Win32/Injector.UST information

The Win32/Injector.UST 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 Win32/Injector.UST 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
• Possible date expiration check, exits too soon after checking local time
• Anomalous file deletion behavior detected (10+)
• Guard pages use detected – possible anti-debugging.
• A process attempted to delay the analysis task.
• Dynamic (imported) function loading detected
• Performs HTTP requests potentially not found in PCAP.
• HTTPS urls from behavior.
• Enumerates running processes
• Reads data out of its own binary image
• A process created a hidden window
• Attempts to modify Internet Explorer’s start page
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• Unconventionial language used in binary resources: Spanish (Peru)
• The binary likely contains encrypted or compressed data.
• Removes Security and Maintenance icon from Start menu, Taskbar and notifications
• 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
• Behavioural detection: Injection (inter-process)
• Created a process from a suspicious location
• Steals private information from local Internet browsers
• Network activity contains more than one unique useragent.
• Installs itself for autorun at Windows startup
• Attempts to modify proxy settings
• Operates on local firewall’s policies and settings
• Creates a copy of itself
• Attempts to disable or modify Explorer Folder Options
• Attempts to disable or modify the Run command from the Start menu and the New Task (Run) command from Task Manager
• Attempts to disable System Restore
• Attempts to disable UAC
• Harvests cookies for information gathering
• The sample wrote data to the system hosts file.
• Attempts to modify or disable Security Center warnings
• Attempts to modify UAC prompt behavior
• Modifies Image File Execution Options, indicative of process injection or persistence
• Attempts to modify Explorer settings to prevent file extensions from being displayed
• Attempts to modify Explorer settings to prevent hidden files from being displayed
• Attempts to modify user notification settings
• Uses suspicious command line tools or Windows utilities

How to determine Win32/Injector.UST?

File Info:
name: F989C6C6B4EBA4E9D0B6.mlwpath: /opt/CAPEv2/storage/binaries/57ab275f775b443ba0bab1d7b53d06d356f1e0813def32263fe009904ce05866crc32: 336D1262md5: f989c6c6b4eba4e9d0b60c3fc7ea7b61sha1: 5ea0c9f87a38872087b5906ab919dd3f6648c7ecsha256: 57ab275f775b443ba0bab1d7b53d06d356f1e0813def32263fe009904ce05866sha512: db9da27aee35b9d04f1e7434bd4c65a9c357b5773ce60061f83eb216b5e71905f74714aa0e9f08383d81e99ad892c78e30a2a4a3449d3342196c0834e66b6f5fssdeep: 3072:+T3JYvEo13SklFWNVerQ+KMspBMgX24iE:W3JYvEoFJHrXkpBMV4iEtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1AD150145575A9927D22244B0B0EBD5FEEE3A6102FF960A99F524CB7C19DB3BC3C8001Esha3_384: e1d42b00a11b0405fc6c21865da7267fe863e4cd8174c48658bfa0b841e963306684e9ab2fa4261261f77a4183ca1180ep_bytes: 5589e583ec08c7042402000000ff15ectimestamp: 2012-08-12 22:10:04
Version Info:
0: [No Data]

Win32/Injector.UST also known as:

How to remove Win32/Injector.UST?

• 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.