Trojan.Dropper.WYV (file analysis)

The Trojan.Dropper.WYV 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.

What Trojan.Dropper.WYV virus can do?

• Behavioural detection: Executable code extraction – unpacking
• SetUnhandledExceptionFilter detected (possible anti-debug)
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Possible date expiration check, exits too soon after checking local time
• Dynamic (imported) function loading detected
• Enumerates the modules from a process (may be used to locate base addresses in process injection)
• Enumerates running processes
• Expresses interest in specific running processes
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Unconventionial language used in binary resources: Chinese (Simplified)
• The binary likely contains encrypted or compressed data.
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• Behavioural detection: Injection (Process Hollowing)
• Executed a process and injected code into it, probably while unpacking
• Code injection with CreateRemoteThread in a remote process
• Deletes its original binary from disk
• Behavioural detection: Injection (inter-process)
• Behavioural detection: Injection with CreateRemoteThread in a remote process
• Tries to unhook or modify Windows functions monitored by Cuckoo
• Collects information to fingerprint the system

How to determine Trojan.Dropper.WYV?

File Info:
name: 49A70EF39C8EA54F6C46.mlwpath: /opt/CAPEv2/storage/binaries/4717a7cac3b9e0968c1a6f3d5d286d0610946b8b9cea8f70c562a1ec94267fdacrc32: 510AB1CDmd5: 49a70ef39c8ea54f6c462479262ad192sha1: 3879a9066a3cab1a6354f80b5b225b6b03eb451bsha256: 4717a7cac3b9e0968c1a6f3d5d286d0610946b8b9cea8f70c562a1ec94267fdasha512: b8cb406d87e0971aa80acf05d5457decaa6588da713e44a118f98f3eed4c50e53e7877bf501aae1b3182eeda3f0a5e145c0624901226deaee8590346f06c0e64ssdeep: 6144:Wj9Gg8GgoRX1nPRUUuk0CKhY/TzrzX7LbH+OxKj9X4tz:SglG9RX9PbukjP/X7PHNxK9etype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T17354020290071867E5766971AEDE64C41AFC7E672380A1EFEB882C4C20F5977F861DBDsha3_384: 9d33012f6b1c6f08150b089d0f1d0c00eda26703a85a354fc646efa706f2cd26abcac42562ec156f7f4b7992230d7e5cep_bytes: 558bec6aff68287e4000681467400064timestamp: 2014-05-17 17:27:39
Version Info:
0: [No Data]

Trojan.Dropper.WYV also known as:

How to remove Trojan.Dropper.WYV?

• 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.