Analysis
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max time kernel
151s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
20-08-2022 20:37
Behavioral task
behavioral1
Sample
server.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
server.exe
Resource
win10v2004-20220812-en
General
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Target
server.exe
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Size
68KB
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MD5
b6e11c84a80412f8cb7330ab9fcc149e
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SHA1
266266241adc1907f2e6d8d1d15f8aeff89deb78
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SHA256
3cda160efdccaa80d566e2161b0e0d1541a9cb8d282d7636093e6e249235c1b3
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SHA512
f6a68c18e662dabdd9fa1e1eb8b92e91642fda4dae7fda4847b37b9e2408d97e45996cae14b6c0afc4c8068c18e2f945f4c0c0726c4b4009876636a4dbb46784
Malware Config
Signatures
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RunningRat
RunningRat is a remote access trojan first seen in 2018.
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RunningRat payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/836-132-0x0000000010000000-0x000000001000F000-memory.dmp family_runningrat -
Executes dropped EXE 1 IoCs
Processes:
NETSRDSLS.exepid process 2040 NETSRDSLS.exe -
Sets DLL path for service in the registry 2 TTPs 1 IoCs
Processes:
server.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NETSRDSLS\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\240545031.dll" server.exe -
Loads dropped DLL 4 IoCs
Processes:
server.exesvchost.exeNETSRDSLS.exepid process 836 server.exe 836 server.exe 4932 svchost.exe 2040 NETSRDSLS.exe -
Drops file in System32 directory 3 IoCs
Processes:
server.exesvchost.exedescription ioc process File opened for modification C:\Windows\SysWOW64\ini.ini server.exe File created C:\Windows\SysWOW64\NETSRDSLS.exe svchost.exe File opened for modification C:\Windows\SysWOW64\NETSRDSLS.exe svchost.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
svchost.exedescription pid process target process PID 4932 wrote to memory of 2040 4932 svchost.exe NETSRDSLS.exe PID 4932 wrote to memory of 2040 4932 svchost.exe NETSRDSLS.exe PID 4932 wrote to memory of 2040 4932 svchost.exe NETSRDSLS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\server.exe"C:\Users\Admin\AppData\Local\Temp\server.exe"1⤵
- Sets DLL path for service in the registry
- Loads dropped DLL
- Drops file in System32 directory
PID:836
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"1⤵PID:2340
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4932 -
C:\Windows\SysWOW64\NETSRDSLS.exeC:\Windows\system32\NETSRDSLS.exe "c:\users\admin\appdata\local\temp\240545031.dll",MainThread2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:2040
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
37KB
MD5dc1e8352301906fff28e0b5333370920
SHA1115aa527bc1e9cbd6787b2635975bb645033a9f8
SHA256278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15
SHA51286135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13
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Filesize
37KB
MD5dc1e8352301906fff28e0b5333370920
SHA1115aa527bc1e9cbd6787b2635975bb645033a9f8
SHA256278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15
SHA51286135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13
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Filesize
37KB
MD5dc1e8352301906fff28e0b5333370920
SHA1115aa527bc1e9cbd6787b2635975bb645033a9f8
SHA256278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15
SHA51286135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13
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Filesize
37KB
MD5dc1e8352301906fff28e0b5333370920
SHA1115aa527bc1e9cbd6787b2635975bb645033a9f8
SHA256278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15
SHA51286135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13
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Filesize
60KB
MD5889b99c52a60dd49227c5e485a016679
SHA18fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA2566cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA51208933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
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Filesize
60KB
MD5889b99c52a60dd49227c5e485a016679
SHA18fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA2566cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA51208933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
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Filesize
37KB
MD5dc1e8352301906fff28e0b5333370920
SHA1115aa527bc1e9cbd6787b2635975bb645033a9f8
SHA256278e1137e3880bc5404ac5fa7f0b8670b231d128f872d612865546b110c47e15
SHA51286135b36789452b647e2f1657d3f73da708a71e368be6579110df6c54a248e855f2616763a48186024ab028bae3f2e28b8edb8c64634db92a91a220e81a93d13