Analysis Overview
SHA256
de06ee1f57bc4475cf0a9a7352b0ca51b31bee6aee54429982a6ab7bdf8795e9
Threat Level: Known bad
The file remcos_a.exe was found to be: Known bad.
Malicious Activity Summary
Remcos family
Remcos
UAC bypass
Suspicious use of SetThreadContext
System Location Discovery: System Language Discovery
Unsigned PE
Suspicious use of SetWindowsHookEx
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-12 05:56
Signatures
Remcos family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-12 05:56
Reported
2024-08-12 05:58
Platform
win7-20240708-en
Max time kernel
72s
Max time network
69s
Command Line
Signatures
Remcos
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2692 set thread context of 1664 | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | \??\c:\program files (x86)\internet explorer\iexplore.exe |
| PID 1664 set thread context of 1164 | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | C:\Windows\SysWOW64\svchost.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\remcos_a.exe | N/A |
| 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:\program files (x86)\internet explorer\iexplore.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\reg.exe | N/A |
| 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:\Windows\SysWOW64\reg.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
\??\c:\program files (x86)\internet explorer\iexplore.exe
"c:\program files (x86)\internet explorer\iexplore.exe"
C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.1.252:2404 | tcp | |
| N/A | 192.168.1.252:2404 | tcp | |
| N/A | 192.168.1.252:2404 | tcp | |
| N/A | 192.168.1.252:2404 | tcp |
Files
memory/1664-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1664-2-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-4-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-8-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-12-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-9-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-5-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1164-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1164-18-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-23-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-24-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-25-0x0000000000080000-0x0000000000102000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 816fcf1d5c3a96e059728032a2547e54 |
| SHA1 | 307b21319e23f2541b59a4fde9d56b5fa2140fb9 |
| SHA256 | 404bf228af5660d34eb8b9ad14f74fe35c82c3fd38bce27b22119ec4d4b11303 |
| SHA512 | 318e9ee8bdbf245d5fcc8c7aaea677d66442f85b2d5a21ae2fd96b589f32c61757c85c3db24e45a04d06563c2164f4d9b02ca73a469fbebe81aa5053463efafa |
memory/1664-30-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-31-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-38-0x0000000000080000-0x0000000000102000-memory.dmp
memory/1664-39-0x0000000000080000-0x0000000000102000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-12 05:56
Reported
2024-08-12 05:59
Platform
win10v2004-20240802-en
Max time kernel
148s
Max time network
150s
Command Line
Signatures
Remcos
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3680 set thread context of 400 | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | \??\c:\program files (x86)\internet explorer\iexplore.exe |
| PID 400 set thread context of 5032 | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | C:\Windows\SysWOW64\svchost.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\remcos_a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | \??\c:\program files (x86)\internet explorer\iexplore.exe | N/A |
| 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:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\reg.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\reg.exe | N/A |
Modifies registry key
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\reg.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
\??\c:\program files (x86)\internet explorer\iexplore.exe
"c:\program files (x86)\internet explorer\iexplore.exe"
C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\svchost.exe
svchost.exe
C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.1.252:2404 | tcp | |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| N/A | 192.168.1.252:2404 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| N/A | 192.168.1.252:2404 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 192.168.1.252:2404 | tcp | |
| N/A | 192.168.1.252:2404 | tcp | |
| 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 |
| N/A | 192.168.1.252:2404 | tcp | |
| N/A | 192.168.1.252:2404 | tcp | |
| US | 8.8.8.8:53 | 169.117.168.52.in-addr.arpa | udp |
Files
memory/400-0-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-2-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-9-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-10-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/5032-12-0x00000000010D0000-0x0000000001152000-memory.dmp
memory/5032-14-0x00000000010D0000-0x0000000001152000-memory.dmp
memory/5032-13-0x00000000010D0000-0x0000000001152000-memory.dmp
memory/5032-11-0x00000000010D0000-0x0000000001152000-memory.dmp
memory/400-6-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-3-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-1-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-19-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-20-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-21-0x0000000000E00000-0x0000000000E82000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 77310a616b3510a28f59a91ae773df6c |
| SHA1 | 6870d45cd6eab3d31ad8c1a7080dfc40d6ad493e |
| SHA256 | a8b586fe82550ddeab02e21f99f0dd76b5a7b373ea9b5e8fdcbafbac4e1bf8f1 |
| SHA512 | 42dff0cb1f99a31fc60ed88a954b39459dc2b64874d30b9df5336d6a96830515ad456dd62fd0b97bb3e1f99cf19858d83c19f833cc9fc8ad248424e325e68d00 |
memory/400-26-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-27-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-32-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-34-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-39-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-40-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-45-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-46-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-52-0x0000000000E00000-0x0000000000E82000-memory.dmp
memory/400-53-0x0000000000E00000-0x0000000000E82000-memory.dmp