Analysis Overview
SHA256
c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78
Threat Level: Known bad
The file c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78 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
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 04:47
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 04:47
Reported
2025-02-27 04:50
Platform
win7-20240903-en
Max time kernel
149s
Max time network
122s
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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.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\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.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\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2108 wrote to memory of 1688 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
| PID 2108 wrote to memory of 1688 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
| PID 2108 wrote to memory of 1688 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
| PID 2108 wrote to memory of 1688 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe
"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2108-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2108-7-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | ff35d701f80bc242affe27cba2cb5880 |
| SHA1 | 56a779e89adc2615219eaa1fd9d55ceddf40b559 |
| SHA256 | 12557ccf87c1a282c76fbc1f21dbf1971cbdfc58c91d24f9fdb487f60f54b2e9 |
| SHA512 | 58fbe599a4ecd333a7595e2b1daace6530301d37313a3d2e82823527baaa8ea95a397f9a17cb91d7123f45c70c7049f5e6ead0bbeeb92fb22a0bf9cbe25557e6 |
memory/1688-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1688-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 04:47
Reported
2025-02-27 04:50
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
141s
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\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.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\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.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 840 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
| PID 840 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
| PID 840 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.exe
"C:\Users\Admin\AppData\Local\Temp\c2231d2f2409d68cff00fd4d94a135e6d93ed39d00fb301ae003781cf1f12f78.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 | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| 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 | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
Files
memory/840-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | ff35d701f80bc242affe27cba2cb5880 |
| SHA1 | 56a779e89adc2615219eaa1fd9d55ceddf40b559 |
| SHA256 | 12557ccf87c1a282c76fbc1f21dbf1971cbdfc58c91d24f9fdb487f60f54b2e9 |
| SHA512 | 58fbe599a4ecd333a7595e2b1daace6530301d37313a3d2e82823527baaa8ea95a397f9a17cb91d7123f45c70c7049f5e6ead0bbeeb92fb22a0bf9cbe25557e6 |
memory/840-5-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2564-7-0x0000000000400000-0x000000000040E000-memory.dmp