Analysis Overview
SHA256
7746fe1edf7d4870afa63058d81a2392176c6a869114da74bf2d25e3f12e81d0
Threat Level: Known bad
The file bTkt.exe was found to be: Known bad.
Malicious Activity Summary
Njrat family
njRAT/Bladabindi
Modifies Windows Firewall
Drops startup file
Executes dropped EXE
Checks computer location settings
Loads dropped DLL
Adds Run key to start application
Unsigned PE
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-26 04:08
Signatures
Njrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-26 04:08
Reported
2024-01-26 04:10
Platform
win7-20231215-en
Max time kernel
149s
Max time network
145s
Command Line
Signatures
njRAT/Bladabindi
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| 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\1ee3c79889d2b28c3ab742ae768ba98c.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ee3c79889d2b28c3ab742ae768ba98c.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1603059206-2004189698-4139800220-1000\Software\Microsoft\Windows\CurrentVersion\Run\1ee3c79889d2b28c3ab742ae768ba98c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .." | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\1ee3c79889d2b28c3ab742ae768ba98c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .." | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2612 wrote to memory of 2656 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 2612 wrote to memory of 2656 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 2612 wrote to memory of 2656 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 2612 wrote to memory of 2656 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 2656 wrote to memory of 2792 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
| PID 2656 wrote to memory of 2792 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
| PID 2656 wrote to memory of 2792 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
| PID 2656 wrote to memory of 2792 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\bTkt.exe
"C:\Users\Admin\AppData\Local\Temp\bTkt.exe"
C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
Files
memory/2612-0-0x0000000074BE0000-0x000000007518B000-memory.dmp
memory/2612-1-0x0000000074BE0000-0x000000007518B000-memory.dmp
memory/2612-2-0x00000000022C0000-0x0000000002300000-memory.dmp
\Users\Admin\AppData\Local\Temp\server.exe
| MD5 | c84f89f8dc0ed0a09db3d4eaaa21b903 |
| SHA1 | dcca9287133834459cae17d852885137db0459c0 |
| SHA256 | 7746fe1edf7d4870afa63058d81a2392176c6a869114da74bf2d25e3f12e81d0 |
| SHA512 | 311fcfef170087f01bebc2486c9ee666db8f80d5f8fbf9699f07b6f79a7ca73a65fd87cabd6cf75234012c2a462021adb53dca8e5fc4f451c52d7dc08d77c14e |
memory/2612-11-0x0000000074BE0000-0x000000007518B000-memory.dmp
memory/2656-12-0x00000000021B0000-0x00000000021F0000-memory.dmp
memory/2656-10-0x0000000074BE0000-0x000000007518B000-memory.dmp
memory/2656-13-0x0000000074BE0000-0x000000007518B000-memory.dmp
memory/2656-15-0x0000000074BE0000-0x000000007518B000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-26 04:08
Reported
2024-01-26 04:10
Platform
win10v2004-20231215-en
Max time kernel
154s
Max time network
158s
Command Line
Signatures
njRAT/Bladabindi
Modifies Windows Firewall
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\netsh.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ee3c79889d2b28c3ab742ae768ba98c.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1ee3c79889d2b28c3ab742ae768ba98c.exe | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\1ee3c79889d2b28c3ab742ae768ba98c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .." | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\1ee3c79889d2b28c3ab742ae768ba98c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .." | C:\Users\Admin\AppData\Local\Temp\server.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4220 wrote to memory of 820 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 4220 wrote to memory of 820 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 4220 wrote to memory of 820 | N/A | C:\Users\Admin\AppData\Local\Temp\bTkt.exe | C:\Users\Admin\AppData\Local\Temp\server.exe |
| PID 820 wrote to memory of 2036 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
| PID 820 wrote to memory of 2036 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
| PID 820 wrote to memory of 2036 | N/A | C:\Users\Admin\AppData\Local\Temp\server.exe | C:\Windows\SysWOW64\netsh.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\bTkt.exe
"C:\Users\Admin\AppData\Local\Temp\bTkt.exe"
C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
Network
| Country | Destination | Domain | Proto |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 114.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
| US | 8.8.8.8:53 | 122.10.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | spykronic.duckdns.org | udp |
| BR | 168.232.70.149:1177 | spykronic.duckdns.org | tcp |
Files
memory/4220-0-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/4220-1-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/4220-2-0x0000000001310000-0x0000000001320000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\server.exe
| MD5 | c84f89f8dc0ed0a09db3d4eaaa21b903 |
| SHA1 | dcca9287133834459cae17d852885137db0459c0 |
| SHA256 | 7746fe1edf7d4870afa63058d81a2392176c6a869114da74bf2d25e3f12e81d0 |
| SHA512 | 311fcfef170087f01bebc2486c9ee666db8f80d5f8fbf9699f07b6f79a7ca73a65fd87cabd6cf75234012c2a462021adb53dca8e5fc4f451c52d7dc08d77c14e |
memory/4220-12-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/820-13-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/820-14-0x0000000000CD0000-0x0000000000CE0000-memory.dmp
memory/820-15-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/820-17-0x0000000074AA0000-0x0000000075051000-memory.dmp
memory/820-18-0x0000000000CD0000-0x0000000000CE0000-memory.dmp
memory/820-19-0x0000000074AA0000-0x0000000075051000-memory.dmp