About “Mal/Zbot-U” infection

The Mal/Zbot-U 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 Mal/Zbot-U virus can do?

• SetUnhandledExceptionFilter detected (possible anti-debug)
• Behavioural detection: Executable code extraction – unpacking
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Mimics the system’s user agent string for its own requests
• Possible date expiration check, exits too soon after checking local time
• 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
• Performs HTTP requests potentially not found in PCAP.
• Starts servers listening on 0.0.0.0:20497, :0
• Enumerates running processes
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• Unconventionial language used in binary resources: Russian
• The binary contains an unknown PE section name indicative of packing
• The binary likely contains encrypted or compressed data.
• The executable is compressed using UPX
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• 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
• Installs itself for autorun at Windows startup
• Attempts to modify proxy settings
• Attempts to modify browser security settings
• Harvests credentials from local FTP client softwares
• Collects information to fingerprint the system
• Clears web history

How to determine Mal/Zbot-U?

File Info:
name: EDC1478BA8BC0957D1A7.mlwpath: /opt/CAPEv2/storage/binaries/48a5b24a904e0a3cfdf4c5d6d15e67fad03faf160aea6ccacf91d9b36ce8c137crc32: D6F196F2md5: edc1478ba8bc0957d1a7b5b2e887b551sha1: 1c1e18ba3fc19d7ebdfaec69751441a2da719dfcsha256: 48a5b24a904e0a3cfdf4c5d6d15e67fad03faf160aea6ccacf91d9b36ce8c137sha512: d3c6d0b1e1d38d71a887f359ea1fa01fbe07ef9d29ef798dba1909a36e8d33ed5c33da6ff21d3ff252bb268daed42ef1da32be0de2d4b5eeaa2393deeaebb591ssdeep: 1536:VgG38bjkdla9u2EuzxwfraYJlxOYL5gbRFvoYQ1EZkjbtVUhu4YaLrtJ9Ss/iHan:8Z9u2WfmgsucFgiZMvUhzpXJtKWJtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T102C3E016F68E2E60C3B515FE710EABB1D2548D62AC21D240DB7F0F07DAB8F1427E159Asha3_384: 5dfd9f734d14f1d32ddeb82147eba2f4747f0c68873da9d1eb6f4f23aad7899395c4b77c3a984d2b7e6213bcaeebe01aep_bytes: 60be15a02b018dbeeb6f14ff57eb0b90timestamp: 2005-01-17 16:16:27
Version Info:
0: [No Data]

Mal/Zbot-U also known as:

How to remove Mal/Zbot-U?

• 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.