njrat | 3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8

General

Target

3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe
Size

23KB
MD5

5b72c6044d819ec5431ccc0736fd9ed2
SHA1

80cf96c5f8b66de9e9f21d47f0f18e68c3b9f74a
SHA256

3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8
SHA512

cde2c1c13e3a136f7ffa39d1731ea336ef0a2ab074764aadbeb6eacc4350b8169e8179d95bc90e94219c1e7c4ad2658716548a2486b61a83f4fab228c8aa7238
SSDEEP

384:y8aY1ia0N/IH+WUiWiLcXyUTly2Rc87po6ngB8W+tqlf5mRvR6JZlbw8hqIusZz5:31Re/E+WUiW6ci6NR7tZRpcnuWp

Score

10^/10

njrat yosef discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

yOSEF

C2

z24545451383mcvodn.hopto.org:1177

Mutex

43e69094d76b8f4516f8f345104212b2

Attributes

reg_key
43e69094d76b8f4516f8f345104212b2
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
2752	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\43e69094d76b8f4516f8f345104212b2.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\43e69094d76b8f4516f8f345104212b2.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
2408	server.exe

Loads dropped DLL 1 IoCs

pid	Process
2444	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\43e69094d76b8f4516f8f345104212b2 = "\"C:\\ProgramData\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\43e69094d76b8f4516f8f345104212b2 = "\"C:\\ProgramData\\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 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 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	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.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	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe
Token: 33	2408	server.exe
Token: SeIncBasePriorityPrivilege	2408	server.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2408	2444	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe	31
PID 2444 wrote to memory of 2408	2444	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe	31
PID 2444 wrote to memory of 2408	2444	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe	31
PID 2444 wrote to memory of 2408	2444	3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe	31
PID 2408 wrote to memory of 2752	2408	server.exe	32
PID 2408 wrote to memory of 2752	2408	server.exe	32
PID 2408 wrote to memory of 2752	2408	server.exe	32
PID 2408 wrote to memory of 2752	2408	server.exe	32

C:\Users\Admin\AppData\Local\Temp\3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe
"C:\Users\Admin\AppData\Local\Temp\3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2444
- C:\ProgramData\server.exe
  "C:\ProgramData\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:2408
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\ProgramData\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2752

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

System Information Discovery

1

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

\ProgramData\server.exe

Filesize
23KB

MD5
5b72c6044d819ec5431ccc0736fd9ed2

SHA1
80cf96c5f8b66de9e9f21d47f0f18e68c3b9f74a

SHA256
3a4d2f5aa836de9bbcbb5f2b91a0b4e3fc3579d7a6e96aa6919e8a6b4f855ff8

SHA512
cde2c1c13e3a136f7ffa39d1731ea336ef0a2ab074764aadbeb6eacc4350b8169e8179d95bc90e94219c1e7c4ad2658716548a2486b61a83f4fab228c8aa7238

Download Submit
memory/2408-10-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2408-11-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2408-15-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2444-0-0x00000000745C1000-0x00000000745C2000-memory.dmp

Filesize
4KB

Download
memory/2444-1-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2444-2-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2444-12-0x00000000745C0000-0x0000000074B6B000-memory.dmp

Filesize
5.7MB

Download
memory/2444-13-0x00000000745C0000-0x0000000074B6B000-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