njrat | 7b98971fec556ad5d6e994853395525da068c2f3e1cfd92b6388c37934e14533

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
31-10-2023 04:08

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General

Target

bRce.exe
Size

23KB
MD5

37bbdd80623474e7b479915629b4346e
SHA1

a6ce0e8167530a7fdd57243a1fa551364e0e1943
SHA256

7b98971fec556ad5d6e994853395525da068c2f3e1cfd92b6388c37934e14533
SHA512

498160664478a1d134ee0ef1574ae1367c222f435bbf631566234ff5ed96b95fef1b7d9ce599e7c4ffc733fd2fd89e7ec971879e2beac51b51c0eb41b0a6bd9c
SSDEEP

384:GcqbCK0l4h7o9SVyDGvENuh46/gJkOmMSW38mRvR6JZlbw8hqIusZzZRsYC:J30py6vhxaRpcnu0hC

Score

10^/10

njrat evasion trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Windows Service
T1543.003

Processes:

netsh.exe

pid process

2240 netsh.exe

pid	process
2240	netsh.exe

Drops startup file 2 IoCs

Processes:

bRce.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\745fb02f1b6366ca13f958bd219cc7b3.exe	bRce.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\745fb02f1b6366ca13f958bd219cc7b3.exe	bRce.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

Processes:

bRce.exe

description	pid	process
Token: SeDebugPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe
Token: 33	2436	bRce.exe
Token: SeIncBasePriorityPrivilege	2436	bRce.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

bRce.exe

description	pid	process	target process
PID 2436 wrote to memory of 2240	2436	bRce.exe	netsh.exe
PID 2436 wrote to memory of 2240	2436	bRce.exe	netsh.exe
PID 2436 wrote to memory of 2240	2436	bRce.exe	netsh.exe
PID 2436 wrote to memory of 2240	2436	bRce.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\bRce.exe
"C:\Users\Admin\AppData\Local\Temp\bRce.exe"
1⤵
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2436

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\bRce.exe" "bRce.exe" ENABLE
2⤵
- Modifies Windows Firewall
PID:2240

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2436-0-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/2436-1-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/2436-2-0x0000000000CD0000-0x0000000000D10000-memory.dmp

Filesize
256KB

Download
memory/2436-4-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/2436-5-0x0000000074070000-0x000000007461B000-memory.dmp

Filesize
5.7MB

Download
memory/2436-6-0x0000000000CD0000-0x0000000000D10000-memory.dmp

Filesize
256KB

Download
memory/2436-7-0x0000000000CD0000-0x0000000000D10000-memory.dmp

Filesize
256KB

Download
memory/2436-8-0x0000000000CD0000-0x0000000000D10000-memory.dmp

Filesize
256KB

Download