Analysis Overview
SHA256
a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31
Threat Level: Known bad
The file a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31 was found to be: Known bad.
Malicious Activity Summary
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
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-27 03:18
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 03:18
Reported
2025-02-27 03:20
Platform
win7-20240903-en
Max time kernel
149s
Max time network
121s
Command Line
Signatures
BlihanStealer
Blihanstealer family
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
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
| File created | C:\Windows\HidePlugin.dll | C:\Windows\microsofthelp.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2696 wrote to memory of 2872 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
| PID 2696 wrote to memory of 2872 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
| PID 2696 wrote to memory of 2872 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
| PID 2696 wrote to memory of 2872 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe
"C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2696-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | aefecbdc540c7e0bf5dcead2ea8fedca |
| SHA1 | 0a26e0b719c26ae876825e51321182a24806cf71 |
| SHA256 | 84bc10b95862e4629328431b24bab4afc88d408d61ed296f03045074eb1a33e6 |
| SHA512 | 9c7c77004a0f32173b00934ed2ecd9ef25a304c02030e7855bdb232cfc17bc502b4370939f9e690c3d41f67727f91be9b1915bb7c42f94456dd7fa1118284cac |
memory/2696-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2872-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2872-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 03:18
Reported
2025-02-27 03:20
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
150s
Command Line
Signatures
BlihanStealer
Blihanstealer family
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
| 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\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
| File created | C:\Windows\HidePlugin.dll | C:\Windows\microsofthelp.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\microsofthelp.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2260 wrote to memory of 3644 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
| PID 2260 wrote to memory of 3644 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
| PID 2260 wrote to memory of 3644 | N/A | C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.exe
"C:\Users\Admin\AppData\Local\Temp\a513f92aa2a10462508203646892b917be8673033d778a98ea3d63dcf793cb31.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 | 150.171.28.10:443 | 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 |
| US | 8.8.8.8:53 | udp |
Files
memory/2260-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | aefecbdc540c7e0bf5dcead2ea8fedca |
| SHA1 | 0a26e0b719c26ae876825e51321182a24806cf71 |
| SHA256 | 84bc10b95862e4629328431b24bab4afc88d408d61ed296f03045074eb1a33e6 |
| SHA512 | 9c7c77004a0f32173b00934ed2ecd9ef25a304c02030e7855bdb232cfc17bc502b4370939f9e690c3d41f67727f91be9b1915bb7c42f94456dd7fa1118284cac |
memory/2260-5-0x0000000000400000-0x000000000040E000-memory.dmp
memory/3644-7-0x0000000000400000-0x000000000040E000-memory.dmp