Malware Analysis Report

2024-10-24 17:03

Sample ID 220905-zexc2shfa9
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 payload

Runningrat family

RunningRat

Sets DLL path for service in the registry

Executes dropped EXE

Loads dropped DLL

Drops file in System32 directory

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-09-05 20:38

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 20:38

Reported

2022-09-05 21:08

Platform

win7-20220812-en

Max time kernel

1732s

Max time network

1746s

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\\7072242.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\7072242.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 1628 wrote to memory of 1576 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1628 wrote to memory of 1576 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1628 wrote to memory of 1576 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 1628 wrote to memory of 1576 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\7072242.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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp

Files

memory/2000-54-0x0000000010000000-0x000000001000F000-memory.dmp

memory/2000-58-0x0000000075501000-0x0000000075503000-memory.dmp

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

memory/2000-60-0x0000000000250000-0x000000000025D000-memory.dmp

\??\c:\windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

\Windows\SysWOW64\SRDSL.exe

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

C:\Windows\SysWOW64\SRDSL.exe

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

memory/1576-65-0x0000000000000000-mapping.dmp

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

C:\Windows\SysWOW64\SRDSL.exe

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

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

\Windows\SysWOW64\7072242.dll

MD5 155fc1bc598f45bb07aa3eed4906bd63
SHA1 31ff0c1b9a8497cdafe493d3e31e912d44f77a2c
SHA256 4a8d43c608b29b0f9185fc75b61e7211a01cfdfeff690f284fe38d8303276918
SHA512 2aba669296dac9950d4a952010a314b6bca6e5e0bfcdd975249592c637166142739578ca97771aa3488a24f34ee9e6f1df1284b90f455bcf6a8f5cd9742d35db

Analysis: behavioral2

Detonation Overview

Submitted

2022-09-05 20:38

Reported

2022-09-05 21:08

Platform

win10v2004-20220901-en

Max time kernel

1699s

Max time network

1718s

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\\240561031.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\240561031.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 3632 wrote to memory of 2880 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 3632 wrote to memory of 2880 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\SRDSL.exe
PID 3632 wrote to memory of 2880 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\240561031.dll",MainThread

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
NL 104.80.225.205:443 tcp
US 20.189.173.12:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
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
HK 20.187.77.247:53762 gd.baojie666.buzz tcp
US 8.8.8.8:53 gd.baojie666.buzz udp
HK 20.187.77.247:53762 gd.baojie666.buzz tcp

Files

memory/5012-132-0x0000000010000000-0x000000001000F000-memory.dmp

C:\Windows\SysWOW64\240561031.dll

MD5 4241e76489e5d5e3526612c4ec56aabc
SHA1 bb2e44a1ccf0a17bc9af27e734fe47059349a2e9
SHA256 f733e625c1945c532f7df6f285b6ad33a4f614e707a34da9ab3c4776956e00c1
SHA512 a9e5550677bbef223b697c8664f2bc9bf098b73d79399dadfd8568381a843e7e0f7c8639db433469c1240e8f2bd5e30d63b2298155d2179f1a77371c5cfda0c6

C:\Windows\SysWOW64\240561031.dll

MD5 4241e76489e5d5e3526612c4ec56aabc
SHA1 bb2e44a1ccf0a17bc9af27e734fe47059349a2e9
SHA256 f733e625c1945c532f7df6f285b6ad33a4f614e707a34da9ab3c4776956e00c1
SHA512 a9e5550677bbef223b697c8664f2bc9bf098b73d79399dadfd8568381a843e7e0f7c8639db433469c1240e8f2bd5e30d63b2298155d2179f1a77371c5cfda0c6

memory/5012-138-0x00000000008A0000-0x00000000008AD000-memory.dmp

C:\Windows\SysWOW64\240561031.dll

MD5 4241e76489e5d5e3526612c4ec56aabc
SHA1 bb2e44a1ccf0a17bc9af27e734fe47059349a2e9
SHA256 f733e625c1945c532f7df6f285b6ad33a4f614e707a34da9ab3c4776956e00c1
SHA512 a9e5550677bbef223b697c8664f2bc9bf098b73d79399dadfd8568381a843e7e0f7c8639db433469c1240e8f2bd5e30d63b2298155d2179f1a77371c5cfda0c6

\??\c:\windows\SysWOW64\240561031.dll

MD5 4241e76489e5d5e3526612c4ec56aabc
SHA1 bb2e44a1ccf0a17bc9af27e734fe47059349a2e9
SHA256 f733e625c1945c532f7df6f285b6ad33a4f614e707a34da9ab3c4776956e00c1
SHA512 a9e5550677bbef223b697c8664f2bc9bf098b73d79399dadfd8568381a843e7e0f7c8639db433469c1240e8f2bd5e30d63b2298155d2179f1a77371c5cfda0c6

memory/2880-141-0x0000000000000000-mapping.dmp

C:\Windows\SysWOW64\SRDSL.exe

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

C:\Windows\SysWOW64\SRDSL.exe

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

C:\Windows\SysWOW64\240561031.dll

MD5 4241e76489e5d5e3526612c4ec56aabc
SHA1 bb2e44a1ccf0a17bc9af27e734fe47059349a2e9
SHA256 f733e625c1945c532f7df6f285b6ad33a4f614e707a34da9ab3c4776956e00c1
SHA512 a9e5550677bbef223b697c8664f2bc9bf098b73d79399dadfd8568381a843e7e0f7c8639db433469c1240e8f2bd5e30d63b2298155d2179f1a77371c5cfda0c6