Malware Analysis Report

2024-11-15 09:22

Sample ID 231117-t4rafaba85
Target NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url
SHA256 640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23
Tags
systembc trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23

Threat Level: Known bad

The file NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Blocklisted process makes network request

Checks computer location settings

Loads dropped DLL

Enumerates physical storage devices

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of FindShellTrayWindow

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-11-17 16:36

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-11-17 16:36

Reported

2023-11-17 16:39

Platform

win7-20231025-en

Max time kernel

117s

Max time network

120s

Command Line

"C:\Windows\System32\rundll32.exe" "C:\Windows\System32\ieframe.dll",OpenURL C:\Users\Admin\AppData\Local\Temp\NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url

Signatures

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\System32\rundll32.exe N/A

Processes

C:\Windows\System32\rundll32.exe

"C:\Windows\System32\rundll32.exe" "C:\Windows\System32\ieframe.dll",OpenURL C:\Users\Admin\AppData\Local\Temp\NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url

Network

N/A

Files

memory/2236-0-0x0000000002170000-0x0000000002171000-memory.dmp

memory/2236-1-0x0000000002170000-0x0000000002171000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-11-17 16:36

Reported

2023-11-17 16:39

Platform

win10v2004-20231023-en

Max time kernel

135s

Max time network

154s

Command Line

"C:\Windows\System32\rundll32.exe" "C:\Windows\System32\ieframe.dll",OpenURL C:\Users\Admin\AppData\Local\Temp\NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url

Signatures

SystemBC

trojan systembc

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3125601242-331447593-1512828465-1000\Control Panel\International\Geo\Nation C:\Windows\System32\rundll32.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3125601242-331447593-1512828465-1000_Classes\Local Settings C:\Windows\System32\rundll32.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\System32\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4320 wrote to memory of 4164 N/A C:\Windows\System32\rundll32.exe C:\Windows\System32\control.exe
PID 4320 wrote to memory of 4164 N/A C:\Windows\System32\rundll32.exe C:\Windows\System32\control.exe
PID 4164 wrote to memory of 448 N/A C:\Windows\System32\control.exe C:\Windows\system32\rundll32.exe
PID 4164 wrote to memory of 448 N/A C:\Windows\System32\control.exe C:\Windows\system32\rundll32.exe
PID 448 wrote to memory of 2036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 448 wrote to memory of 2036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 448 wrote to memory of 2036 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\System32\rundll32.exe

"C:\Windows\System32\rundll32.exe" "C:\Windows\System32\ieframe.dll",OpenURL C:\Users\Admin\AppData\Local\Temp\NEAS.640ef9afce45a61a02970462b829bf37a845948c17d72577dc70c1c21aa55b23.url

C:\Windows\System32\control.exe

"C:\Windows\System32\control.exe" "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" Shell32.dll,Control_RunDLL "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",

C:\Windows\SysWOW64\rundll32.exe

"C:\Windows\SysWOW64\rundll32.exe" "C:\Windows\SysWOW64\shell32.dll",#44 "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl",

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
RU 62.173.141.118:445 tcp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 118.141.173.62.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 198.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 65.252.72.23.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
RU 62.173.140.37:4001 tcp
US 8.8.8.8:53 37.140.173.62.in-addr.arpa udp
US 8.8.8.8:53 9.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl

MD5 cac81707eba1be452f548e410275a0ac
SHA1 dd4b3bbd8bf357bbdeeb593e94ff0bf9b5ae19f2
SHA256 2f120d396f71ff9adb8fe11f0b529e8ddea8355837d955fed83bb0ae2a35de84
SHA512 01b6b45ec3c5ef4a0162164dfd69c15b08ed37082778ef97d0f1486bc82b4b1659a90705a4d9be42b9d25c8776e20011845a9f5e4498400b11cf14a3310df8d7

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E51EX1F6\wizard[1].cpl

MD5 cac81707eba1be452f548e410275a0ac
SHA1 dd4b3bbd8bf357bbdeeb593e94ff0bf9b5ae19f2
SHA256 2f120d396f71ff9adb8fe11f0b529e8ddea8355837d955fed83bb0ae2a35de84
SHA512 01b6b45ec3c5ef4a0162164dfd69c15b08ed37082778ef97d0f1486bc82b4b1659a90705a4d9be42b9d25c8776e20011845a9f5e4498400b11cf14a3310df8d7