njrat | 9b53d3c635fb01cb79c384b5add1ce0bddf2fb7ec27c52cbe15285184f202564

Analysis

max time kernel
155s
max time network
174s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
05/01/2024, 00:15

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General

Target

4247c4d09cc14d68a37d07e8983b5689.exe
Size

114KB
MD5

4247c4d09cc14d68a37d07e8983b5689
SHA1

56383c1267482b38d33bf8dcef1ee31dbac5c07a
SHA256

9b53d3c635fb01cb79c384b5add1ce0bddf2fb7ec27c52cbe15285184f202564
SHA512

e7532e4cda43a585428cedf3223ad61cd35e4aea28c3de46c9367f4dc909fda3d7c89331d7b591c217f833a78605f8a0620101bb13ff2169408d283603b3dfb3
SSDEEP

1536:7q73RtOhd71nbgrEFpsCofqJvcpMJL8eIcLGwZSujuSwKjx6fD7gurnrs8:C3Rt8d7pgQ/sCoyV9JzIOGOE31rrb

Score

10^/10

njrat 2020 evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

2020

grandmark-pg.kro.kr:8080

Mutex

c766e8a0c9537c519acbf9fdc3142a0b

Attributes

reg_key
c766e8a0c9537c519acbf9fdc3142a0b
splitter
|'|'|

Signatures

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

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2728	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c766e8a0c9537c519acbf9fdc3142a0b.exe	4247c4d09cc14d68a37d07e8983b5689.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\c766e8a0c9537c519acbf9fdc3142a0b.exe	4247c4d09cc14d68a37d07e8983b5689.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-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\c766e8a0c9537c519acbf9fdc3142a0b = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\4247c4d09cc14d68a37d07e8983b5689.exe\" .."	4247c4d09cc14d68a37d07e8983b5689.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\c766e8a0c9537c519acbf9fdc3142a0b = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\4247c4d09cc14d68a37d07e8983b5689.exe\" .."	4247c4d09cc14d68a37d07e8983b5689.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: 33	2284	4247c4d09cc14d68a37d07e8983b5689.exe
Token: SeIncBasePriorityPrivilege	2284	4247c4d09cc14d68a37d07e8983b5689.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2728	2284	4247c4d09cc14d68a37d07e8983b5689.exe	28
PID 2284 wrote to memory of 2728	2284	4247c4d09cc14d68a37d07e8983b5689.exe	28
PID 2284 wrote to memory of 2728	2284	4247c4d09cc14d68a37d07e8983b5689.exe	28
PID 2284 wrote to memory of 2728	2284	4247c4d09cc14d68a37d07e8983b5689.exe	28

C:\Users\Admin\AppData\Local\Temp\4247c4d09cc14d68a37d07e8983b5689.exe
"C:\Users\Admin\AppData\Local\Temp\4247c4d09cc14d68a37d07e8983b5689.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\4247c4d09cc14d68a37d07e8983b5689.exe" "4247c4d09cc14d68a37d07e8983b5689.exe" ENABLE
  2⤵
  - Modifies Windows Firewall
  PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2284-1-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2284-0-0x0000000001100000-0x0000000001124000-memory.dmp

Filesize
144KB

Download
memory/2284-2-0x0000000004E60000-0x0000000004EA0000-memory.dmp

Filesize
256KB

Download
memory/2284-3-0x0000000000240000-0x000000000024C000-memory.dmp

Filesize
48KB

Download
memory/2284-5-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2284-6-0x0000000004E60000-0x0000000004EA0000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads