Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-fyvh1swza1
Target cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772
SHA256 cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772
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

cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772

Threat Level: Known bad

The file cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772 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 05:17

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 05:17

Reported

2025-02-27 05:19

Platform

win7-20240903-en

Max time kernel

149s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe

"C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2628-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2628-3-0x0000000000220000-0x000000000022E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 c5e85fdbf9f464950f4348c7c234d26c
SHA1 3d5a546ae8b365f00450fc357b896f783104e5ce
SHA256 82f62b21e8c830c93831d1c0043ef36cf423dc8d109743b0d7ea14ba2448f9ec
SHA512 e3e9acf73d88deecba0276688e73343e28415965e337087799e6fc93ec9e45bc30fda86b7ed36b51734693e549e13f5317a95eb4220b335189b63e9e334f6ae4

memory/2628-8-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2964-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 05:17

Reported

2025-02-27 05:19

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.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\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe

"C:\Users\Admin\AppData\Local\Temp\cad5b299da8187a0f67d73489580447ef54da6993384d1789a15241be0f7f772.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 150.171.28.10:443 tcp
US 150.171.28.10:443 tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
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/756-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/756-6-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 c5e85fdbf9f464950f4348c7c234d26c
SHA1 3d5a546ae8b365f00450fc357b896f783104e5ce
SHA256 82f62b21e8c830c93831d1c0043ef36cf423dc8d109743b0d7ea14ba2448f9ec
SHA512 e3e9acf73d88deecba0276688e73343e28415965e337087799e6fc93ec9e45bc30fda86b7ed36b51734693e549e13f5317a95eb4220b335189b63e9e334f6ae4

memory/4688-7-0x0000000000400000-0x000000000040E000-memory.dmp