njrat | 863a54fcc0edc46e52df772d40698c5645029ea6031022ea8e19a686245d49c6

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
15-12-2024 05:42

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General

Target

NewClient.exe
Size

164KB
MD5

865bf3d2eeb62c50359ede787f510100
SHA1

462a1745c2da3d1ae7688a3fda60e441debede32
SHA256

863a54fcc0edc46e52df772d40698c5645029ea6031022ea8e19a686245d49c6
SHA512

6d37e88b08fbff52db3db3b19627f49cdad54082c9b34ad8decb90857ab8318b14764a3ee5e6a4dd96f4e272daf8ebfb79139bc3332d8842368431383932d862
SSDEEP

3072:8w11/wTvYZDDNF90qhRb70L8czxE2YY6q9bLzl6fHMEBuo:8wZD9b70wczSTYh9bAlD

Score

10^/10

njrat discovery persistence trojan

Malware Config

Signatures

Njrat family
njrat
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupHelper.exe	StartupHelper.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\StartupHelper.exe	StartupHelper.exe

Executes dropped EXE 4 IoCs

pid	Process
1600	StartupHelper.exe
2844	StartupHelper.exe
764	StartupHelper.exe
1288	StartupHelper.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\StartupHelper.exe = "\"C:\\Windows\\StartupHelper.exe\" .."	StartupHelper.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\StartupHelper.exe = "\"C:\\Windows\\StartupHelper.exe\" .."	StartupHelper.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\StartupHelper.exe	NewClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 15 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	StartupHelper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	StartupHelper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	StartupHelper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	StartupHelper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NewClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2820	schtasks.exe
1676	schtasks.exe
1548	schtasks.exe
2404	schtasks.exe
1864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe
Token: 33	1600	StartupHelper.exe
Token: SeIncBasePriorityPrivilege	1600	StartupHelper.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 1452	2900	NewClient.exe	30
PID 2900 wrote to memory of 1452	2900	NewClient.exe	30
PID 2900 wrote to memory of 1452	2900	NewClient.exe	30
PID 2900 wrote to memory of 1452	2900	NewClient.exe	30
PID 2900 wrote to memory of 2820	2900	NewClient.exe	32
PID 2900 wrote to memory of 2820	2900	NewClient.exe	32
PID 2900 wrote to memory of 2820	2900	NewClient.exe	32
PID 2900 wrote to memory of 2820	2900	NewClient.exe	32
PID 2900 wrote to memory of 1600	2900	NewClient.exe	34
PID 2900 wrote to memory of 1600	2900	NewClient.exe	34
PID 2900 wrote to memory of 1600	2900	NewClient.exe	34
PID 2900 wrote to memory of 1600	2900	NewClient.exe	34
PID 1600 wrote to memory of 2704	1600	StartupHelper.exe	35
PID 1600 wrote to memory of 2704	1600	StartupHelper.exe	35
PID 1600 wrote to memory of 2704	1600	StartupHelper.exe	35
PID 1600 wrote to memory of 2704	1600	StartupHelper.exe	35
PID 1600 wrote to memory of 1676	1600	StartupHelper.exe	36
PID 1600 wrote to memory of 1676	1600	StartupHelper.exe	36
PID 1600 wrote to memory of 1676	1600	StartupHelper.exe	36
PID 1600 wrote to memory of 1676	1600	StartupHelper.exe	36
PID 2708 wrote to memory of 2844	2708	taskeng.exe	40
PID 2708 wrote to memory of 2844	2708	taskeng.exe	40
PID 2708 wrote to memory of 2844	2708	taskeng.exe	40
PID 2708 wrote to memory of 2844	2708	taskeng.exe	40
PID 2844 wrote to memory of 2728	2844	StartupHelper.exe	41
PID 2844 wrote to memory of 2728	2844	StartupHelper.exe	41
PID 2844 wrote to memory of 2728	2844	StartupHelper.exe	41
PID 2844 wrote to memory of 2728	2844	StartupHelper.exe	41
PID 2844 wrote to memory of 1548	2844	StartupHelper.exe	43
PID 2844 wrote to memory of 1548	2844	StartupHelper.exe	43
PID 2844 wrote to memory of 1548	2844	StartupHelper.exe	43
PID 2844 wrote to memory of 1548	2844	StartupHelper.exe	43
PID 2708 wrote to memory of 764	2708	taskeng.exe	46
PID 2708 wrote to memory of 764	2708	taskeng.exe	46
PID 2708 wrote to memory of 764	2708	taskeng.exe	46
PID 2708 wrote to memory of 764	2708	taskeng.exe	46
PID 764 wrote to memory of 2384	764	StartupHelper.exe	47
PID 764 wrote to memory of 2384	764	StartupHelper.exe	47
PID 764 wrote to memory of 2384	764	StartupHelper.exe	47
PID 764 wrote to memory of 2384	764	StartupHelper.exe	47
PID 764 wrote to memory of 2404	764	StartupHelper.exe	49
PID 764 wrote to memory of 2404	764	StartupHelper.exe	49
PID 764 wrote to memory of 2404	764	StartupHelper.exe	49
PID 764 wrote to memory of 2404	764	StartupHelper.exe	49
PID 2708 wrote to memory of 1288	2708	taskeng.exe	51
PID 2708 wrote to memory of 1288	2708	taskeng.exe	51
PID 2708 wrote to memory of 1288	2708	taskeng.exe	51
PID 2708 wrote to memory of 1288	2708	taskeng.exe	51
PID 1288 wrote to memory of 888	1288	StartupHelper.exe	52
PID 1288 wrote to memory of 888	1288	StartupHelper.exe	52
PID 1288 wrote to memory of 888	1288	StartupHelper.exe	52
PID 1288 wrote to memory of 888	1288	StartupHelper.exe	52
PID 1288 wrote to memory of 1864	1288	StartupHelper.exe	54
PID 1288 wrote to memory of 1864	1288	StartupHelper.exe	54
PID 1288 wrote to memory of 1864	1288	StartupHelper.exe	54
PID 1288 wrote to memory of 1864	1288	StartupHelper.exe	54

