njrat | 263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30ee

General

Target

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
Size

55KB
MD5

505c5271b804039b329f346d550e4590
SHA1

0583bff4aef09b6698e6903118568ade640252d9
SHA256

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30ee
SHA512

a6ac8e886dfcae0dea31e83df7c702be23e6c39c2ece4a7da3d31f3c8fbb9aa503df78bd99f28dedde5bedef8185ba498a139dea73dc5cf1b0a1dc4e88cc7daf
SSDEEP

1536:SXJYUmUYaB3Ky8ibpUfR/WViL8cIbJDLtff:WYe5EyNbkuVioBd9ff

Score

10^/10

njrat 1 discovery execution persistence trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

1

C2

172.0.0.1:11111

94.131.109.101:11111

Mutex

bea40e08f77dcbe9528c9454b4346452

Attributes

reg_key
bea40e08f77dcbe9528c9454b4346452
splitter
|'|'|

Signatures

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

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid	Process
2564	svchost.exe

Loads dropped DLL 1 IoCs

Processes:

RegAsm.exe

pid	Process
2764	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

powershell.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Windows\\SysWOW64\\SystemX86.exe"	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
2204	powershell.exe

Drops file in System32 directory 1 IoCs

Processes:

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

description	ioc	Process
File created	C:\Windows\SysWOW64\SystemX86.exe	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

description	pid	Process	procid_target
PID 1404 set thread context of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34

Drops file in Windows directory 1 IoCs

Processes:

RegAsm.exe

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe	RegAsm.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

powershell.exeRegAsm.exesvchost.exe263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exepowershell.exe

pid	Process
1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
2204	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
Token: SeDebugPrivilege	2204	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exeRegAsm.exe

description	pid	Process	procid_target
PID 1404 wrote to memory of 2204	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	31
PID 1404 wrote to memory of 2204	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	31
PID 1404 wrote to memory of 2204	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	31
PID 1404 wrote to memory of 2204	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	31
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2684	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	33
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 1404 wrote to memory of 2764	1404	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	34
PID 2764 wrote to memory of 2564	2764	RegAsm.exe	35
PID 2764 wrote to memory of 2564	2764	RegAsm.exe	35
PID 2764 wrote to memory of 2564	2764	RegAsm.exe	35
PID 2764 wrote to memory of 2564	2764	RegAsm.exe	35

C:\Users\Admin\AppData\Local\Temp\263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
"C:\Users\Admin\AppData\Local\Temp\263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'system';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'system' -Value '"C:\Windows\SysWOW64\SystemX86.exe"' -PropertyType 'String'
  2⤵
  - Adds Run key to start application
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2204
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2684
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\ProgramData\svchost.exe
    "C:\ProgramData\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\svchost.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
memory/1404-19-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/1404-1-0x0000000001140000-0x0000000001154000-memory.dmp

Filesize
80KB

Download
memory/1404-2-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/1404-3-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/1404-4-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/1404-5-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/1404-0-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/2204-20-0x00000000001F0000-0x0000000000230000-memory.dmp

Filesize
256KB

Download
memory/2564-28-0x00000000009E0000-0x00000000009F2000-memory.dmp

Filesize
72KB

Download
memory/2764-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-14-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-7-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2764-8-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2764-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads