Malware Analysis Report

2024-10-24 17:03

Sample ID 220905-zcyhbsheg6
Target server.exe
SHA256 8c210c79c2b7c4ea35fa08d0c994a3ab26f50ee639c497f341b20da965cfbd1b
Tags
runningrat persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8c210c79c2b7c4ea35fa08d0c994a3ab26f50ee639c497f341b20da965cfbd1b

Threat Level: Known bad

The file server.exe was found to be: Known bad.

Malicious Activity Summary

runningrat persistence rat

Runningrat family

RunningRat

RunningRat payload

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

Analysis: static1

Detonation Overview

Reported

2022-09-05 20:35

Signatures

RunningRat payload

Description Indicator Process Target
N/A N/A N/A N/A

Runningrat family

runningrat

Analysis: behavioral1

Detonation Overview

Submitted

2022-09-05 20:34

Reported

2022-09-05 20:37

Platform

win7-20220812-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\server.exe"

Signatures

RunningRat

rat 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\SRDSL.exe N/A

Sets DLL path for service in the registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SRDSL\Parameters\ServiceDll = "C:\\Windows\\system32\\7075362.dll" C:\Users\Admin\AppData\Local\Temp\server.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\SRDSL.exe C:\Windows\SysWOW64\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SRDSL.exe C:\Windows\SysWOW64\svchost.exe N/A
File created C:\Windows\SysWOW64\7075362.dll C:\Users\Admin\AppData\Local\Temp\server.exe N/A
File opened for modification C:\Windows\SysWOW64\ini.ini C:\Users\Admin\AppData\Local\Temp\server.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1992 wrote to memory of 1384 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1992 wrote to memory of 1384 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1992 wrote to memory of 1384 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1992 wrote to memory of 1384 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.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 "SRDSL"

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe -k "SRDSL"

C:\Windows\SysWOW64\SRDSL.exe

C:\Windows\system32\SRDSL.exe "c:\windows\system32\7075362.dll",MainThread

Network

Country Destination Domain Proto
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp

Files

memory/1948-54-0x0000000010000000-0x000000001000F000-memory.dmp

memory/1948-58-0x00000000764D1000-0x00000000764D3000-memory.dmp

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

memory/1948-60-0x0000000000350000-0x000000000035D000-memory.dmp

\??\c:\windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

\Windows\SysWOW64\SRDSL.exe

MD5 51138beea3e2c21ec44d0932c71762a8
SHA1 8939cf35447b22dd2c6e6f443446acc1bf986d58
SHA256 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124
SHA512 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

C:\Windows\SysWOW64\SRDSL.exe

MD5 51138beea3e2c21ec44d0932c71762a8
SHA1 8939cf35447b22dd2c6e6f443446acc1bf986d58
SHA256 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124
SHA512 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

\Windows\SysWOW64\7075362.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

C:\Windows\SysWOW64\SRDSL.exe

MD5 51138beea3e2c21ec44d0932c71762a8
SHA1 8939cf35447b22dd2c6e6f443446acc1bf986d58
SHA256 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124
SHA512 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

memory/1384-65-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-09-05 20:34

Reported

2022-09-05 20:37

Platform

win10v2004-20220812-en

Max time kernel

146s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\server.exe"

Signatures

RunningRat

rat 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\SRDSL.exe N/A

Sets DLL path for service in the registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SRDSL\Parameters\ServiceDll = "C:\\Windows\\system32\\240544968.dll" C:\Users\Admin\AppData\Local\Temp\server.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\240544968.dll C:\Users\Admin\AppData\Local\Temp\server.exe N/A
File opened for modification C:\Windows\SysWOW64\ini.ini C:\Users\Admin\AppData\Local\Temp\server.exe N/A
File created C:\Windows\SysWOW64\SRDSL.exe C:\Windows\SysWOW64\svchost.exe N/A
File opened for modification C:\Windows\SysWOW64\SRDSL.exe C:\Windows\SysWOW64\svchost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1092 wrote to memory of 4224 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1092 wrote to memory of 4224 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1092 wrote to memory of 4224 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.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 "SRDSL"

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe -k "SRDSL"

C:\Windows\SysWOW64\SRDSL.exe

C:\Windows\system32\SRDSL.exe "c:\windows\system32\240544968.dll",MainThread

Network

Country Destination Domain Proto
IE 20.190.159.75:443 tcp
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
US 20.189.173.10:443 tcp
BE 8.238.110.126:80 tcp
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp

Files

memory/4940-132-0x0000000010000000-0x000000001000F000-memory.dmp

C:\Windows\SysWOW64\240544968.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

C:\Windows\SysWOW64\240544968.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

memory/4940-138-0x00000000006A0000-0x00000000006AD000-memory.dmp

C:\Windows\SysWOW64\240544968.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

\??\c:\windows\SysWOW64\240544968.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

memory/4224-141-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\SRDSL.exe

MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

C:\Windows\SysWOW64\240544968.dll

MD5 634b470e1b1ec228a45c00ce28d334c3
SHA1 6b052961a9b3948c8b6d7d047aadbd3b7b07318b
SHA256 0f7daab8995595fa6ef8a16e90b1eb3d8f5e9a57bb75543dda1c92394804fe2e
SHA512 39ce51d412cf1b9c16bbb545aba4e52c2ecce476aa526157f61c921bf915c0f0b6389f912640ed83e71951562f21949e14e3abed2b7c2eb53d0fa6910356b827

C:\Windows\SysWOW64\SRDSL.exe

MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641