Analysis Overview
SHA256
4b80f8820d44f0b53482e7a5a5cfe6d44a0e2799055526e83d3779a241b4a639
Threat Level: Known bad
The file remcos_a.exe was found to be: Known bad.
Malicious Activity Summary
Remcos family
UAC bypass
Remcos
Deletes itself
Suspicious use of SetThreadContext
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious behavior: MapViewOfSection
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Modifies registry class
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-12 21:13
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 21:13
Reported
2024-08-12 21:16
Platform
win7-20240708-en
Max time kernel
117s
Max time network
121s
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 |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WScript.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2820 set thread context of 2812 | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | \??\c:\program files (x86)\internet explorer\iexplore.exe |
| PID 2812 set thread context of 2772 | 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 |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\WScript.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: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.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
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\vypdcxbuvbwcre.vbs"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | software-julia.gl.at.ply.gg | udp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
Files
memory/2812-3-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-4-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-0-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2812-5-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-11-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-6-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2772-16-0x0000000000130000-0x00000000001B2000-memory.dmp
memory/2772-19-0x0000000000130000-0x00000000001B2000-memory.dmp
memory/2772-18-0x0000000000130000-0x00000000001B2000-memory.dmp
memory/2812-9-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2772-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2812-21-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-23-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-22-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-24-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-28-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-29-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-33-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-32-0x0000000000080000-0x0000000000102000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 6d1104542ba8ffaf3ca1fda90b152251 |
| SHA1 | 30c7d86242117b2cfbc3e2ea8ea31fd34df705c4 |
| SHA256 | a7f1b2a1b420c669b14172015544b7da6b8d6bc50cf9c98d57bbe6c689a61abf |
| SHA512 | dc003927fe930325be72de00b59c5a1b8091325409d8c432fbb90b16c6cfc345ffd169cf47bb7a75e421fd68c8826404299a3fd9af0880c83d462bb6c46b39db |
memory/2812-36-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-37-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-40-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-52-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-53-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-56-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-57-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-60-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-61-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-62-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-63-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-64-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-65-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-67-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-85-0x0000000000080000-0x0000000000102000-memory.dmp
memory/2812-74-0x0000000000080000-0x0000000000102000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\vypdcxbuvbwcre.vbs
| MD5 | 088cdc83bbaefe8ed56dafb50c9d61b1 |
| SHA1 | 01a8a9188545dfe84b50b428e4bafc0f65d4719d |
| SHA256 | b74b99fbcd0c68b32e776827b3688f55d8f5746a35e92a82d1a019c91fe87b9c |
| SHA512 | 5710d459135ec2a7e76e27dc799068d48adc909294d6de76140adfdb37c3ae101e71bb4365334fa78e16ba9b55aec168b2ce9d79558d82f255617a0b0a52c5a3 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-12 21:13
Reported
2024-08-12 21:16
Platform
win10v2004-20240802-en
Max time kernel
148s
Max time network
153s
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 |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WScript.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3876 set thread context of 4884 | N/A | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | \??\c:\program files (x86)\internet explorer\iexplore.exe |
| PID 4884 set thread context of 1720 | 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:\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 |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\WScript.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\remcos_a.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings | \??\c:\program files (x86)\internet explorer\iexplore.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: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\program files (x86)\internet explorer\iexplore.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
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\xphtzsrhnwdktvumxxvuip.vbs"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | software-julia.gl.at.ply.gg | udp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 21.221.185.147.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.33.237.178.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.58.20.217.in-addr.arpa | udp |
| 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 |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
| US | 147.185.221.21:17106 | software-julia.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
Files
memory/4884-0-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-9-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-8-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/1720-13-0x0000000000970000-0x00000000009F2000-memory.dmp
memory/1720-14-0x0000000000970000-0x00000000009F2000-memory.dmp
memory/1720-15-0x0000000000970000-0x00000000009F2000-memory.dmp
memory/1720-12-0x0000000000970000-0x00000000009F2000-memory.dmp
memory/4884-16-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-2-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-1-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-18-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-19-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-20-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-24-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-25-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-28-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-31-0x0000000000B00000-0x0000000000B82000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 3968c455b9033c36c2f86a3790a44522 |
| SHA1 | 8cacd91f64a20f964fb213d0170b3e51f3cdd12f |
| SHA256 | da1ea7d475b44050e63f7df03ba247d0c731526fee40bb4b8b0890aeee0b434e |
| SHA512 | e0283037c7c72b327073bc1ee8bd7840bdc0f43f562db6a156630cd388c90419107f55d010a7a2c9f1d1faabed617a587228dc2ff483539b99741be91b07b09a |
memory/4884-33-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-34-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-45-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-46-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-49-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-50-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-53-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-54-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-56-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-58-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-59-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-60-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-61-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-62-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-63-0x0000000000B00000-0x0000000000B82000-memory.dmp
memory/4884-69-0x0000000000B00000-0x0000000000B82000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\xphtzsrhnwdktvumxxvuip.vbs
| MD5 | 088cdc83bbaefe8ed56dafb50c9d61b1 |
| SHA1 | 01a8a9188545dfe84b50b428e4bafc0f65d4719d |
| SHA256 | b74b99fbcd0c68b32e776827b3688f55d8f5746a35e92a82d1a019c91fe87b9c |
| SHA512 | 5710d459135ec2a7e76e27dc799068d48adc909294d6de76140adfdb37c3ae101e71bb4365334fa78e16ba9b55aec168b2ce9d79558d82f255617a0b0a52c5a3 |