PWS:Win32/Zbot.AIS removal

The PWS:Win32/Zbot.AIS 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 PWS:Win32/Zbot.AIS 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
• Guard pages use detected – possible anti-debugging.
• 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 0.0.0.0:18402, :0, 127.0.0.1:16959
• Enumerates running processes
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• The binary likely contains encrypted or compressed data.
• 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
• Collects information about installed applications
• Attempts to modify proxy settings
• Attempts to modify browser security settings
• Harvests credentials from local FTP client softwares
• Collects information to fingerprint the system

How to determine PWS:Win32/Zbot.AIS?

File Info:
name: F6F23803635A3BA39D1A.mlw
path: /opt/CAPEv2/storage/binaries/65f2fc3fe29f03e0828d92ac3b9b448960de89347fd1f7eb739aacf33a3f2c5d
crc32: 2046D9E6
md5: f6f23803635a3ba39d1a523ac7a54400
sha1: e560e92603022c7d08f927d45bd9134a6bb01eca
sha256: 65f2fc3fe29f03e0828d92ac3b9b448960de89347fd1f7eb739aacf33a3f2c5d
sha512: da33bd4163189c4e0e3136a2ffdcf320f87d89a2e04029fed643e152c7a9e9157798e96bc5f53174e4169f1672aa0eaa12c67224daab5ef8b29733f1675f9f97
ssdeep: 6144:JSHArIvPX/85tIXOUXamnY96Elwl0SfXasyQjZtvnKgqzP9wPOpbqmfqiG+Z9UaA:MHArIvPk5twXamElwRfX3jZtvQuPqLk
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T18D84BE247CF39335FCE60A7F49E3D11DC9DA26318EB26961235416AADFD13804B2F269
sha3_384: fc83191b52cf5cb4608261dcbc5b3ebb3acbf9d3a38911cbb76ab2cb80ec7b841f899291d73bba42bee12d2634b201cb
ep_bytes: e812430000e989feffff8bff558bec81
timestamp: 2013-04-23 20:35:40

Version Info:
0: [No Data]

PWS:Win32/Zbot.AIS also known as:

How to remove PWS:Win32/Zbot.AIS?

• 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.