njrat | 35b46563f4d1ef02e7e2a315df8bbf0f8c2e49803856af0cf1418ea19fba58cf

Analysis

max time kernel
140s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2024 15:05

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General

Target

start.exe
Size

93KB
MD5

937286297fbc003e6a69fdc0f02ce8b0
SHA1

2ebd595bbb357264649f17f8b066941f05befefb
SHA256

35b46563f4d1ef02e7e2a315df8bbf0f8c2e49803856af0cf1418ea19fba58cf
SHA512

9c26792ef5102c7215afae12264e2eca6c2a0f9ed67d9b84918b720f4ca81b5fa2cdb59a28f4089e25abb93243a3d90e98d45dda9862286e2e074708eaf405f4
SSDEEP

1536:t8NBNvGfr2p4dTc/hDjEwzGi1dDmD4gS:t8Yfr2p4dI/Gi1dwh

Score

10^/10

njrat evasion trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Modifies Windows Firewall 1 TTPs 2 IoCs

evasion

Windows Service

T1543.003

pid	Process
4812	netsh.exe
2276	netsh.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	start.exe

Drops startup file 6 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe
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\60742add55fe12a61a5fe6a3cf32e5c0Windows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\60742add55fe12a61a5fe6a3cf32e5c0Windows Update.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
4716	server.exe

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 created	C:\Windows\SysWOW64\Explower.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\Explower.exe	server.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Explower.exe	server.exe
File opened for modification	C:\Program Files (x86)\Explower.exe	server.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2368	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe
4716	server.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4716	server.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	4716	server.exe
Token: 33	4716	server.exe
Token: SeIncBasePriorityPrivilege	4716	server.exe
Token: 33	4716	server.exe
Token: SeIncBasePriorityPrivilege	4716	server.exe
Token: 33	4716	server.exe
Token: SeIncBasePriorityPrivilege	4716	server.exe
Token: 33	4716	server.exe
Token: SeIncBasePriorityPrivilege	4716	server.exe
Token: 33	4716	server.exe
Token: SeIncBasePriorityPrivilege	4716	server.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 4716	1264	start.exe	92
PID 1264 wrote to memory of 4716	1264	start.exe	92
PID 1264 wrote to memory of 4716	1264	start.exe	92
PID 4716 wrote to memory of 4812	4716	server.exe	93
PID 4716 wrote to memory of 4812	4716	server.exe	93
PID 4716 wrote to memory of 4812	4716	server.exe	93
PID 4716 wrote to memory of 2276	4716	server.exe	107
PID 4716 wrote to memory of 2276	4716	server.exe	107
PID 4716 wrote to memory of 2276	4716	server.exe	107
PID 4716 wrote to memory of 2000	4716	server.exe	108
PID 4716 wrote to memory of 2000	4716	server.exe	108
PID 4716 wrote to memory of 2000	4716	server.exe	108
PID 2000 wrote to memory of 2368	2000	cmd.exe	111
PID 2000 wrote to memory of 2368	2000	cmd.exe	111
PID 2000 wrote to memory of 2368	2000	cmd.exe	111

C:\Users\Admin\AppData\Local\Temp\start.exe
"C:\Users\Admin\AppData\Local\Temp\start.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops autorun.inf file
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4716
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:4812
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe"
    3⤵
    - Modifies Windows Firewall
    PID:2276
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /c ping 0 -n 2 & del "C:\Users\Admin\AppData\Local\Temp\server.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2000
  - - C:\Windows\SysWOW64\PING.EXE
      ping 0 -n 2
      4⤵
      Runs ping.exe
      PID:2368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\server.exe

Filesize
93KB

MD5
937286297fbc003e6a69fdc0f02ce8b0

SHA1
2ebd595bbb357264649f17f8b066941f05befefb

SHA256
35b46563f4d1ef02e7e2a315df8bbf0f8c2e49803856af0cf1418ea19fba58cf

SHA512
9c26792ef5102c7215afae12264e2eca6c2a0f9ed67d9b84918b720f4ca81b5fa2cdb59a28f4089e25abb93243a3d90e98d45dda9862286e2e074708eaf405f4

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

Filesize
5B

MD5
bbcd2be775370c1e106e66d077a93f3b

SHA1
a44b6a98f30e3275fc304bc3b29e0eab8ae47f20

SHA256
a7aa76f137ba550c381cfb8e5195a01963ae49db167e1cd1e0a8b902ed81eda1

SHA512
bb6e0d1f24253a9525fd538debf8ca68eb7078cb8539140c184331a854ecdea192fbcc314c4154a0a474c9aec41a79efeb8150922454c3c9e71eeb5297ae2f72

Download Submit
memory/1264-0-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/1264-1-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/1264-2-0x0000000001550000-0x0000000001560000-memory.dmp

Filesize
64KB

Download
memory/1264-18-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4716-15-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4716-14-0x0000000001060000-0x0000000001070000-memory.dmp

Filesize
64KB

Download
memory/4716-12-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4716-54-0x0000000001060000-0x0000000001070000-memory.dmp

Filesize
64KB

Download
memory/4716-55-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4716-56-0x0000000001060000-0x0000000001070000-memory.dmp

Filesize
64KB

Download
memory/4716-57-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4716-58-0x0000000001060000-0x0000000001070000-memory.dmp

Filesize
64KB

Download
memory/4716-61-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download