Analysis Overview
SHA256
14d4d6df33e96af2a1d5ef8f8e7f6f1b914b0342b219c75f812848f52bc27628
Threat Level: Known bad
The file MEmpEng.exe was found to be: Known bad.
Malicious Activity Summary
Formbook
Formbook payload
Deletes itself
Suspicious use of SetThreadContext
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of UnmapMainImage
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Gathers network information
Modifies registry class
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-29 16:48
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-29 16:48
Reported
2024-08-29 16:51
Platform
win10v2004-20240802-en
Max time kernel
149s
Max time network
135s
Command Line
Signatures
Formbook
Formbook 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 |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3064 set thread context of 4240 | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe |
| PID 4240 set thread context of 3552 | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | C:\Windows\Explorer.EXE |
| PID 60 set thread context of 3552 | N/A | C:\Windows\SysWOW64\raserver.exe | C:\Windows\Explorer.EXE |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\raserver.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ | C:\Windows\Explorer.EXE | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ | C:\Windows\Explorer.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\raserver.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\raserver.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\raserver.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\Explorer.EXE | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\Explorer.EXE | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\Explorer.EXE | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\Explorer.EXE | N/A |
Suspicious use of UnmapMainImage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Explorer.EXE | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 136.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 65.139.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.ffg7.autos | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.ianju-ljef097.vip | udp |
| US | 8.8.8.8:53 | www.t83t56zshegbbo.sbs | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| 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 |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | www.5571.club | udp |
| US | 8.8.8.8:53 | www.yai54.top | udp |
Files
memory/3064-0-0x000000007466E000-0x000000007466F000-memory.dmp
memory/3064-1-0x0000000000640000-0x00000000006DC000-memory.dmp
memory/3064-2-0x0000000005750000-0x0000000005CF4000-memory.dmp
memory/3064-3-0x00000000050B0000-0x0000000005142000-memory.dmp
memory/3064-4-0x0000000074660000-0x0000000074E10000-memory.dmp
memory/3064-5-0x00000000052F0000-0x00000000052FA000-memory.dmp
memory/3064-6-0x0000000007E10000-0x0000000007E28000-memory.dmp
memory/3064-7-0x000000007466E000-0x000000007466F000-memory.dmp
memory/3064-8-0x0000000074660000-0x0000000074E10000-memory.dmp
memory/3064-9-0x0000000006400000-0x0000000006476000-memory.dmp
memory/3064-10-0x0000000006660000-0x00000000066FC000-memory.dmp
memory/4240-11-0x0000000000400000-0x000000000042F000-memory.dmp
memory/3064-13-0x0000000074660000-0x0000000074E10000-memory.dmp
memory/4240-14-0x0000000000F10000-0x000000000125A000-memory.dmp
memory/4240-17-0x0000000000ED0000-0x0000000000EE5000-memory.dmp
memory/4240-16-0x0000000000400000-0x000000000042F000-memory.dmp
memory/3552-18-0x0000000007F70000-0x0000000008033000-memory.dmp
memory/60-19-0x00000000007E0000-0x00000000007FF000-memory.dmp
memory/60-21-0x00000000007E0000-0x00000000007FF000-memory.dmp
memory/60-22-0x0000000001000000-0x000000000102F000-memory.dmp
memory/3552-23-0x0000000007F70000-0x0000000008033000-memory.dmp
memory/3552-27-0x0000000007860000-0x00000000078F8000-memory.dmp
memory/3552-28-0x0000000007860000-0x00000000078F8000-memory.dmp
memory/3552-30-0x0000000007860000-0x00000000078F8000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-29 16:48
Reported
2024-08-29 16:51
Platform
win7-20240708-en
Max time kernel
147s
Max time network
123s
Command Line
Signatures
Formbook
Formbook 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 |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2500 set thread context of 2888 | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe |
| PID 2888 set thread context of 1196 | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | C:\Windows\Explorer.EXE |
| PID 2800 set thread context of 1196 | N/A | C:\Windows\SysWOW64\NETSTAT.EXE | C:\Windows\Explorer.EXE |
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\MEmpEng.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\NETSTAT.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
Gathers network information
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\NETSTAT.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSTAT.EXE | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSTAT.EXE | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\NETSTAT.EXE | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
"C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
C:\Windows\SysWOW64\NETSTAT.EXE
"C:\Windows\SysWOW64\NETSTAT.EXE"
C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
Network
Files
memory/2500-0-0x000000007441E000-0x000000007441F000-memory.dmp
memory/2500-1-0x00000000002B0000-0x000000000034C000-memory.dmp
memory/2500-2-0x0000000074410000-0x0000000074AFE000-memory.dmp
memory/2500-3-0x00000000008C0000-0x00000000008D8000-memory.dmp
memory/2500-4-0x000000007441E000-0x000000007441F000-memory.dmp
memory/2500-5-0x0000000074410000-0x0000000074AFE000-memory.dmp
memory/2500-6-0x0000000005050000-0x00000000050C6000-memory.dmp
memory/2888-7-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2888-9-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2888-13-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2888-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2500-14-0x0000000074410000-0x0000000074AFE000-memory.dmp
memory/2888-15-0x00000000009E0000-0x0000000000CE3000-memory.dmp
memory/1196-17-0x0000000003B50000-0x0000000003C50000-memory.dmp
memory/2888-19-0x0000000000280000-0x0000000000295000-memory.dmp
memory/1196-20-0x0000000005030000-0x00000000051A8000-memory.dmp
memory/2888-18-0x0000000000400000-0x000000000042F000-memory.dmp
memory/2800-21-0x00000000004F0000-0x00000000004F9000-memory.dmp
memory/2800-22-0x00000000004F0000-0x00000000004F9000-memory.dmp
memory/2800-23-0x0000000000130000-0x000000000015F000-memory.dmp
memory/1196-24-0x0000000005030000-0x00000000051A8000-memory.dmp