Analysis Overview
SHA256
b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77
Threat Level: Known bad
The file b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77 was found to be: Known bad.
Malicious Activity Summary
Banload
Blackmoon, KrBanker
Detect Blackmoon payload
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Checks BIOS information in registry
UPX packed file
System Location Discovery: System Language Discovery
Program crash
Unsigned PE
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-09-26 14:30
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-09-26 14:30
Reported
2024-09-26 14:33
Platform
win10v2004-20240802-en
Max time kernel
94s
Max time network
122s
Command Line
Signatures
Banload
Blackmoon, KrBanker
Detect Blackmoon payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Windows\SysWOW64\rundll32.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Windows\SysWOW64\rundll32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ = "Microsoft Windows Remote Shell Host" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\AppId = "{3e5ca495-8d6a-4d1f-ad99-177b426c8b8e}" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32\ = "%systemroot%\\SysWow64\\WinrsHost.exe" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\LocalServer32\ServerExecutable = "%systemroot%\\SysWow64\\WinrsHost.exe" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048} | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: 33 | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2996 wrote to memory of 2824 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2996 wrote to memory of 2824 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 2996 wrote to memory of 2824 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2824 -ip 2824
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2824 -s 1116
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 75.117.19.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.209.201.84.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
Files
memory/2824-0-0x0000000002B70000-0x0000000002D70000-memory.dmp
memory/2824-7-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2824-9-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2824-10-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2824-11-0x0000000002B70000-0x0000000002D70000-memory.dmp
memory/2824-12-0x0000000002AB0000-0x0000000002ABB000-memory.dmp
memory/2824-13-0x0000000002AB0000-0x0000000002ABB000-memory.dmp
memory/2824-14-0x0000000002B70000-0x0000000002D70000-memory.dmp
memory/2824-15-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2824-16-0x0000000002AB0000-0x0000000002ABB000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-09-26 14:30
Reported
2024-09-26 14:33
Platform
win7-20240704-en
Max time kernel
141s
Max time network
120s
Command Line
Signatures
Banload
Blackmoon, KrBanker
Detect Blackmoon payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Identifies VirtualBox via ACPI registry values (likely anti-VM)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ | C:\Windows\SysWOW64\rundll32.exe | N/A |
Checks BIOS information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate | C:\Windows\SysWOW64\rundll32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32.exe |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ProgID\ = "SAPI.SpLexicon.1" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TypeLib | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\Version | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\VersionIndependentProgID\ = "SAPI.SpLexicon" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ = "SpLexicon Class" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32 | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32\ThreadingModel = "Both" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\ProgID | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\TypeLib\ = "{C866CA3A-32F7-11D2-9602-00C04F8EE628}" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\Version\ = "5.4" | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\VersionIndependentProgID | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048} | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7C231048-7C23-1048-7C23-10487C231048}\InprocServer32\ = "%SystemRoot%\\SysWow64\\Speech\\Common\\sapi.dll" | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: 33 | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b141ab85d517a27d05b3062622ee40da3de8af75c699e44e3f34c54a9257ae77.dll,#1
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 668
Network
Files
memory/2764-0-0x0000000002710000-0x0000000002910000-memory.dmp
memory/2764-7-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2764-10-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2764-9-0x0000000010000000-0x0000000010379000-memory.dmp
memory/2764-11-0x0000000002710000-0x0000000002910000-memory.dmp
memory/2764-13-0x0000000000270000-0x000000000027B000-memory.dmp
memory/2764-12-0x0000000000270000-0x000000000027B000-memory.dmp
memory/2764-14-0x0000000010000000-0x0000000010379000-memory.dmp