UDS:Trojan-Dropper.Win32.Pasnaino (file analysis)

The UDS:Trojan-Dropper.Win32.Pasnaino is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

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What UDS:Trojan-Dropper.Win32.Pasnaino virus can do?

• Behavioural detection: Executable code extraction – unpacking
• A file was accessed within the Public folder.
• Sample contains Overlay data
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• The binary contains an unknown PE section name indicative of packing
• Authenticode signature is invalid
• Uses Windows utilities to create a scheduled task
• Behavioural detection: Injection (inter-process)
• Behavioural detection: Injection with CreateRemoteThread in a remote process
• Deletes executed files from disk
• Yara rule detections observed from a process memory dump/dropped files/CAPE

How to determine UDS:Trojan-Dropper.Win32.Pasnaino?

File Info:
name: 7EF6DE72CF16F994E56E.mlw
path: /opt/CAPEv2/storage/binaries/d9ae2f00872e93a99f87133e33d782c72f9aeeb67741c6abaf28f8d8637dd304
crc32: 31539EFB
md5: 7ef6de72cf16f994e56e2e3fd5fcde56
sha1: 0eba81fb095e4243efe796beaa0b6c9c69a16e86
sha256: d9ae2f00872e93a99f87133e33d782c72f9aeeb67741c6abaf28f8d8637dd304
sha512: dc7fdf475894a9939531407001585dee6abf1716fe6934528b0420453662ce04717793b6dfc68a9a10084fcb758a005da0bbdf54deb3bb849974e5376de61472
ssdeep: 49152:8qeNV4OS0hRctxDgeIXqNHGJ0YF1I8P7Jop40jpv6gWQ:JEqD2gB9I6NxYo8C4Esg7
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T172B5E03FB268653ED4AE4B3245B39260997B7B61B41B8C1E07F0081DCF6A5702E3FA55
sha3_384: 3bf87a1eab15ed8a8a34846ee1b48a56acae42269b58e51e23af153cb11f52e9b934636a8ab8495221ae07a556a288b9
ep_bytes: 558bec83c4a453565733c08945c48945
timestamp: 2020-05-21 05:56:23

Version Info:
Comments: This installation was built with Inno Setup.
CompanyName:                                                             
FileDescription: Bittorrent Setup                                            
FileVersion:                     
LegalCopyright:                                                                                                     
OriginalFileName:                                                   
ProductName: Bittorrent                                                  
ProductVersion: 3.5                                               
Translation: 0x0000 0x04b0

UDS:Trojan-Dropper.Win32.Pasnaino also known as:

How to remove UDS:Trojan-Dropper.Win32.Pasnaino?

• Download and install GridinSoft Anti-Malware.
• Open GridinSoft Anti-Malware and perform a “Standard scan“.
• “Move to quarantine” all items.
• Open “Tools” tab – Press “Reset Browser Settings“.
• Select proper browser and options – Click “Reset”.
• Restart your computer.