Analysis Overview
SHA256
a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9
Threat Level: Known bad
The file a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9 was found to be: Known bad.
Malicious Activity Summary
Blihanstealer family
BlihanStealer
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 03:16
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 03:16
Reported
2025-02-27 03:19
Platform
win7-20240729-en
Max time kernel
149s
Max time network
16s
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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2668 wrote to memory of 2772 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
| PID 2668 wrote to memory of 2772 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
| PID 2668 wrote to memory of 2772 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
| PID 2668 wrote to memory of 2772 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe
"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2668-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | d4a054f69ebc443912767bac39b14c24 |
| SHA1 | ff1bf142bcb30e272c50d5b4652b54bda85d8f12 |
| SHA256 | 5c5cad728b7448b7ebacf9822bd986228cee43d9aa8a969a38917aebe99155b5 |
| SHA512 | 7facf9f5a43d0fffde82dd7ce0a4e1f2fcfe49b9bffdba29ea35f8f6e7ff05f4dd0b71e3923f95813afa8e9cb007ef6df7b703059cf8587d08ec917d0ec32f9b |
memory/2668-3-0x0000000000220000-0x000000000022E000-memory.dmp
memory/2772-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2772-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 03:16
Reported
2025-02-27 03:19
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
139s
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-1-5-21-925314154-1797147466-1467878628-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\HidePlugin.dll | C:\Windows\microsofthelp.exe | N/A |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.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 3580 wrote to memory of 2876 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
| PID 3580 wrote to memory of 2876 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
| PID 3580 wrote to memory of 2876 | N/A | C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe
"C:\Users\Admin\AppData\Local\Temp\a4da03fd32a94035caf5b4b2a3f5b122f318f6d8636b3e902832be1fc773ffb9.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
| Country | Destination | Domain | Proto |
| AU | 104.46.162.227:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tcp | |
| US | 150.171.27.10:443 | tse1.mm.bing.net | 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 | 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 |
Files
memory/3580-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | d4a054f69ebc443912767bac39b14c24 |
| SHA1 | ff1bf142bcb30e272c50d5b4652b54bda85d8f12 |
| SHA256 | 5c5cad728b7448b7ebacf9822bd986228cee43d9aa8a969a38917aebe99155b5 |
| SHA512 | 7facf9f5a43d0fffde82dd7ce0a4e1f2fcfe49b9bffdba29ea35f8f6e7ff05f4dd0b71e3923f95813afa8e9cb007ef6df7b703059cf8587d08ec917d0ec32f9b |
memory/2876-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/3580-6-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2876-8-0x0000000000400000-0x000000000040E000-memory.dmp