Istbar (PUA) malicious file

The Istbar (PUA) 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 Istbar (PUA) virus can do?

• Behavioural detection: Executable code extraction – unpacking
• A file was accessed within the Public folder.
• Sample contains Overlay data
• Presents an Authenticode digital signature
• Performs HTTP requests potentially not found in PCAP.
• Reads data out of its own binary image
• Drops a binary and executes it
• The binary contains an unknown PE section name indicative of packing
• Authenticode signature is invalid
• Attempts to modify proxy settings
• Deletes executed files from disk
• Touches a file containing cookies, possibly for information gathering
• Yara detections observed in process dumps, payloads or dropped files

How to determine Istbar (PUA)?

File Info:
name: 05A5E104A1A5DDA45CAD.mlwpath: /opt/CAPEv2/storage/binaries/7e65ded45b4c6d27a80933ec11280ea13dc3b71ac914d4058bf9543e1c4213bbcrc32: F222B9E4md5: 05a5e104a1a5dda45cad6173b8d97e3dsha1: 519d3dcf0b60e3a1d7aa404e5dbc72b4fafc9fb7sha256: 7e65ded45b4c6d27a80933ec11280ea13dc3b71ac914d4058bf9543e1c4213bbsha512: 43004735e96b6d486884ff5eb2495de25b53931e42c7eada45268f475dae24807038f7d3a8faa427ba61d46dc9bba3f4f98db78a648dc2bd463a4e239eb763bfssdeep: 49152:m6draIcFGkSHQ/aS0iHSR9NRcTmtyBiKNzVbv4s:ddraIcGa0ZdCytyBiKNzVbntype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T147A533138656E8F4C3E6AEB66E94DCD08B72FF1B18BD5D0D164F8DA85E6A3404C247E0sha3_384: 57e602a27f9ee5a30b402512217e3bec61ce5f7913880a44537b884711d982f62cf97e5f8b341bb381e3597bf4bb7fccep_bytes: 558bec83c4cc53565733c08945f08945timestamp: 1992-06-19 22:22:17
Version Info:
Comments:                                                                      CompanyName: Acro Software Inc.                                          FileDescription: CutePDF Writer Companion Setup                              FileVersion: 2.6.1.1             LegalCopyright:                                                                                                     Translation: 0x0409 0x04e4

Istbar (PUA) also known as:

How to remove Istbar (PUA)?

• 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.