Analysis Overview
SHA256
1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e
Threat Level: Known bad
The file 1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e was found to be: Known bad.
Malicious Activity Summary
BlihanStealer
Blihanstealer family
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
2025-02-26 20:29
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-26 20:29
Reported
2025-02-26 20:32
Platform
win7-20240903-en
Max time kernel
149s
Max time network
117s
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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.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\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.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\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2460 wrote to memory of 1288 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
| PID 2460 wrote to memory of 1288 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
| PID 2460 wrote to memory of 1288 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
| PID 2460 wrote to memory of 1288 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe
"C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2460-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2460-8-0x0000000000220000-0x000000000022E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | a059b05b82d736bdfa10d4ab7311152b |
| SHA1 | 85eb5cb44dc9de713d335a0939550bb741246fa6 |
| SHA256 | 1b2e54b0a1b611f1d72de5ee2feaaa63aeab48f3046d8f573cc1407300babf35 |
| SHA512 | f17024805dfa9fd7ab855ec753a7f59d75ec06723fb8ecd4286cf52802a146e68ebc3d9e1a6eebdb7b463544baed1b4c5d06d65be7338bda9b14d37733e24ed4 |
memory/2460-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1288-11-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-26 20:29
Reported
2025-02-26 20:32
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
142s
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-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.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\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.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 4688 wrote to memory of 1108 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
| PID 4688 wrote to memory of 1108 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
| PID 4688 wrote to memory of 1108 | N/A | C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.exe
"C:\Users\Admin\AppData\Local\Temp\1b48897d2c2666441d7a9bc569ef1220e5821beb0668e4f559fe2082b1c36c5e.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 | 150.171.27.10:443 | 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/4688-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | a059b05b82d736bdfa10d4ab7311152b |
| SHA1 | 85eb5cb44dc9de713d335a0939550bb741246fa6 |
| SHA256 | 1b2e54b0a1b611f1d72de5ee2feaaa63aeab48f3046d8f573cc1407300babf35 |
| SHA512 | f17024805dfa9fd7ab855ec753a7f59d75ec06723fb8ecd4286cf52802a146e68ebc3d9e1a6eebdb7b463544baed1b4c5d06d65be7338bda9b14d37733e24ed4 |
memory/1108-6-0x0000000000400000-0x000000000040E000-memory.dmp
memory/4688-7-0x0000000000400000-0x000000000040E000-memory.dmp
memory/1108-8-0x0000000000400000-0x000000000040E000-memory.dmp