Analysis Overview
SHA256
c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146
Threat Level: Known bad
The file c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146 was found to be: Known bad.
Malicious Activity Summary
BlihanStealer
Blihanstealer family
Executes dropped EXE
Deletes itself
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 05:12
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 05:12
Reported
2025-02-27 05:15
Platform
win7-20240903-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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2548 wrote to memory of 1656 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
| PID 2548 wrote to memory of 1656 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
| PID 2548 wrote to memory of 1656 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
| PID 2548 wrote to memory of 1656 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe
"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2548-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 0379da994f862a512efb7ec47c2ec3d2 |
| SHA1 | d727f6108266066bbe904fd2a24d56a303032e63 |
| SHA256 | 38de23b5d2bef66e114002d5a3eede6f8c6155b4871ce11f5d9f5787aa251b99 |
| SHA512 | 01060d9c140316b9601eb10cd31d05ecb7dfaa91f84687c10ba6861382bc3c19ad4a7ce35318bef6f6ea96453c8b6407729906ef80fb888f166911249a0c9d75 |
memory/2548-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1656-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1656-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 05:12
Reported
2025-02-27 05:15
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
151s
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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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 2728 wrote to memory of 796 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
| PID 2728 wrote to memory of 796 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
| PID 2728 wrote to memory of 796 | N/A | C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.exe
"C:\Users\Admin\AppData\Local\Temp\c9b9b5d5eb72f81245ca5b8b0f8d5a876bbc260b82ad813d2084d975761de146.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/2728-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 0379da994f862a512efb7ec47c2ec3d2 |
| SHA1 | d727f6108266066bbe904fd2a24d56a303032e63 |
| SHA256 | 38de23b5d2bef66e114002d5a3eede6f8c6155b4871ce11f5d9f5787aa251b99 |
| SHA512 | 01060d9c140316b9601eb10cd31d05ecb7dfaa91f84687c10ba6861382bc3c19ad4a7ce35318bef6f6ea96453c8b6407729906ef80fb888f166911249a0c9d75 |
memory/2728-6-0x0000000000400000-0x000000000040E000-memory.dmp
memory/796-7-0x0000000000400000-0x000000000040E000-memory.dmp