Malware Analysis Report

2024-10-24 17:03

Sample ID 220820-zdj2bsgddj
Target server.exe
SHA256 3cda160efdccaa80d566e2161b0e0d1541a9cb8d282d7636093e6e249235c1b3
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

3cda160efdccaa80d566e2161b0e0d1541a9cb8d282d7636093e6e249235c1b3

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

2022-08-20 20:36

Signatures

RunningRat payload

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

Runningrat family

runningrat

Analysis: behavioral1

Detonation Overview

Submitted

2022-08-20 20:36

Reported

2022-08-20 20:38

Platform

win7-20220812-en

Max time kernel

150s

Max time network

154s

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\NETSRDSLS.exe N/A

Sets DLL path for service in the registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\NETSRDSLS\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7084161.dll" C:\Users\Admin\AppData\Local\Temp\server.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 944 wrote to memory of 1040 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\NETSRDSLS.exe
PID 944 wrote to memory of 1040 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\NETSRDSLS.exe
PID 944 wrote to memory of 1040 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\NETSRDSLS.exe
PID 944 wrote to memory of 1040 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\7084161.dll",MainThread

Network

Country Destination Domain Proto
SG 43.128.99.124:520 tcp
SG 43.128.99.124:520 tcp

Files

memory/1056-54-0x0000000010000000-0x000000001000F000-memory.dmp

memory/1056-58-0x0000000075801000-0x0000000075803000-memory.dmp

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

memory/1056-60-0x0000000000250000-0x000000000025D000-memory.dmp

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

\??\c:\users\admin\appdata\local\temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

\Windows\SysWOW64\NETSRDSLS.exe

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

memory/1040-65-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\NETSRDSLS.exe

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

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

C:\Windows\SysWOW64\NETSRDSLS.exe

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

\Users\Admin\AppData\Local\Temp\7084161.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

Analysis: behavioral2

Detonation Overview

Submitted

2022-08-20 20:36

Reported

2022-08-20 20:38

Platform

win10v2004-20220812-en

Max time kernel

146s

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\NETSRDSLS.exe N/A

Sets DLL path for service in the registry

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NETSRDSLS\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\240562515.dll" C:\Users\Admin\AppData\Local\Temp\server.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 5016 wrote to memory of 808 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\NETSRDSLS.exe
PID 5016 wrote to memory of 808 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\NETSRDSLS.exe
PID 5016 wrote to memory of 808 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\240562515.dll",MainThread

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
SG 43.128.99.124:520 tcp
US 209.197.3.8:80 tcp
NL 104.80.225.205:443 tcp
FR 51.11.192.48:443 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
US 93.184.220.29:80 tcp
SG 43.128.99.124:520 tcp

Files

memory/4016-132-0x0000000010000000-0x000000001000F000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\240562515.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

memory/4016-138-0x00000000006E0000-0x00000000006ED000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\240562515.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

\??\c:\users\admin\appdata\local\temp\240562515.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

C:\Users\Admin\AppData\Local\Temp\240562515.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556

C:\Windows\SysWOW64\NETSRDSLS.exe

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

memory/808-141-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\NETSRDSLS.exe

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

C:\Users\Admin\AppData\Local\Temp\240562515.dll

MD5 efb245b9ecee514779529b298b28d0e4
SHA1 fbc99bf7855536f53d5475aa587f3a5669df11f4
SHA256 d935a3ea157a822d3e5f06af7aa3b7112634984a38c7314577e6d75905bca5e9
SHA512 23331f00547b192aed5462dcf62ca93f2ebe0f653af4c5775e76888adeb41c7263c3c00317cf74fc4e3dde2b2bbb1d178d5b749102bc4a39e789f666d0154556