Analysis Overview
SHA256
3cda160efdccaa80d566e2161b0e0d1541a9cb8d282d7636093e6e249235c1b3
Threat Level: Known bad
The file server.exe was found to be: Known bad.
Malicious Activity Summary
RunningRat payload
Runningrat family
RunningRat
Executes dropped EXE
Sets DLL path for service in the registry
Loads dropped DLL
Drops file in System32 directory
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-08-20 20:37
Signatures
RunningRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Runningrat family
Analysis: behavioral1
Detonation Overview
Submitted
2022-08-20 20:37
Reported
2022-08-20 20:40
Platform
win7-20220812-en
Max time kernel
150s
Max time network
45s
Command Line
Signatures
RunningRat
RunningRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
Sets DLL path for service in the registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\NETSRDSLS\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7076158.dll" | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\ini.ini | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Windows\SysWOW64\NETSRDSLS.exe | C:\Windows\SysWOW64\svchost.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\NETSRDSLS.exe | C:\Windows\SysWOW64\svchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1524 wrote to memory of 864 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
| PID 1524 wrote to memory of 864 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
| PID 1524 wrote to memory of 864 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
| PID 1524 wrote to memory of 864 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"
C:\Windows\SysWOW64\NETSRDSLS.exe
C:\Windows\system32\NETSRDSLS.exe "c:\users\admin\appdata\local\temp\7076158.dll",MainThread
Network
| Country | Destination | Domain | Proto |
| SG | 43.128.99.124:520 | tcp | |
| SG | 43.128.99.124:520 | tcp |
Files
memory/1908-54-0x0000000010000000-0x000000001000F000-memory.dmp
memory/1908-58-0x00000000762F1000-0x00000000762F3000-memory.dmp
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
memory/1908-60-0x00000000001F0000-0x00000000001FD000-memory.dmp
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
\??\c:\users\admin\appdata\local\temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
\Windows\SysWOW64\NETSRDSLS.exe
| MD5 | 51138beea3e2c21ec44d0932c71762a8 |
| SHA1 | 8939cf35447b22dd2c6e6f443446acc1bf986d58 |
| SHA256 | 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124 |
| SHA512 | 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d |
C:\Windows\SysWOW64\NETSRDSLS.exe
| MD5 | 51138beea3e2c21ec44d0932c71762a8 |
| SHA1 | 8939cf35447b22dd2c6e6f443446acc1bf986d58 |
| SHA256 | 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124 |
| SHA512 | 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d |
memory/864-65-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
C:\Windows\SysWOW64\NETSRDSLS.exe
| MD5 | 51138beea3e2c21ec44d0932c71762a8 |
| SHA1 | 8939cf35447b22dd2c6e6f443446acc1bf986d58 |
| SHA256 | 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124 |
| SHA512 | 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d |
\Users\Admin\AppData\Local\Temp\7076158.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
Analysis: behavioral2
Detonation Overview
Submitted
2022-08-20 20:37
Reported
2022-08-20 20:40
Platform
win10v2004-20220812-en
Max time kernel
151s
Max time network
153s
Command Line
Signatures
RunningRat
RunningRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
Sets DLL path for service in the registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NETSRDSLS\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\240545031.dll" | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\svchost.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\NETSRDSLS.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\ini.ini | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File created | C:\Windows\SysWOW64\NETSRDSLS.exe | C:\Windows\SysWOW64\svchost.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\NETSRDSLS.exe | C:\Windows\SysWOW64\svchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4932 wrote to memory of 2040 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
| PID 4932 wrote to memory of 2040 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
| PID 4932 wrote to memory of 2040 | N/A | C:\Windows\SysWOW64\svchost.exe | C:\Windows\SysWOW64\NETSRDSLS.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"
C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"
C:\Windows\SysWOW64\NETSRDSLS.exe
C:\Windows\system32\NETSRDSLS.exe "c:\users\admin\appdata\local\temp\240545031.dll",MainThread
Network
| Country | Destination | Domain | Proto |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| SG | 43.128.99.124:520 | tcp | |
| US | 8.253.225.254:80 | tcp | |
| US | 8.253.225.254:80 | tcp | |
| US | 209.197.3.8:80 | tcp | |
| US | 209.197.3.8:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| SG | 43.128.99.124:520 | tcp |
Files
memory/836-132-0x0000000010000000-0x000000001000F000-memory.dmp
memory/836-138-0x0000000000510000-0x000000000051D000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\240545031.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
C:\Users\Admin\AppData\Local\Temp\240545031.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
C:\Users\Admin\AppData\Local\Temp\240545031.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
\??\c:\users\admin\appdata\local\temp\240545031.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
memory/2040-141-0x0000000000000000-mapping.dmp
C:\Windows\SysWOW64\NETSRDSLS.exe
| MD5 | 889b99c52a60dd49227c5e485a016679 |
| SHA1 | 8fa889e456aa646a4d0a4349977430ce5fa5e2d7 |
| SHA256 | 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910 |
| SHA512 | 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641 |
C:\Users\Admin\AppData\Local\Temp\240545031.dll
| MD5 | dc1e8352301906fff28e0b5333370920 |
| SHA1 | 115aa527bc1e9cbd6787b2635975bb645033a9f8 |
| SHA256 | 278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15 |
| SHA512 | 86135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13 |
C:\Windows\SysWOW64\NETSRDSLS.exe
| MD5 | 889b99c52a60dd49227c5e485a016679 |
| SHA1 | 8fa889e456aa646a4d0a4349977430ce5fa5e2d7 |
| SHA256 | 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910 |
| SHA512 | 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641 |