njrat | 233f9f88c16fb185eb91f4afc116b808eb8fa5fd0cf1b3d3a92ec6732c56314b

Analysis

max time kernel
146s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 01:44

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General

Target

Bootstrapper.exe
Size

19.0MB
MD5

4581b2e238f1dad629dc72c168b2be8e
SHA1

74dce1860065aad35cb68115545bdf862bddb775
SHA256

233f9f88c16fb185eb91f4afc116b808eb8fa5fd0cf1b3d3a92ec6732c56314b
SHA512

dcea04ffffdf35107a0cd6998eaef3f91270985c80028c206f59ae7d9b193defb3089826a7d1118391f849618904fdf7e77621348531b711d2eac89f422d132a
SSDEEP

24576:tigOpgzfDfMSCWk6/SCOqZkHIyGigOpgzfDfMSCWk6/SCOqZkHIy:dB5CW9/SCzhycB5CW9/SCzhy

Score

10^/10

njrat hacked defense_evasion discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

hakim32.ddns.net:2000

86.1.93.186:25565

Mutex

7b8566fe52762c19d1b844b254fc8d30

Attributes

reg_key
7b8566fe52762c19d1b844b254fc8d30
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
3000	netsh.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7b8566fe52762c19d1b844b254fc8d30Windows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7b8566fe52762c19d1b844b254fc8d30Windows Update.exe	server.exe

Executes dropped EXE 4 IoCs

pid	Process
2736	BootstrapperV1.22.exe
2844	svchost.exe
1204	Process not Found
2068	server.exe

Loads dropped DLL 11 IoCs

pid	Process
2648	Bootstrapper.exe
2648	Bootstrapper.exe
2648	Bootstrapper.exe
2360	Process not Found
2844	svchost.exe
2844	svchost.exe
984	WerFault.exe
984	WerFault.exe
984	WerFault.exe
984	WerFault.exe
984	WerFault.exe

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Drops autorun.inf file 1 TTPs 4 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File created	C:\autorun.inf	server.exe
File opened for modification	C:\autorun.inf	server.exe
File created	F:\autorun.inf	server.exe
File opened for modification	F:\autorun.inf	server.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Explower.exe	server.exe
File created	C:\Windows\SysWOW64\Explower.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 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	Bootstrapper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2572	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2696	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2068	server.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeIncreaseQuotaPrivilege	2636	WMIC.exe
Token: SeSecurityPrivilege	2636	WMIC.exe
Token: SeTakeOwnershipPrivilege	2636	WMIC.exe
Token: SeLoadDriverPrivilege	2636	WMIC.exe
Token: SeSystemProfilePrivilege	2636	WMIC.exe
Token: SeSystemtimePrivilege	2636	WMIC.exe
Token: SeProfSingleProcessPrivilege	2636	WMIC.exe
Token: SeIncBasePriorityPrivilege	2636	WMIC.exe
Token: SeCreatePagefilePrivilege	2636	WMIC.exe
Token: SeBackupPrivilege	2636	WMIC.exe
Token: SeRestorePrivilege	2636	WMIC.exe
Token: SeShutdownPrivilege	2636	WMIC.exe
Token: SeDebugPrivilege	2636	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2636	WMIC.exe
Token: SeRemoteShutdownPrivilege	2636	WMIC.exe
Token: SeUndockPrivilege	2636	WMIC.exe
Token: SeManageVolumePrivilege	2636	WMIC.exe
Token: 33	2636	WMIC.exe
Token: 34	2636	WMIC.exe
Token: 35	2636	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2636	WMIC.exe
Token: SeSecurityPrivilege	2636	WMIC.exe
Token: SeTakeOwnershipPrivilege	2636	WMIC.exe
Token: SeLoadDriverPrivilege	2636	WMIC.exe
Token: SeSystemProfilePrivilege	2636	WMIC.exe
Token: SeSystemtimePrivilege	2636	WMIC.exe
Token: SeProfSingleProcessPrivilege	2636	WMIC.exe
Token: SeIncBasePriorityPrivilege	2636	WMIC.exe
Token: SeCreatePagefilePrivilege	2636	WMIC.exe
Token: SeBackupPrivilege	2636	WMIC.exe
Token: SeRestorePrivilege	2636	WMIC.exe
Token: SeShutdownPrivilege	2636	WMIC.exe
Token: SeDebugPrivilege	2636	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2636	WMIC.exe
Token: SeRemoteShutdownPrivilege	2636	WMIC.exe
Token: SeUndockPrivilege	2636	WMIC.exe
Token: SeManageVolumePrivilege	2636	WMIC.exe
Token: 33	2636	WMIC.exe
Token: 34	2636	WMIC.exe
Token: 35	2636	WMIC.exe
Token: SeDebugPrivilege	2736	BootstrapperV1.22.exe
Token: SeDebugPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe
Token: SeIncBasePriorityPrivilege	2068	server.exe
Token: 33	2068	server.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2696	2648	Bootstrapper.exe	30
PID 2648 wrote to memory of 2696	2648	Bootstrapper.exe	30
PID 2648 wrote to memory of 2696	2648	Bootstrapper.exe	30
PID 2648 wrote to memory of 2696	2648	Bootstrapper.exe	30
PID 2648 wrote to memory of 2736	2648	Bootstrapper.exe	32
PID 2648 wrote to memory of 2736	2648	Bootstrapper.exe	32
PID 2648 wrote to memory of 2736	2648	Bootstrapper.exe	32
PID 2648 wrote to memory of 2736	2648	Bootstrapper.exe	32
PID 2648 wrote to memory of 2844	2648	Bootstrapper.exe	34
PID 2648 wrote to memory of 2844	2648	Bootstrapper.exe	34
PID 2648 wrote to memory of 2844	2648	Bootstrapper.exe	34
PID 2648 wrote to memory of 2844	2648	Bootstrapper.exe	34
PID 2736 wrote to memory of 2544	2736	BootstrapperV1.22.exe	35
PID 2736 wrote to memory of 2544	2736	BootstrapperV1.22.exe	35
PID 2736 wrote to memory of 2544	2736	BootstrapperV1.22.exe	35
PID 2544 wrote to memory of 2572	2544	cmd.exe	37
PID 2544 wrote to memory of 2572	2544	cmd.exe	37
PID 2544 wrote to memory of 2572	2544	cmd.exe	37
PID 2844 wrote to memory of 2068	2844	svchost.exe	38
PID 2844 wrote to memory of 2068	2844	svchost.exe	38
PID 2844 wrote to memory of 2068	2844	svchost.exe	38
PID 2844 wrote to memory of 2068	2844	svchost.exe	38
PID 2068 wrote to memory of 3000	2068	server.exe	39
PID 2068 wrote to memory of 3000	2068	server.exe	39
PID 2068 wrote to memory of 3000	2068	server.exe	39
PID 2068 wrote to memory of 3000	2068	server.exe	39
PID 2736 wrote to memory of 2716	2736	BootstrapperV1.22.exe	41
PID 2736 wrote to memory of 2716	2736	BootstrapperV1.22.exe	41
PID 2736 wrote to memory of 2716	2736	BootstrapperV1.22.exe	41
PID 2716 wrote to memory of 2636	2716	cmd.exe	43
PID 2716 wrote to memory of 2636	2716	cmd.exe	43
PID 2716 wrote to memory of 2636	2716	cmd.exe	43
PID 2736 wrote to memory of 984	2736	BootstrapperV1.22.exe	45
PID 2736 wrote to memory of 984	2736	BootstrapperV1.22.exe	45
PID 2736 wrote to memory of 984	2736	BootstrapperV1.22.exe	45

