njrat | ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12

Analysis

max time kernel
120s
max time network
116s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 23:52

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General

Target

ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe
Size

135KB
MD5

33bf20431181a09f3f1ec1aae1d69da0
SHA1

aa1e9893361614bb82b3a1a8a94a84b8970da674
SHA256

ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12
SHA512

92fd38965c19daefaac896280e861c85652e4e227ad47a860ddc4a2f7c6cd3b489b9020ca38e627b813bc8bf7755c9f1d561490c228914e774aebbcefe46fbd9
SSDEEP

3072:xVq7Ganmup+nXhrn+FuKqCg/DREWU+gZCo5:LSmfnXhT+VqCgdfUvZN5

Score

10^/10

njrat chrome evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

chrome

147.185.221.21:43492

Mutex

408747fd467c7d10dbd55bb8e0781708

Attributes

reg_key
408747fd467c7d10dbd55bb8e0781708
splitter
|'|'|

Signatures

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
3032	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\408747fd467c7d10dbd55bb8e0781708.exe	chorme.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\408747fd467c7d10dbd55bb8e0781708.exe	chorme.exe

Executes dropped EXE 1 IoCs

pid	Process
2724	chorme.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\408747fd467c7d10dbd55bb8e0781708 = "\"C:\\Users\\Admin\\chorme.exe\" .."	chorme.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\408747fd467c7d10dbd55bb8e0781708 = "\"C:\\Users\\Admin\\chorme.exe\" .."	chorme.exe

Drops autorun.inf file 1 TTPs 5 IoCs

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

Replication Through Removable Media

T1091

description	ioc	Process
File created	F:\autorun.inf	chorme.exe
File opened for modification	F:\autorun.inf	chorme.exe
File created	C:\autorun.inf	chorme.exe
File opened for modification	C:\autorun.inf	chorme.exe
File created	D:\autorun.inf	chorme.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\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe
2724	chorme.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2724	chorme.exe

Suspicious use of AdjustPrivilegeToken 27 IoCs

description	pid	Process
Token: SeDebugPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe
Token: 33	2724	chorme.exe
Token: SeIncBasePriorityPrivilege	2724	chorme.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2724	2076	ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe	30
PID 2076 wrote to memory of 2724	2076	ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe	30
PID 2076 wrote to memory of 2724	2076	ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe	30
PID 2724 wrote to memory of 3032	2724	chorme.exe	31
PID 2724 wrote to memory of 3032	2724	chorme.exe	31
PID 2724 wrote to memory of 3032	2724	chorme.exe	31

C:\Users\Admin\AppData\Local\Temp\ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe
"C:\Users\Admin\AppData\Local\Temp\ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12N.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Users\Admin\chorme.exe
  "C:\Users\Admin\chorme.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops autorun.inf file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2724
- - C:\Windows\system32\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\chorme.exe" "chorme.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    PID:3032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\chorme.exe

Filesize
135KB

MD5
33bf20431181a09f3f1ec1aae1d69da0

SHA1
aa1e9893361614bb82b3a1a8a94a84b8970da674

SHA256
ecbd6b6eb454ce86d7e6ab1ca22f8919f6b595193d2f04e093dcf4c90b8d0d12

SHA512
92fd38965c19daefaac896280e861c85652e4e227ad47a860ddc4a2f7c6cd3b489b9020ca38e627b813bc8bf7755c9f1d561490c228914e774aebbcefe46fbd9

Download Submit
memory/2076-0-0x000007FEF65EE000-0x000007FEF65EF000-memory.dmp

Filesize
4KB

Download
memory/2076-1-0x0000000001D60000-0x0000000001D80000-memory.dmp

Filesize
128KB

Download
memory/2076-2-0x000007FEF6330000-0x000007FEF6CCD000-memory.dmp

Filesize
9.6MB

Download
memory/2076-8-0x000007FEF6330000-0x000007FEF6CCD000-memory.dmp

Filesize
9.6MB

Download
memory/2724-9-0x000007FEF6330000-0x000007FEF6CCD000-memory.dmp

Filesize
9.6MB

Download
memory/2724-10-0x000007FEF6330000-0x000007FEF6CCD000-memory.dmp

Filesize
9.6MB

Download
memory/2724-20-0x000007FEF6330000-0x000007FEF6CCD000-memory.dmp

Filesize
9.6MB

Download