Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-dsyx5ssybs
Target a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9
SHA256 a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9
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

a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9

Threat Level: Known bad

The file a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9 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

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-02-27 03:16

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 03:16

Reported

2025-02-27 03:19

Platform

win7-20240729-en

Max time kernel

149s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe

"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2668-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 d4a054f69ebc443912767bac39b14c24
SHA1 ff1bf142bcb30e272c50d5b4652b54bda85d8f12
SHA256 5c5cad728b7448b7ebacf9822bd986228cee43d9aa8a969a38917aebe99155b5
SHA512 7facf9f5a43d0fffde82dd7ce0a4e1f2fcfe49b9bffdba29ea35f8f6e7ff05f4dd0b71e3923f95813afa8e9cb007ef6df7b703059cf8587d08ec917d0ec32f9b

memory/2668-3-0x0000000000220000-0x000000000022E000-memory.dmp

memory/2772-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2772-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 03:16

Reported

2025-02-27 03:19

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe

"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
AU 104.46.162.227:443 tcp
US 150.171.27.10:443 tcp
US 150.171.27.10:443 tcp
US 150.171.27.10:443 tcp
US 150.171.27.10:443 tcp
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
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/3580-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 d4a054f69ebc443912767bac39b14c24
SHA1 ff1bf142bcb30e272c50d5b4652b54bda85d8f12
SHA256 5c5cad728b7448b7ebacf9822bd986228cee43d9aa8a969a38917aebe99155b5
SHA512 7facf9f5a43d0fffde82dd7ce0a4e1f2fcfe49b9bffdba29ea35f8f6e7ff05f4dd0b71e3923f95813afa8e9cb007ef6df7b703059cf8587d08ec917d0ec32f9b

memory/2876-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/3580-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2876-8-0x0000000000400000-0x000000000040E000-memory.dmp