Analysis Overview
SHA256
26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae
Threat Level: Known bad
The file 26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae 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 21:02
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2025-02-26 21:02
Reported
2025-02-26 21:05
Platform
win10v2004-20250217-en
Max time kernel
149s
Max time network
146s
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\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.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\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.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 3216 wrote to memory of 752 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
| PID 3216 wrote to memory of 752 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
| PID 3216 wrote to memory of 752 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe
"C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.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/3216-0-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 9656fb6f2c69910b61e1274db2db6619 |
| SHA1 | b227cef73dbf2caf5be958d0babedbed36203bb7 |
| SHA256 | 6dd80b80a4b64a7f702c7d8e5a3eb8288a18dc90f9701b97d4041ba0c4d7b23c |
| SHA512 | 233d3818e4291805890c798f33153d4227ef9a8f6040448eccda60bb3b540a54b533a25330c8cd44b0a7e48f90c14a0ab2d7453d84b00ed4b41aeca3a21e5c99 |
memory/3216-4-0x0000000000400000-0x000000000040E000-memory.dmp
memory/752-6-0x0000000000400000-0x000000000040E000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2025-02-26 21:02
Reported
2025-02-26 21:05
Platform
win7-20241010-en
Max time kernel
149s
Max time network
125s
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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\microsofthelp.exe | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.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\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2904 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
| PID 2904 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
| PID 2904 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
| PID 2904 wrote to memory of 2456 | N/A | C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe | C:\Windows\microsofthelp.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe
"C:\Users\Admin\AppData\Local\Temp\26a9e26286604b01a798573f56a9d50d693b9db54bd509c7963721ec120ebbae.exe"
C:\Windows\microsofthelp.exe
"C:\Windows\microsofthelp.exe"
Network
Files
memory/2904-0-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2904-7-0x0000000000400000-0x000000000040E000-memory.dmp
C:\Windows\microsofthelp.exe
| MD5 | 9656fb6f2c69910b61e1274db2db6619 |
| SHA1 | b227cef73dbf2caf5be958d0babedbed36203bb7 |
| SHA256 | 6dd80b80a4b64a7f702c7d8e5a3eb8288a18dc90f9701b97d4041ba0c4d7b23c |
| SHA512 | 233d3818e4291805890c798f33153d4227ef9a8f6040448eccda60bb3b540a54b533a25330c8cd44b0a7e48f90c14a0ab2d7453d84b00ed4b41aeca3a21e5c99 |
memory/2456-9-0x0000000000400000-0x000000000040E000-memory.dmp
memory/2456-11-0x0000000000400000-0x000000000040E000-memory.dmp