Dropper.91 malicious file

The Dropper.91 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 Dropper.91 virus can do?

• Behavioural detection: Executable code extraction – unpacking
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Anomalous file deletion behavior detected (10+)
• Dynamic (imported) function loading detected
• At least one IP Address, Domain, or File Name was found in a crypto call
• Enumerates running processes
• Expresses interest in specific running processes
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• The binary likely contains encrypted or compressed data.
• Authenticode signature is invalid
• Code injection with CreateRemoteThread in a remote process
• Behavioural detection: Injection (inter-process)
• Behavioural detection: Injection with CreateRemoteThread in a remote process
• Tries to unhook or modify Windows functions monitored by Cuckoo
• Steals private information from local Internet browsers
• Collects and encrypts information about the computer likely to send to C2 server
• Attempts to modify browser security settings
• Harvests credentials from local FTP client softwares
• Clears web history

How to determine Dropper.91?

File Info:
name: 3D6DB37EE99B7298EF61.mlwpath: /opt/CAPEv2/storage/binaries/3f062071a4757d4122f7d9a263299b0dd76a251ff512e0fd0393419dab29d7bdcrc32: 71AC878Amd5: 3d6db37ee99b7298ef610f8a54bb86easha1: 09ed30e07202a9648ce07d6ac99812e23cc47122sha256: 3f062071a4757d4122f7d9a263299b0dd76a251ff512e0fd0393419dab29d7bdsha512: 84659912a59e3c3135eddf7efd08b46de1c04151a9eae8b756cb06e6217b4a22d473d1d553c2fb554b54f8b473b96173ccdf1d1feeee083a8d1712c64137fab1ssdeep: 1536:0lftjHK5nwkN5z+MZ6yOV6ke03qPxHV+TfY8LCZMTOSiWrrn6go0u9Saff097b+m:MFUwkNJV6NQzlZsTNaMT93nZ7anc92type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T12DC3028AB683D1B6EE550570C5AB9EB51FCC6C8F070006C7748D6BEB6FB61856C236C2sha3_384: 3ad872694396bcaec5e2cc4e0db32129c0f4ab1570f390ad07e51fe8bf037f7fbc3289fdcfed864cab52eba4c0592697ep_bytes: 558bec6aff68d01c4100688047400064timestamp: 2011-10-16 14:51:21
Version Info:
0: [No Data]

Dropper.91 also known as:

How to remove Dropper.91?

• 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.