C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHIAbABkACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAGwAZQBqACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGUAeQBmACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHQAYQB4ACMAPgA="
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2696
- C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.22.exe
  "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.22.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\system32\cmd.exe
    "cmd" /c ipconfig /all
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2544
  - - C:\Windows\system32\ipconfig.exe
      ipconfig /all
      4⤵
      Gathers network information
      PID:2572
- - C:\Windows\system32\cmd.exe
    "cmd" /c wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2716
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic nicconfig where (IPEnabled=TRUE) call SetDNSServerSearchOrder ("1.1.1.1", "1.0.0.1")
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2636
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2736 -s 1124
    3⤵
    - Loads dropped DLL
    PID:984
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Users\Admin\AppData\Local\Temp\server.exe
    "C:\Users\Admin\AppData\Local\Temp\server.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Drops autorun.inf file
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2068
  - - 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:3000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Command and Scripting Interpreter

T1059

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Obfuscated Files or Information

T1027

Command Obfuscation

T1027.010

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.22.exe

Filesize
800KB

MD5
2a4dcf20b82896be94eb538260c5fb93

SHA1
21f232c2fd8132f8677e53258562ad98b455e679

SHA256
ebbcb489171abfcfce56554dbaeacd22a15838391cbc7c756db02995129def5a

SHA512
4f1164b2312fb94b7030d6eb6aa9f3502912ffa33505f156443570fc964bfd3bb21ded3cf84092054e07346d2dce83a0907ba33f4ba39ad3fe7a78e836efe288

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
93KB

MD5
053913a8ea56bc5973dd3aa48dfa0a57

SHA1
f291c838cac064afe19dc618df7dba91c71c5ec6

SHA256
d6147d18985d4ab04c8e23d1f755ba92765ea63daf8bb498b18dbd5586ce8a25

SHA512
31d52760f4ae13f57f87ab17124141e55560c52e41ed013d9739fb1b856f1b1f02ba2f23f0b1ca7640a2edcb5aadf6511160d2f65625db3951082e85e3e16643

Download Submit
C:\Users\Admin\AppData\Roaming\app

Filesize
4B

MD5
fba73ce50d8cfb469ec29a2333b22a85

SHA1
4b7b6dfb36af4a016301dc065870dd0829db0a55

SHA256
56ae4e1144656432194c610e366fb556f7401a9993e75c0007f46397a5ddfa03

SHA512
b620d99e15c25e970a09738d14b493b2345ec1eb48737e2983565666a3c052d235712db01a110c9948dc00d62a14fcccf43ccc295f993d673334dc88497c77c7

Download Submit
memory/2736-19-0x0000000000B40000-0x0000000000C0E000-memory.dmp

Filesize
824KB

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