njrat | 74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08df

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-01-2025 04:25

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General

Target

74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
Size

1.2MB
MD5

db4d31386a48d83ba9575221ee214b40
SHA1

7af7fb498844643c4f77ebf4b3fbcf95b3cd0e43
SHA256

74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08df
SHA512

6385b2bc8f62b3ad15bd8305459f2d9ddda58225d1bfa4f095db7590635fcec3e34841ef4790cf2a68e4aaf3e14da6a67afe6eb4ce3ac93d6542240e69de1f12
SSDEEP

24576:eAHnh+eWsN3skA4RV1Hom2KXMmHaW7aWvCaFg5a7PCmWX95P:Jh+ZkldoPK8YaW7CaZ7IHP

Score

10^/10

njrat redlanhopto discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

redlanhopto

redlan.hopto.org:5553

Mutex

d25d360449d7bab3069e1b77b3a914a3

Attributes

reg_key
d25d360449d7bab3069e1b77b3a914a3
splitter
|'|'|

Signatures

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

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2808	netsh.exe

Executes dropped EXE 1 IoCs

pid	Process
2888	data.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000c00000001227e-14.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1484 set thread context of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 2888 set thread context of 1976	2888	data.exe	40

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	data.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2668	schtasks.exe
2080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
2888	data.exe
2888	data.exe

Suspicious use of AdjustPrivilegeToken 21 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe
Token: 33	2432	RegAsm.exe
Token: SeIncBasePriorityPrivilege	2432	RegAsm.exe

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
2888	data.exe
2888	data.exe
2888	data.exe

Suspicious use of SendNotifyMessage 6 IoCs

pid	Process
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
2888	data.exe
2888	data.exe
2888	data.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 1484 wrote to memory of 2432	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	31
PID 2432 wrote to memory of 2808	2432	RegAsm.exe	32
PID 2432 wrote to memory of 2808	2432	RegAsm.exe	32
PID 2432 wrote to memory of 2808	2432	RegAsm.exe	32
PID 2432 wrote to memory of 2808	2432	RegAsm.exe	32
PID 1484 wrote to memory of 2668	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	35
PID 1484 wrote to memory of 2668	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	35
PID 1484 wrote to memory of 2668	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	35
PID 1484 wrote to memory of 2668	1484	74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe	35
PID 2032 wrote to memory of 2888	2032	taskeng.exe	38
PID 2032 wrote to memory of 2888	2032	taskeng.exe	38
PID 2032 wrote to memory of 2888	2032	taskeng.exe	38
PID 2032 wrote to memory of 2888	2032	taskeng.exe	38
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 1976	2888	data.exe	40
PID 2888 wrote to memory of 2080	2888	data.exe	41
PID 2888 wrote to memory of 2080	2888	data.exe	41
PID 2888 wrote to memory of 2080	2888	data.exe	41
PID 2888 wrote to memory of 2080	2888	data.exe	41

C:\Users\Admin\AppData\Local\Temp\74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe
"C:\Users\Admin\AppData\Local\Temp\74bf136a7fbe0ab21dfdb2bd986ea1c4bba6e683de6b8d31f93f0ea1e2da08dfN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2432
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe" "RegAsm.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2808
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn igfxHK /tr "C:\Users\Admin\AppData\Roaming\chkdsk\data.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2668

C:\Windows\system32\taskeng.exe
taskeng.exe {0C7F62E6-C550-4C7E-B832-1BF7C93318CF} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
  C:\Users\Admin\AppData\Roaming\chkdsk\data.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1976
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\SysWOW64\schtasks.exe" /create /tn igfxHK /tr "C:\Users\Admin\AppData\Roaming\chkdsk\data.exe" /sc minute /mo 1 /F
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

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:\Users\Admin\AppData\Roaming\chkdsk\data.exe

Filesize
1.2MB

MD5
fa101fc6fe1306e2a86137f5ab964b9a

SHA1
7e2c31027449c9eeeef55087549b46d6a823476c

SHA256
625eea3cdb913f0d636ab49f5c3acae3c79a6d51d6dd41d9565699ea08bc2286

SHA512
1081d3bce1c9093b8162abf3e99fda3f7f9e312714ede79e765a3ee73e181405bb7c43e160a608be2666fcb09066c51e35fc870dbd32ee2aecf4b287558fef40

Download Submit
memory/1484-0-0x0000000000120000-0x0000000000121000-memory.dmp

Filesize
4KB

Download
memory/1976-18-0x0000000000090000-0x000000000009C000-memory.dmp

Filesize
48KB

Download
memory/1976-25-0x0000000000090000-0x000000000009C000-memory.dmp

Filesize
48KB

Download
memory/1976-24-0x0000000000090000-0x000000000009C000-memory.dmp

Filesize
48KB

Download
memory/2432-1-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2432-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2432-2-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2432-9-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2432-8-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2432-10-0x0000000074802000-0x0000000074804000-memory.dmp

Filesize
8KB

Download
memory/2432-11-0x0000000074802000-0x0000000074804000-memory.dmp

Filesize
8KB

Download