njrat | fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223

General

Target

fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe
Size

23KB
MD5

744dc6cc8acce92d2b7f23244a249b40
SHA1

da8693842630dab540d1c0b32b1bea7e054d77df
SHA256

fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223
SHA512

12afc14b38aa01d573a081b9d2b9d1cfb094da5461b2dc45ae93a430c7dfa88b3bc3f44cffe5b975cf3043386f264c96215921cdfb266117185d1741f9548e3b
SSDEEP

384:cslUlEvOEJ8xWwYJOMiOBZEdj1567gtwi5HhbQmRvR6JZlbw8hqIusZzZuN6:VeEvwIlLMRpcnuB6

Score

10^/10

njrat discovery evasion persistence privilege_escalation trojan

Malware Config

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

Processes:

netsh.exe

pid	Process
2852	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe

Drops startup file 2 IoCs

Processes:

server.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e3c9dc0133333258fa0ebe7ab4bdc72d.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e3c9dc0133333258fa0ebe7ab4bdc72d.exe	server.exe

Executes dropped EXE 1 IoCs

Processes:

server.exe

pid	Process
1408	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

server.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e3c9dc0133333258fa0ebe7ab4bdc72d = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e3c9dc0133333258fa0ebe7ab4bdc72d = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe

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

Processes:

netsh.exe

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 3 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

Processes:

fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exeserver.exenetsh.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of AdjustPrivilegeToken 27 IoCs

Processes:

server.exe

description	pid	Process
Token: SeDebugPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe
Token: 33	1408	server.exe
Token: SeIncBasePriorityPrivilege	1408	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exeserver.exe

description	pid	Process	procid_target
PID 4412 wrote to memory of 1408	4412	fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe	84
PID 4412 wrote to memory of 1408	4412	fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe	84
PID 4412 wrote to memory of 1408	4412	fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe	84
PID 1408 wrote to memory of 2852	1408	server.exe	86
PID 1408 wrote to memory of 2852	1408	server.exe	86
PID 1408 wrote to memory of 2852	1408	server.exe	86

C:\Users\Admin\AppData\Local\Temp\fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe
"C:\Users\Admin\AppData\Local\Temp\fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.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:1408
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\server.exe

Filesize
23KB

MD5
744dc6cc8acce92d2b7f23244a249b40

SHA1
da8693842630dab540d1c0b32b1bea7e054d77df

SHA256
fc7d8c3b8b3627a6e5a660d3b572b676e6e0470a9935d793c813fcb78e290223

SHA512
12afc14b38aa01d573a081b9d2b9d1cfb094da5461b2dc45ae93a430c7dfa88b3bc3f44cffe5b975cf3043386f264c96215921cdfb266117185d1741f9548e3b

Download Submit
memory/1408-15-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/1408-16-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/1408-18-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/4412-0-0x0000000074FB2000-0x0000000074FB3000-memory.dmp

Filesize
4KB

Download
memory/4412-1-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/4412-2-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/4412-12-0x0000000074FB2000-0x0000000074FB3000-memory.dmp

Filesize
4KB

Download
memory/4412-14-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download
memory/4412-13-0x0000000074FB0000-0x0000000075561000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads