Analysis Overview
SHA256
710c780494b8c14c5f9167014ea8d75638d506c5dd674c5ce9aa95a3b991e001
Threat Level: Known bad
The file c000c20f354b21e121f89647fcc8ce60N.exe was found to be: Known bad.
Malicious Activity Summary
Remcos
Remcos family
Loads dropped DLL
Checks computer location settings
Executes dropped EXE
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetWindowsHookEx
Suspicious behavior: GetForegroundWindowSpam
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-07-23 13:26
Signatures
Remcos family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-07-23 13:26
Reported
2024-07-23 13:28
Platform
win7-20240708-en
Max time kernel
118s
Max time network
123s
Command Line
Signatures
Remcos
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000\Software\Microsoft\Windows\CurrentVersion\Run\msword = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\msword.exe\"" | C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000\Software\Microsoft\Windows\CurrentVersion\Run\msword = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\msword.exe\"" | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2776 set thread context of 2736 | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | C:\Windows\SysWOW64\svchost.exe |
Enumerates physical storage devices
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe
"C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\msword.exe"
C:\Users\Admin\AppData\Roaming\remcos\msword.exe
C:\Users\Admin\AppData\Roaming\remcos\msword.exe
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 23.105.131.212:9000 | tcp | |
| US | 23.105.131.212:9000 | tcp | |
| US | 23.105.131.212:9010 | tcp | |
| US | 23.105.131.212:9010 | tcp | |
| US | 23.105.131.212:9000 | tcp | |
| US | 23.105.131.212:9000 | tcp |
Files
C:\Users\Admin\AppData\Local\Temp\install.vbs
| MD5 | 60a2d14228422987348aff9cd2af3567 |
| SHA1 | 3e5a1e1905a81e94c42f2116f328da58d1d36d83 |
| SHA256 | ba41f84546b3aff28026a3a4712108f5a1c1beb3f563ce9c23c3aa24d13a4984 |
| SHA512 | bb2daee546c4e0e0e39393eee243fbf246ccc64db80e1c57abc4dae0464b23e3f4e6cb588cf7383717aa6b4aa2b1af96af0af3946dca072c99d77aa5825a1d83 |
\Users\Admin\AppData\Roaming\remcos\msword.exe
| MD5 | c000c20f354b21e121f89647fcc8ce60 |
| SHA1 | e10422339e88143cd8187562fc2cf344d6ad5e4d |
| SHA256 | 710c780494b8c14c5f9167014ea8d75638d506c5dd674c5ce9aa95a3b991e001 |
| SHA512 | ca90781ebebe9f95468a0abcb40dc64ec38312c8154f53f67b83a2bd588076436f0e32fc1e3156234e0ad29b8a92e512997cd28dc9686a23a5088a7c4ed29772 |
memory/2736-9-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-11-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-22-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2736-19-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-17-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-15-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-13-0x0000000000400000-0x0000000000420000-memory.dmp
memory/2736-23-0x0000000000400000-0x0000000000420000-memory.dmp
C:\Users\Admin\AppData\Roaming\remcos\logs.dat
| MD5 | b157450411cb20c064a1dbd0abed2a78 |
| SHA1 | dc8d36a42f3577f2d1a9ee9b70b918e8562b6081 |
| SHA256 | 037bf0df7b230a32a6357eebd8cfcccd55ef032d474ec7453a97ede1abc8bed2 |
| SHA512 | 68903924a6e4618737a68ecdab4a488f28d90f54d26f2f79a1fccb19d116b0ab8d4cc980897229db1fb732cb6b6c315ce13c9e079e3a93f72efce19da4c34ca6 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-07-23 13:26
Reported
2024-07-23 13:29
Platform
win10v2004-20240709-en
Max time kernel
119s
Max time network
120s
Command Line
Signatures
Remcos
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation | C:\Windows\SysWOW64\WScript.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\msword = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\msword.exe\"" | C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\msword = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\msword.exe\"" | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2128 set thread context of 3684 | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | C:\Windows\SysWOW64\svchost.exe |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\remcos\msword.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe
"C:\Users\Admin\AppData\Local\Temp\c000c20f354b21e121f89647fcc8ce60N.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\msword.exe"
C:\Users\Admin\AppData\Roaming\remcos\msword.exe
C:\Users\Admin\AppData\Roaming\remcos\msword.exe
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 23.105.131.212:9000 | tcp | |
| US | 13.107.21.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.21.107.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 23.105.131.212:9000 | tcp | |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 147.142.123.92.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 | 88.156.103.20.in-addr.arpa | udp |
| US | 23.105.131.212:9010 | tcp | |
| US | 8.8.8.8:53 | 240.143.123.92.in-addr.arpa | udp |
| US | 23.105.131.212:9010 | tcp | |
| US | 23.105.131.212:9000 | tcp | |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 23.105.131.212:9000 | tcp |
Files
C:\Users\Admin\AppData\Local\Temp\install.vbs
| MD5 | 60a2d14228422987348aff9cd2af3567 |
| SHA1 | 3e5a1e1905a81e94c42f2116f328da58d1d36d83 |
| SHA256 | ba41f84546b3aff28026a3a4712108f5a1c1beb3f563ce9c23c3aa24d13a4984 |
| SHA512 | bb2daee546c4e0e0e39393eee243fbf246ccc64db80e1c57abc4dae0464b23e3f4e6cb588cf7383717aa6b4aa2b1af96af0af3946dca072c99d77aa5825a1d83 |
C:\Users\Admin\AppData\Roaming\remcos\msword.exe
| MD5 | c000c20f354b21e121f89647fcc8ce60 |
| SHA1 | e10422339e88143cd8187562fc2cf344d6ad5e4d |
| SHA256 | 710c780494b8c14c5f9167014ea8d75638d506c5dd674c5ce9aa95a3b991e001 |
| SHA512 | ca90781ebebe9f95468a0abcb40dc64ec38312c8154f53f67b83a2bd588076436f0e32fc1e3156234e0ad29b8a92e512997cd28dc9686a23a5088a7c4ed29772 |
memory/3684-8-0x0000000000400000-0x0000000000420000-memory.dmp
memory/3684-10-0x0000000000400000-0x0000000000420000-memory.dmp
memory/3684-11-0x0000000000400000-0x0000000000420000-memory.dmp
C:\Users\Admin\AppData\Roaming\remcos\logs.dat
| MD5 | 9923d0a2bea55059030e7375a3c9816e |
| SHA1 | 16b457c9fcc6cfcb169bc247a1cd04a6f6dca33b |
| SHA256 | e05dfbf0aad34d1f2e472767e69607a656435ee262ecb15071ecc029744c8c06 |
| SHA512 | 8b14575a54a582f8619faca37d8c22b1e7f640d148b2f78c93e9b5200c43277c1cea7027178cc02d751094a72060978a5f0d0cb727075a78ca8f4fc97862c214 |