njrat | 3314999529183eb9c48b506a9af61a8dd1b8c3e7bae6f7676af5a22ea4630d93

General

Target

BackSide.scr
Size

1.2MB
MD5

fc0eda848858a83000947398e4fc5988
SHA1

6a1ef4d79282cf7415e031a1f9597f2f527fb351
SHA256

b3d5d4f086b549051ef58260a81a2b4a8a53423ba17fae0ebc1d5be5fa800d12
SHA512

ffd6eff982feb4848d4b8cd54ce8527eaef415e0dcc780ba2d768be9c5143396e4e9fd7e3ba608a15d24f7d0aa9f11d267d330910c8b314f6eae88c173dddc15
SSDEEP

24576:hs2m37uALHllEhLl9jEfoE+q4B0McK4KrD35N7dfGs:hs2m37uAzAhLlVEfvCCuLAs

Score

10^/10

njrat jiolliapa defense_evasion discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

JIoLLIaPa

C2

193.218.141.160:1100

Mutex

25b7ccb5b0dc716d27e2168346698c0b

Attributes

reg_key
25b7ccb5b0dc716d27e2168346698c0b
splitter
|'|'|

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
3896	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	BackSide.scr
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Screenshot.scr

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\25b7ccb5b0dc716d27e2168346698c0b.exe	Windowslog.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\25b7ccb5b0dc716d27e2168346698c0b.exe	Windowslog.exe

Executes dropped EXE 2 IoCs

pid	Process
3172	Screenshot.scr
1988	Windowslog.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\25b7ccb5b0dc716d27e2168346698c0b = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windowslog.exe\" .."	Windowslog.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\25b7ccb5b0dc716d27e2168346698c0b = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windowslog.exe\" .."	Windowslog.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004
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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windowslog.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BackSide.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Screenshot.scr

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe
1988	Windowslog.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1988	Windowslog.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 3172	2808	BackSide.scr	84
PID 2808 wrote to memory of 3172	2808	BackSide.scr	84
PID 2808 wrote to memory of 3172	2808	BackSide.scr	84
PID 2808 wrote to memory of 4552	2808	BackSide.scr	85
PID 2808 wrote to memory of 4552	2808	BackSide.scr	85
PID 2808 wrote to memory of 4552	2808	BackSide.scr	85
PID 3172 wrote to memory of 1988	3172	Screenshot.scr	87
PID 3172 wrote to memory of 1988	3172	Screenshot.scr	87
PID 3172 wrote to memory of 1988	3172	Screenshot.scr	87
PID 1988 wrote to memory of 3896	1988	Windowslog.exe	88
PID 1988 wrote to memory of 3896	1988	Windowslog.exe	88
PID 1988 wrote to memory of 3896	1988	Windowslog.exe	88

C:\Users\Admin\AppData\Local\Temp\BackSide.scr
"C:\Users\Admin\AppData\Local\Temp\BackSide.scr" /S
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Local\Temp\Screenshot.scr
  "C:\Users\Admin\AppData\Local\Temp\Screenshot.scr" /S
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3172
- - C:\Users\Admin\AppData\Roaming\Windowslog.exe
    "C:\Users\Admin\AppData\Roaming\Windowslog.exe"
    3⤵
    - Drops startup file
    - 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:1988
  - - C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Windowslog.exe" "Windowslog.exe" ENABLE
      4⤵
      Modifies Windows Firewall
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      PID:3896
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del "C:\Users\Admin\AppData\Local\Temp\BackSide.scr" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4552

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

1

T1562.004

Indicator Removal

1

T1070

File Deletion

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\Screenshot.scr

Filesize
390KB

MD5
f242e86161084bd0f36570aa2668e64c

SHA1
7b57dc7166b42069cac83d4bd36a3153806c938d

SHA256
f6ecd614bf4b9a1559af590275f5daeb7733451b654d1ed2f0ef92a8a1a95396

SHA512
bbc9008132c1e44b98c036dc24be3a230076fd5df6404750b3c6e04f44b66c847857fdbaeb6056bf3051f03cb932c7b47a8431bf69467a4d0dd1d63166c35e10

Download Submit
memory/1988-21-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/1988-22-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/1988-24-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/1988-25-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/3172-8-0x0000000073322000-0x0000000073323000-memory.dmp

Filesize
4KB

Download
memory/3172-9-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/3172-10-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download
memory/3172-20-0x0000000073320000-0x00000000738D1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads