Analysis Overview
SHA256
8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705
Threat Level: Known bad
The file 8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705 was found to be: Known bad.
Malicious Activity Summary
Blihanstealer family
BlihanStealer
Executes dropped EXE
Deletes itself
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
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2025-02-27 01:56
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 01:56
Reported
2025-02-27 01:58
Platform
win7-20240729-en
Max time kernel
149s
Max time network
119s
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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3052 wrote to memory of 2648 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
| PID 3052 wrote to memory of 2648 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
| PID 3052 wrote to memory of 2648 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
| PID 3052 wrote to memory of 2648 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe
"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/3052-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 90747e0ac18a12a342ef42a5bd53e13a |
| SHA1 | f4d72ea7fecac722d8e6e675c0921326e72b3652 |
| SHA256 | aa7e99c3f93266bd5c99baf381db538843b0be191de5f0c5ff94b195f6c95ce4 |
| SHA512 | 0eb7ad8b7092f6f0338ab051a12171c02f715d0c0a4f490aaf2fced1f23f71e66d78f22c03dbc18ab17b17827223af66213589f44181789fb20ac3ad6f1c77c0 |
memory/3052-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2648-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2648-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 01:56
Reported
2025-02-27 01:58
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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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 4240 wrote to memory of 5064 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
| PID 4240 wrote to memory of 5064 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
| PID 4240 wrote to memory of 5064 | N/A | C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.exe
"C:\Users\Admin\AppData\Local\Temp\8a2c8b93508214fd966156de51e052991d194f76c0897520b174ab4ca2eb2705.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 | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
Files
memory/4240-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 90747e0ac18a12a342ef42a5bd53e13a |
| SHA1 | f4d72ea7fecac722d8e6e675c0921326e72b3652 |
| SHA256 | aa7e99c3f93266bd5c99baf381db538843b0be191de5f0c5ff94b195f6c95ce4 |
| SHA512 | 0eb7ad8b7092f6f0338ab051a12171c02f715d0c0a4f490aaf2fced1f23f71e66d78f22c03dbc18ab17b17827223af66213589f44181789fb20ac3ad6f1c77c0 |
memory/4240-6-0x0000000000400000-0x000000000040E000-memory.dmp
memory/5064-7-0x0000000000400000-0x000000000040E000-memory.dmp