Malware Analysis Report

2025-06-15 19:58

Sample ID 250226-zvy7kstmw2
Target 287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7
SHA256 287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7
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

287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7

Threat Level: Known bad

The file 287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7 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

2025-02-26 21:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-26 21:02

Reported

2025-02-26 21:05

Platform

win7-20240903-en

Max time kernel

149s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe

"C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2288-3-0x00000000001B0000-0x00000000001BE000-memory.dmp

memory/2288-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 a5e76af347a273353795f307ad6c37b4
SHA1 dfea46bb2cac2a5ef2c887d71aa43ecb15b6cb55
SHA256 9148b042fe1796ac82eb639e5aee5c730a366084a60f54ca6fcc7e46abfab4f8
SHA512 7f5c13656bf41ffe4ee9d98684b7f7c0f2585f0ccbcb37ffd22e452a8c07ad2e5573ec82867c7b18f5c69ca6310db4c0381d00739c73f1edb798bb0b29a21a85

memory/2156-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2156-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-26 21:02

Reported

2025-02-26 21:05

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

129s

Command Line

"C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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-1-5-21-1479699283-3000499823-2337359760-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.exe

"C:\Users\Admin\AppData\Local\Temp\287a09036e3e773ae9fe9721a1650be793c34b4804ee4636c05c1795e890a6a7.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/960-0-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 a5e76af347a273353795f307ad6c37b4
SHA1 dfea46bb2cac2a5ef2c887d71aa43ecb15b6cb55
SHA256 9148b042fe1796ac82eb639e5aee5c730a366084a60f54ca6fcc7e46abfab4f8
SHA512 7f5c13656bf41ffe4ee9d98684b7f7c0f2585f0ccbcb37ffd22e452a8c07ad2e5573ec82867c7b18f5c69ca6310db4c0381d00739c73f1edb798bb0b29a21a85

memory/1928-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/960-6-0x0000000000400000-0x000000000040E000-memory.dmp

memory/1928-8-0x0000000000400000-0x000000000040E000-memory.dmp