njrat | 7559e6ca8b77400f88bf4e67208a1c32570a670068eccae9e3d226cc5471bd47

Resubmissions

26/09/2024, 06:42

240926-hgnp9ashkk10

25/09/2024, 16:40

240925-t6kwfayfph10

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25/09/2024, 16:40

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General

Target
bazaar.2020.02/Backdoor.MSIL.Agent.exe
Size 89KB
Sample240925-t6kwfayfph
SHA256 72fd107044ae159a7a80813fe902a132f12eedd01c63fd9e506cf05e088e7491
MD5 f54eea2b9a7c0259b87a5303a526d818
SHA1 641fcc96b0e288f7c5b1d0b94d6be1be2939e38e
SHA512 36d1fb8553f454b1edbd719d4805e3d120b243960fb82ff640e52e3d3c9710a8761128079f981da011ad931c1117c0d7317f051bd4fd71a5bad93b7862dafde5
SSDEEP 384:W8aZYC9twBNdcvFaly2H0dbJo6HghcASEJqc/ZmRvR6JZlbw8hqIusZzZVPe+8tp:AY+sNKqNHnSdRpcnu+REgTK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

njrat discovery evasion persistence privilege_escalation trojan

Malware Config

Signatures

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
4384	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e4c7f2e5b82fac0d624ab661f39b28fa.exe	Backdoor.MSIL.Agent.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e4c7f2e5b82fac0d624ab661f39b28fa.exe	Backdoor.MSIL.Agent.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-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e4c7f2e5b82fac0d624ab661f39b28fa = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\bazaar.2020.02\\Backdoor.MSIL.Agent.exe\" .."	Backdoor.MSIL.Agent.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e4c7f2e5b82fac0d624ab661f39b28fa = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\bazaar.2020.02\\Backdoor.MSIL.Agent.exe\" .."	Backdoor.MSIL.Agent.exe

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 2 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	Backdoor.MSIL.Agent.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe
Token: 33	2532	Backdoor.MSIL.Agent.exe
Token: SeIncBasePriorityPrivilege	2532	Backdoor.MSIL.Agent.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 4384	2532	Backdoor.MSIL.Agent.exe	86
PID 2532 wrote to memory of 4384	2532	Backdoor.MSIL.Agent.exe	86
PID 2532 wrote to memory of 4384	2532	Backdoor.MSIL.Agent.exe	86

C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.MSIL.Agent.exe
"C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.MSIL.Agent.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.MSIL.Agent.exe" "Backdoor.MSIL.Agent.exe" ENABLE
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  - System Location Discovery: System Language Discovery
  PID:4384