811f61c8f909cb04c4b15389247666f880d1104a685bdabc10d80eaf070412793a5b48785918913aeb50cc01ff00be2fc

memory/3036-4-0x0000000000400000-0x000000000040E000-memory.dmp

memory/4664-6-0x0000000000400000-0x000000000040E000-memory.dmp