Symmi.13933 removal guide

The Symmi.13933 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 Symmi.13933 virus can do?

• Behavioural detection: Executable code extraction – unpacking
• SetUnhandledExceptionFilter detected (possible anti-debug)
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Presents an Authenticode digital signature
• 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+)
• 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 127.0.0.1:21414
• Enumerates running processes
• Expresses interest in specific running processes
• Reads data out of its own binary image
• CAPE extracted potentially suspicious content
• Drops a binary and executes it
• 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
• Behavior consistent with a dropper attempting to download the next stage.
• 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
• Accessed credential storage registry keys
• Harvests cookies for information gathering
• Harvests credentials from local FTP client softwares
• Attempts to interact with an Alternate Data Stream (ADS)
• Collects information to fingerprint the system

How to determine Symmi.13933?

File Info:
name: BCB35649166DDA49E8C6.mlwpath: /opt/CAPEv2/storage/binaries/97aea26630d3b7e628c8200e2fe7f917f2c0a6c3f8633eae961ebf37fc8d1156crc32: BE8085B4md5: bcb35649166dda49e8c6cf75dfb07480sha1: 182f31147e67ad7400591884301dfd8c360c487dsha256: 97aea26630d3b7e628c8200e2fe7f917f2c0a6c3f8633eae961ebf37fc8d1156sha512: 54e772b1161ba9b29c86e71484ddfb05b5ce453b64fb3d838dc79ea8019b49a54f76d737e00810c5a58da039bed2b21deac45910b9f50969ae72d911130c8336ssdeep: 6144:gnaSbBJkg5z9kqhKUvGR081kOv7SDoHtUs/y2aWOIBJQ7NVCT:SacAIkcKNm8q87ORTWlJGCTtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T16774CF03ED5FFB9FE1670AB4C7D92339592A6AA73702409C634A15CCED627BD8052C39sha3_384: 917b3933a3bb4978d29f9e0164def13e639fb236681d5ae3059f6f570a23bb8352bcd5d2c3b44bbe247b82182d4295a9ep_bytes: 558bec518bc08bc58bc08945fc8b45fctimestamp: 2013-02-04 17:29:04
Version Info:
0: [No Data]

Symmi.13933 also known as:

How to remove Symmi.13933?

• 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.