Analysis Overview
SHA256
67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b
Threat Level: Known bad
The file 67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b 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 00:10
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-27 00:10
Reported
2025-02-27 00:12
Platform
win7-20240903-en
Max time kernel
149s
Max time network
120s
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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.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\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 796 wrote to memory of 2004 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
| PID 796 wrote to memory of 2004 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
| PID 796 wrote to memory of 2004 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
| PID 796 wrote to memory of 2004 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe
"C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/796-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/796-7-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 250007b54b5e38b582f226d615067e78 |
| SHA1 | 0da643f90277a481bd90c39db0453438e5aa2ab8 |
| SHA256 | 76b70dea56f71e6135c3e2fae512739cb20dd13edc9bdcdfe0ec05b4fb05e50a |
| SHA512 | dc7f9f95c348b15adec9db60878aa53ea8151536d1afa83748eaceda5b826ad6a040b43885d9920e0e139be7743d1840ae52ce9da43597c0dbed08c3d3709f98 |
memory/2004-10-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-27 00:10
Reported
2025-02-27 00:12
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-1-5-21-2278412438-3475196406-3686434223-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.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\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.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 3392 wrote to memory of 4416 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
| PID 3392 wrote to memory of 4416 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
| PID 3392 wrote to memory of 4416 | N/A | C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.exe
"C:\Users\Admin\AppData\Local\Temp\67dc9a8421c6171f182b6770c11ff140181caba58effbd61386e83330800218b.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 | 150.171.27.10:443 | 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/3392-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 250007b54b5e38b582f226d615067e78 |
| SHA1 | 0da643f90277a481bd90c39db0453438e5aa2ab8 |
| SHA256 | 76b70dea56f71e6135c3e2fae512739cb20dd13edc9bdcdfe0ec05b4fb05e50a |
| SHA512 | dc7f9f95c348b15adec9db60878aa53ea8151536d1afa83748eaceda5b826ad6a040b43885d9920e0e139be7743d1840ae52ce9da43597c0dbed08c3d3709f98 |
memory/3392-6-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4416-7-0x0000000000400000-0x000000000040E000-memory.dmp