Analysis
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max time kernel
147s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
07-09-2022 11:35
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
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SSDEEP
768:BCB8S+OR7dOahyoHokBtqN74W7bZZmYb9PyzcjRlYlwa6NVdkPnJJMIBV:BHJaAoHoc2x7bZoYBAcQlwJdMF
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/1964-132-0x0000000010000000-0x000000001000F000-memory.dmp family_runningrat -
Executes dropped EXE 1 IoCs
Processes:
NETSRDSLS.exepid process 4952 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\\240546562.dll" server.exe -
Loads dropped DLL 4 IoCs
Processes:
server.exesvchost.exeNETSRDSLS.exepid process 1964 server.exe 1964 server.exe 4316 svchost.exe 4952 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 4316 wrote to memory of 4952 4316 svchost.exe NETSRDSLS.exe PID 4316 wrote to memory of 4952 4316 svchost.exe NETSRDSLS.exe PID 4316 wrote to memory of 4952 4316 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:1964
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k "NETSRDSLS"1⤵PID:4100
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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:4316 -
C:\Windows\SysWOW64\NETSRDSLS.exeC:\Windows\system32\NETSRDSLS.exe "c:\users\admin\appdata\local\temp\240546562.dll",MainThread2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:4952
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
37KB
MD5c2c9feab31e34c2c504763093520bc6f
SHA13bf7741bf7ef126a90f3f268b1bdccdf1d449aa1
SHA2562e977b7991ec9a0d19025079f53610fbf851f79dc1b8452edb631cd990022e3b
SHA512a01d4afd5c8f20d51b8b1893ba9c6ba8e5b5b8c79d05f8b17706d930c35067e5fc80897e1aec1b70f61e14c6ec578ba718d4f7dd9920831f88e9c2d13fe0c481
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Filesize
37KB
MD5c2c9feab31e34c2c504763093520bc6f
SHA13bf7741bf7ef126a90f3f268b1bdccdf1d449aa1
SHA2562e977b7991ec9a0d19025079f53610fbf851f79dc1b8452edb631cd990022e3b
SHA512a01d4afd5c8f20d51b8b1893ba9c6ba8e5b5b8c79d05f8b17706d930c35067e5fc80897e1aec1b70f61e14c6ec578ba718d4f7dd9920831f88e9c2d13fe0c481
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Filesize
37KB
MD5c2c9feab31e34c2c504763093520bc6f
SHA13bf7741bf7ef126a90f3f268b1bdccdf1d449aa1
SHA2562e977b7991ec9a0d19025079f53610fbf851f79dc1b8452edb631cd990022e3b
SHA512a01d4afd5c8f20d51b8b1893ba9c6ba8e5b5b8c79d05f8b17706d930c35067e5fc80897e1aec1b70f61e14c6ec578ba718d4f7dd9920831f88e9c2d13fe0c481
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Filesize
37KB
MD5c2c9feab31e34c2c504763093520bc6f
SHA13bf7741bf7ef126a90f3f268b1bdccdf1d449aa1
SHA2562e977b7991ec9a0d19025079f53610fbf851f79dc1b8452edb631cd990022e3b
SHA512a01d4afd5c8f20d51b8b1893ba9c6ba8e5b5b8c79d05f8b17706d930c35067e5fc80897e1aec1b70f61e14c6ec578ba718d4f7dd9920831f88e9c2d13fe0c481
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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
MD5c2c9feab31e34c2c504763093520bc6f
SHA13bf7741bf7ef126a90f3f268b1bdccdf1d449aa1
SHA2562e977b7991ec9a0d19025079f53610fbf851f79dc1b8452edb631cd990022e3b
SHA512a01d4afd5c8f20d51b8b1893ba9c6ba8e5b5b8c79d05f8b17706d930c35067e5fc80897e1aec1b70f61e14c6ec578ba718d4f7dd9920831f88e9c2d13fe0c481