C:\Users\Admin\AppData\Local\Temp\NewClient.exe
"C:\Users\Admin\AppData\Local\Temp\NewClient.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /Delete /tn NYAN /F
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1452
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /tn NYAN /tr "C:\Users\Admin\AppData\Local\Temp\NewClient.exe" /sc minute /mo 1
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2820
- C:\Windows\StartupHelper.exe
  "C:\Windows\StartupHelper.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Delete /tn NYAN /F
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2704
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn NYAN /tr "C:\Windows\StartupHelper.exe" /sc minute /mo 1
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1676

C:\Windows\system32\taskeng.exe
taskeng.exe {69E89E29-BD8E-4AF5-85EE-CB3E490141C5} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Windows\StartupHelper.exe
  C:\Windows\StartupHelper.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Delete /tn NYAN /F
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2728
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn NYAN /tr "C:\Windows\StartupHelper.exe" /sc minute /mo 1
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1548
- C:\Windows\StartupHelper.exe
  C:\Windows\StartupHelper.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:764
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Delete /tn NYAN /F
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2384
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn NYAN /tr "C:\Windows\StartupHelper.exe" /sc minute /mo 1
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2404
- C:\Windows\StartupHelper.exe
  C:\Windows\StartupHelper.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /Delete /tn NYAN /F
    3⤵
    - System Location Discovery: System Language Discovery
    PID:888
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn NYAN /tr "C:\Windows\StartupHelper.exe" /sc minute /mo 1
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\StartupHelper.exe

Filesize
164KB

MD5
865bf3d2eeb62c50359ede787f510100

SHA1
462a1745c2da3d1ae7688a3fda60e441debede32

SHA256
863a54fcc0edc46e52df772d40698c5645029ea6031022ea8e19a686245d49c6

SHA512
6d37e88b08fbff52db3db3b19627f49cdad54082c9b34ad8decb90857ab8318b14764a3ee5e6a4dd96f4e272daf8ebfb79139bc3332d8842368431383932d862

Download Submit
memory/1600-10-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/1600-12-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/1600-15-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2900-0-0x0000000074C61000-0x0000000074C62000-memory.dmp

Filesize
4KB

Download
memory/2900-1-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2900-2-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2900-11-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2900-9-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads