njrat | f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06

General

Target

f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe
Size

300KB
MD5

ff59ce384fc7d8094e316e04c1079c44
SHA1

3d2546177ea8286debac91588cbc413d9e77c90b
SHA256

f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06
SHA512

b2d9e10bf9c39c3fb1e8e280f4d27698a1633446801e72bd28ab10eafa733e05731e1782ab22a7c96a9512b168b48e38054f97d9429d1e9033ed2c8fa3080614
SSDEEP

6144:iZjk05fpjtMoxMCWsaH/LSkVsNCVjgYgDa9:iZjVxxMo6CWrfekK0qYgD

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

pid	Process
4744	netsh.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Tempserver.exe

Executes dropped EXE 2 IoCs

pid	Process
2016	Tempserver.exe
1800	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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\bead739c11b6815884fb1a13a48ced96 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Server.exe\" .."	Server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bead739c11b6815884fb1a13a48ced96 = "\"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 4 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	f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Tempserver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe
1800	Server.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	Server.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1308 wrote to memory of 2016	1308	f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe	88
PID 1308 wrote to memory of 2016	1308	f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe	88
PID 1308 wrote to memory of 2016	1308	f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe	88
PID 2016 wrote to memory of 1800	2016	Tempserver.exe	89
PID 2016 wrote to memory of 1800	2016	Tempserver.exe	89
PID 2016 wrote to memory of 1800	2016	Tempserver.exe	89
PID 1800 wrote to memory of 4744	1800	Server.exe	90
PID 1800 wrote to memory of 4744	1800	Server.exe	90
PID 1800 wrote to memory of 4744	1800	Server.exe	90

C:\Users\Admin\AppData\Local\Temp\f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe
"C:\Users\Admin\AppData\Local\Temp\f6f57baa3bfc37642a0e9804787d5744b8998846efee6f0a3e96d07c9c31ee06.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1308
- C:\Users\Admin\AppData\Local\Tempserver.exe
  "C:\Users\Admin\AppData\Local\Tempserver.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE
      4⤵
      Modifies Windows Firewall
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      PID:4744

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\Tempserver.exe

Filesize
29KB

MD5
095df56f946840f7084100baa6213603

SHA1
9b499c7b0bdf7c45e16b6e659aee32e1a3027e58

SHA256
721c1e9b05f4c80d623e0200edac67176120dd58f46fdcebe125cb10cb06953d

SHA512
72b73e42567572d8e9acc0cbd1bbf9c0dd23bc15eb0fd815868b8255c381681cbb9f75b22f5c23e989956d910eb87d3f1665fb7cd6ff177ae164b6e4ea20b768

Download Submit
memory/1308-7-0x0000000005710000-0x000000000571A000-memory.dmp

Filesize
40KB

Download
memory/1308-3-0x00000000055F0000-0x00000000055F6000-memory.dmp

Filesize
24KB

Download
memory/1308-1-0x0000000000CA0000-0x0000000000CF2000-memory.dmp

Filesize
328KB

Download
memory/1308-19-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1308-5-0x0000000005DB0000-0x0000000006354000-memory.dmp

Filesize
5.6MB

Download
memory/1308-6-0x00000000058A0000-0x0000000005932000-memory.dmp

Filesize
584KB

Download
memory/1308-8-0x0000000005A30000-0x0000000005A86000-memory.dmp

Filesize
344KB

Download
memory/1308-0-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

Filesize
4KB

Download
memory/1308-9-0x0000000005BC0000-0x0000000005BCC000-memory.dmp

Filesize
48KB

Download
memory/1308-2-0x0000000005760000-0x00000000057FC000-memory.dmp

Filesize
624KB

Download
memory/1308-4-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1800-33-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download
memory/1800-34-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download
memory/1800-35-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download
memory/2016-20-0x0000000070012000-0x0000000070013000-memory.dmp

Filesize
4KB

Download
memory/2016-21-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download
memory/2016-22-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download
memory/2016-32-0x0000000070010000-0x00000000705C1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads