njrat | 49d0d4770eb085e0880bcd9ccb5f36c8a79ad63ba104c1cb6d702eb75d448ec7

Analysis

max time kernel
151s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
26/02/2024, 04:49

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General

Target
a5785b42b8dd7192cefb84b38e7ba0e9.exe
Size 402KB
Sample240226-ffvfasdf7z
SHA256 49d0d4770eb085e0880bcd9ccb5f36c8a79ad63ba104c1cb6d702eb75d448ec7
MD5 a5785b42b8dd7192cefb84b38e7ba0e9
SHA1 25866d61f4291720797c5f7f5d5ea5f5c988be22
SHA512 1f25adcfe16144e6fc7bad45de98846abe423f5d018a366288df45976cfba8c234fb6d3b2144bea4a0a50d5bc79f9e69a810bd978ca1520bf93b2e250b06de52
SSDEEP 6144:2maKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgW:XSmLAuEY71fviagATFmebVQDcYc6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

njrat pdf evasion persistence trojan upx

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

hhhmach.ddns.net:1177

Mutex

5cd8f17f4086744065eb0992a09e05a2

Attributes

reg_key
5cd8f17f4086744065eb0992a09e05a2
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
3244	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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	test.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe

Executes dropped EXE 2 IoCs

pid	Process
720	test.exe
4764	Trojan.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000400000-0x00000000004FA000-memory.dmp	upx
behavioral2/memory/4812-1-0x0000000000400000-0x00000000004FA000-memory.dmp	upx
behavioral2/memory/4812-17-0x0000000000400000-0x00000000004FA000-memory.dmp	upx
behavioral2/memory/4812-24-0x0000000000400000-0x00000000004FA000-memory.dmp	upx

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-1-5-21-3844919115-497234255-166257750-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\5cd8f17f4086744065eb0992a09e05a2 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Trojan.exe\" .."	Trojan.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\5cd8f17f4086744065eb0992a09e05a2 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Trojan.exe\" .."	Trojan.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
492	4812	WerFault.exe	83
2644	4812	WerFault.exe	83

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe
4764	Trojan.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4764	Trojan.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 2888	4812	a5785b42b8dd7192cefb84b38e7ba0e9.exe	89
PID 4812 wrote to memory of 2888	4812	a5785b42b8dd7192cefb84b38e7ba0e9.exe	89
PID 4812 wrote to memory of 2888	4812	a5785b42b8dd7192cefb84b38e7ba0e9.exe	89
PID 2888 wrote to memory of 720	2888	cmd.exe	90
PID 2888 wrote to memory of 720	2888	cmd.exe	90
PID 2888 wrote to memory of 720	2888	cmd.exe	90
PID 720 wrote to memory of 4764	720	test.exe	91
PID 720 wrote to memory of 4764	720	test.exe	91
PID 720 wrote to memory of 4764	720	test.exe	91
PID 4764 wrote to memory of 3244	4764	Trojan.exe	93
PID 4764 wrote to memory of 3244	4764	Trojan.exe	93
PID 4764 wrote to memory of 3244	4764	Trojan.exe	93

C:\Users\Admin\AppData\Local\Temp\a5785b42b8dd7192cefb84b38e7ba0e9.exe
"C:\Users\Admin\AppData\Local\Temp\a5785b42b8dd7192cefb84b38e7ba0e9.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4812 -s 252
  2⤵
  - Program crash
  PID:492
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:720
  - - C:\Users\Admin\AppData\Local\Temp\Trojan.exe
      "C:\Users\Admin\AppData\Local\Temp\Trojan.exe"
      4⤵
      Drops startup file
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4764
    - - C:\Windows\SysWOW64\netsh.exe
        
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Trojan.exe" "Trojan.exe" ENABLE
        5⤵
        Modifies Windows Firewall
        
        PID:3244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4812 -s 172
  2⤵
  - Program crash
  PID:2644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4812 -ip 4812
1⤵
PID:2944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4812 -ip 4812
1⤵
PID:2240

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

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

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

test.exe

Path C:\Users\Admin\AppData\Local\Temp\test.exe
Size 78KB
SHA256 71e1add662041fee9ff0ddf0139154cf006538559af45f34047aac91efb1b8eb
MD5 42c5854aa0709d8bf6c28ea82c67b9a5
SHA1 124ea473f0572009de85a4a46f361109f4fae7d6
SHA512 c0f4412f2237138b5b66ecc285d7f44bacd67ae23feb0a55561cd4f7850ee6b0fd1b1dac3d2725ed4932aaf155b0fbda284a69b07594789bdb4cbcf0f499d95a
SSDEEP 1536:57JM7EhKhG29juLFOoUslM0l00hEmMWmgJUdk:HMwIA29AOTslM020hEZW2dk
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/720-8-0x0000000001AA0000-0x0000000001AB0000-memory.dmp

Download

memory/720-19-0x0000000074AD0000-0x0000000075081000-memory.dmp

Download

memory/720-6-0x0000000074AD0000-0x0000000075081000-memory.dmp

Download

memory/720-7-0x0000000074AD0000-0x0000000075081000-memory.dmp

Download

memory/4764-20-0x0000000074AD0000-0x0000000075081000-memory.dmp

Download

memory/4764-25-0x0000000074AD0000-0x0000000075081000-memory.dmp

Download

memory/4764-31-0x0000000000E00000-0x0000000000E10000-memory.dmp

Download

memory/4764-30-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/4764-21-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/4764-22-0x0000000074AD0000-0x0000000075081000-memory.dmp

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memory/4764-29-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/4764-28-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/4764-26-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/4764-27-0x0000000000E00000-0x0000000000E10000-memory.dmp

Download

memory/4812-17-0x0000000000400000-0x00000000004FA000-memory.dmp

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memory/4812-24-0x0000000000400000-0x00000000004FA000-memory.dmp

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memory/4812-0-0x0000000000400000-0x00000000004FA000-memory.dmp

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memory/4812-1-0x0000000000400000-0x00000000004FA000-memory.dmp

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