TrojanDropper:Win32/Vundo.AB (file analysis)

The TrojanDropper:Win32/Vundo.AB 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 TrojanDropper:Win32/Vundo.AB virus can do?

• SetUnhandledExceptionFilter detected (possible anti-debug)
• Behavioural detection: Executable code extraction – unpacking
• Sample contains Overlay data
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Checks adapter addresses which can be used to detect virtual network interfaces
• 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
• 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
• Uses Windows utilities for basic functionality
• Detects Sandboxie through the presence of a library
• Detects SunBelt Sandbox through the presence of a library
• Enumerates services, possibly for anti-virtualization
• Detects the presence of Wine emulator via function name
• Deletes its original binary from disk
• A process attempted to delay the analysis task by a long amount of time.
• Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config
• Installs itself for autorun at Windows startup
• Checks the version of Bios, possibly for anti-virtualization
• Checks the presence of disk drives in the registry, possibly for anti-virtualization
• Deletes executed files from disk
• