Analysis Overview
SHA256
b0e4ffe4f149f9b6435fec757518ae2ba99293d416a28a3aebda4e877c2013e0
Threat Level: Known bad
The file b4b3024e4530395f1befe7e000e521aa was found to be: Known bad.
Malicious Activity Summary
Njrat family
Modifies Windows Firewall
Drops startup file
Legitimate hosting services abused for malware hosting/C2
Unsigned PE
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-05 12:30
Signatures
Njrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-05 12:30
Reported
2024-03-05 12:33
Platform
win7-20240221-en
Max time kernel
150s
Max time network
154s
Command Line
Signatures
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\44c547a0effac0a63bd21d0ef5280986Windows Update.exe | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\44c547a0effac0a63bd21d0ef5280986Windows Update.exe | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe
"C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe" "b4b3024e4530395f1befe7e000e521aa.exe" ENABLE
C:\Windows\SysWOW64\netsh.exe
netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe" "b4b3024e4530395f1befe7e000e521aa.exe" ENABLE
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
Files
memory/2352-0-0x0000000074F40000-0x00000000754EB000-memory.dmp
memory/2352-1-0x0000000074F40000-0x00000000754EB000-memory.dmp
memory/2352-2-0x00000000002C0000-0x0000000000300000-memory.dmp
memory/2352-7-0x0000000074F40000-0x00000000754EB000-memory.dmp
memory/2352-8-0x0000000074F40000-0x00000000754EB000-memory.dmp
memory/2352-9-0x00000000002C0000-0x0000000000300000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-05 12:30
Reported
2024-03-05 12:33
Platform
win10v2004-20240226-en
Max time kernel
149s
Max time network
152s
Command Line
Signatures
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\44c547a0effac0a63bd21d0ef5280986Windows Update.exe | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\44c547a0effac0a63bd21d0ef5280986Windows Update.exe | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
Legitimate hosting services abused for malware hosting/C2
| Description | Indicator | Process | Target |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
| N/A | 6.tcp.ngrok.io | N/A | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe
"C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe" "b4b3024e4530395f1befe7e000e521aa.exe" ENABLE
C:\Windows\SysWOW64\netsh.exe
netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\b4b3024e4530395f1befe7e000e521aa.exe" "b4b3024e4530395f1befe7e000e521aa.exe" ENABLE
Network
| Country | Destination | Domain | Proto |
| 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 | 175.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 33.134.221.88.in-addr.arpa | udp |
| US | 3.132.159.158:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 30.243.111.52.in-addr.arpa | udp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| 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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 3.141.142.211:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 17.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 6.tcp.ngrok.io | udp |
| US | 3.141.177.1:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.177.1:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.177.1:17284 | 6.tcp.ngrok.io | tcp |
| US | 3.141.177.1:17284 | 6.tcp.ngrok.io | tcp |
| US | 8.8.8.8:53 | 35.197.79.40.in-addr.arpa | udp |
Files
memory/3056-0-0x00000000755A0000-0x0000000075B51000-memory.dmp
memory/3056-1-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/3056-2-0x00000000755A0000-0x0000000075B51000-memory.dmp
memory/3056-7-0x00000000755A0000-0x0000000075B51000-memory.dmp
memory/3056-8-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/3056-9-0x00000000755A0000-0x0000000075B51000-memory.dmp