Malware Analysis Report

2025-06-15 19:58

Sample ID 250227-cqw54asjv5
Target 917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc
SHA256 917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc
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

917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc

Threat Level: Known bad

The file 917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc 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

2025-02-27 02:17

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-02-27 02:17

Reported

2025-02-27 02:20

Platform

win7-20250207-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe

"C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2748-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2748-3-0x00000000001B0000-0x00000000001BE000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0101df50ee03a7b1fef8c18e6e3ab0e6
SHA1 e0d6431566193b95adb323fd655dd8ba6717d287
SHA256 a92b21c0fb87ccb3bbe09df082f383705b90f16189b4448e502571b991201faa
SHA512 8887d5efe0fa38a718825a3a16f6bf2d59ca09609319a09cfffa528d929d1d9d156abe64ad27e6500433e9bed048b42d65241f9e1f88e49f49f7395ca9e707d4

memory/2840-9-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2840-11-0x0000000000400000-0x000000000040E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-02-27 02:17

Reported

2025-02-27 02:20

Platform

win10v2004-20250217-en

Max time kernel

149s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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-1-5-21-2278412438-3475196406-3686434223-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.exe

"C:\Users\Admin\AppData\Local\Temp\917f931b9d3581d80fbe96c0febb8c66b6e2b8ba4dfcc472ff5a5f85e122f0cc.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 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

Files

memory/2300-0-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2044-7-0x0000000000400000-0x000000000040E000-memory.dmp

memory/2300-6-0x0000000000400000-0x000000000040E000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 0101df50ee03a7b1fef8c18e6e3ab0e6
SHA1 e0d6431566193b95adb323fd655dd8ba6717d287
SHA256 a92b21c0fb87ccb3bbe09df082f383705b90f16189b4448e502571b991201faa
SHA512 8887d5efe0fa38a718825a3a16f6bf2d59ca09609319a09cfffa528d929d1d9d156abe64ad27e6500433e9bed048b42d65241f9e1f88e49f49f7395ca9e707d4

memory/2044-8-0x0000000000400000-0x000000000040E000-memory.dmp