Analysis Overview
SHA256
f4331069d66380c5e6d33ced21ca3e76677d2e364e4021e1612cbc48cefc4398
Threat Level: Known bad
The file New Client.exe was found to be: Known bad.
Malicious Activity Summary
Njrat family
Drops startup file
Executes dropped EXE
Adds Run key to start application
Drops file in Windows directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Kills process with taskkill
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-27 20:19
Signatures
Njrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-27 20:19
Reported
2024-04-27 20:22
Platform
win11-20240419-en
Max time kernel
150s
Max time network
152s
Command Line
Signatures
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client.exe | C:\Windows\Client.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini | C:\Users\Admin\AppData\Local\Temp\New Client.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini | C:\Windows\Client.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client.exe | C:\Windows\Client.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Client.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\Client.exe = "\"C:\\Windows\\Client.exe\" .." | C:\Windows\Client.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Client.exe = "\"C:\\Windows\\Client.exe\" .." | C:\Windows\Client.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\Client.exe | C:\Users\Admin\AppData\Local\Temp\New Client.exe | N/A |
| File opened for modification | C:\Windows\Client.exe | C:\Windows\Client.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\New Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\New Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\TASKKILL.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\New Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
| Token: 33 | N/A | C:\Windows\Client.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\Client.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\New Client.exe
"C:\Users\Admin\AppData\Local\Temp\New Client.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYANP /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYANP /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 5
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM wscript.exe
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM cmd.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYAN /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYAN /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 1
C:\Windows\Client.exe
"C:\Windows\Client.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYANP /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYANP /tr "C:\Windows\Client.exe" /sc minute /mo 5
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM wscript.exe
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM cmd.exe
C:\Users\Admin\AppData\Local\Temp\New Client.exe
"C:\Users\Admin\AppData\Local\Temp\New Client.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYANP /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYANP /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 5
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM wscript.exe
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM cmd.exe
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYAN /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYAN /tr "C:\Windows\Client.exe" /sc minute /mo 1
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYAN /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYAN /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 1
C:\Users\Admin\AppData\Local\Temp\New Client.exe
"C:\Users\Admin\AppData\Local\Temp\New Client.exe"
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYANP /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYANP /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 5
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM wscript.exe
C:\Windows\SysWOW64\TASKKILL.exe
TASKKILL /F /IM cmd.exe
C:\Windows\SysWOW64\schtasks.exe
schtasks /Delete /tn NYAN /F
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /tn NYAN /tr "C:\Users\Admin\AppData\Local\Temp\New Client.exe" /sc minute /mo 1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| GB | 92.123.128.149:443 | tcp | |
| GB | 92.123.128.149:443 | tcp | |
| GB | 92.123.128.149:443 | tcp | |
| US | 8.8.8.8:53 | browser.pipe.aria.microsoft.com | udp |
| GB | 92.123.128.149:443 | tcp | |
| GB | 92.123.128.150:443 | tcp | |
| GB | 92.123.128.150:443 | tcp | |
| GB | 92.123.128.150:443 | tcp | |
| GB | 92.123.128.150:443 | tcp | |
| GB | 92.123.128.157:443 | tcp | |
| GB | 92.123.128.157:443 | tcp | |
| US | 8.8.8.8:53 | browser.pipe.aria.microsoft.com | udp |
| GB | 92.123.128.157:443 | tcp | |
| GB | 92.123.128.157:443 | tcp | |
| GB | 92.123.128.157:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| GB | 92.123.128.147:443 | tcp | |
| US | 8.8.8.8:53 | green-morrison.gl.at.ply.gg | udp |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.154:443 | tcp | |
| US | 8.8.8.8:53 | browser.pipe.aria.microsoft.com | udp |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.154:443 | tcp | |
| GB | 92.123.128.155:443 | tcp | |
| GB | 92.123.128.155:443 | tcp | |
| GB | 92.123.128.155:443 | tcp | |
| US | 8.8.8.8:53 | green-morrison.gl.at.ply.gg | udp |
| GB | 92.123.128.152:443 | tcp | |
| GB | 92.123.128.152:443 | tcp | |
| GB | 92.123.128.152:443 | tcp | |
| GB | 92.123.128.146:443 | tcp | |
| GB | 92.123.128.146:443 | tcp | |
| GB | 92.123.128.156:443 | tcp | |
| US | 8.8.8.8:53 | green-morrison.gl.at.ply.gg | udp |
| US | 8.8.8.8:53 | browser.pipe.aria.microsoft.com | udp |
| GB | 92.123.128.156:443 | tcp | |
| US | 8.8.8.8:53 | green-morrison.gl.at.ply.gg | udp |
| US | 8.8.8.8:53 | green-morrison.gl.at.ply.gg | udp |
Files
memory/1940-0-0x0000000074940000-0x0000000074EF1000-memory.dmp
memory/1940-1-0x0000000074940000-0x0000000074EF1000-memory.dmp
memory/1940-2-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-6-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-5-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-4-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-3-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-7-0x0000000074940000-0x0000000074EF1000-memory.dmp
memory/1940-8-0x0000000074940000-0x0000000074EF1000-memory.dmp
memory/1940-9-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-10-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-13-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-12-0x0000000001A70000-0x0000000001A80000-memory.dmp
memory/1940-11-0x0000000001A70000-0x0000000001A80000-memory.dmp
C:\Windows\Client.exe
| MD5 | bb469e37072ae0d4450e826e0548489e |
| SHA1 | 3d692ff13fa4145a1b5935ff2cf234aab2e5b950 |
| SHA256 | f4331069d66380c5e6d33ced21ca3e76677d2e364e4021e1612cbc48cefc4398 |
| SHA512 | b16502767a8ac273d4f0dac743e5382b1bab328983904eab664ed1ac8bb8627251ffbb8603b1e1c8cdf208dbf39d6e3e9074b9e485a7d2af4d6ecde01d0da0d7 |
memory/1940-23-0x0000000074940000-0x0000000074EF1000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\New Client.exe.log
| MD5 | b4d14ec3884c4815553e89737aa0f1ff |
| SHA1 | c3b3039da0e6d6588d5695880d84111d7973e141 |
| SHA256 | d06b129aac3de36095a00beb80a5eb349cb554fd2cfaf49083a30ec174b16a7d |
| SHA512 | 3a91a512a25dce176a3b8565a901a82c5ab25931c176406cf295dc48da30934c553104edd3b856bcf1ef4249152ff1b5860b93e462dcf7608aa793af316e130f |