njrat | 3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9

General

Target

3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe
Size

122KB
MD5

a020d9fce41bfcbe232c6bcfd9b660fb
SHA1

f74b87fd8ab7f00b7eff92f165680c20dcbab7c0
SHA256

3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9
SHA512

260cda6e474206091436fcaf38759dddc8d8bcc389e33d2264ce770ce5bd2abf8261800fd071b63b2adb1d23c5579f6f591d5900cd517bc382b0019a72b62819
SSDEEP

3072:EN5KHLqKWqxOaxGM4RDvn1vnTSQW7mrYaeZMFiC7vvf2Q9WlfPmiBq4eHGjTqyI4:C5KHLqAUaxGM4RDvn1VWSrYaeZMFiC7U

Score

10^/10

njrat defense_evasion discovery 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

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4548	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b5c99258d66f4edbad7c0df6270b5949.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b5c99258d66f4edbad7c0df6270b5949.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
1080	server.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b5c99258d66f4edbad7c0df6270b5949 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\b5c99258d66f4edbad7c0df6270b5949 = "\"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

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.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

description	pid	Process
Token: SeDebugPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe
Token: 33	1080	server.exe
Token: SeIncBasePriorityPrivilege	1080	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3564 wrote to memory of 1080	3564	3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe	88
PID 3564 wrote to memory of 1080	3564	3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe	88
PID 3564 wrote to memory of 1080	3564	3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe	88
PID 1080 wrote to memory of 4548	1080	server.exe	97
PID 1080 wrote to memory of 4548	1080	server.exe	97
PID 1080 wrote to memory of 4548	1080	server.exe	97

C:\Users\Admin\AppData\Local\Temp\3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe
"C:\Users\Admin\AppData\Local\Temp\3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3564
- 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:1080
- - 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:4548

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
122KB

MD5
a020d9fce41bfcbe232c6bcfd9b660fb

SHA1
f74b87fd8ab7f00b7eff92f165680c20dcbab7c0

SHA256
3773de7f2b7a701ffb9629cb96627f595740ebf24c1d47583000043fc68d4dc9

SHA512
260cda6e474206091436fcaf38759dddc8d8bcc389e33d2264ce770ce5bd2abf8261800fd071b63b2adb1d23c5579f6f591d5900cd517bc382b0019a72b62819

Download Submit
memory/1080-16-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download
memory/1080-17-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download
memory/1080-19-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download
memory/3564-0-0x0000000074EF2000-0x0000000074EF3000-memory.dmp

Filesize
4KB

Download
memory/3564-1-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download
memory/3564-2-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download
memory/3564-15-0x0000000074EF0000-0x00000000754A1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads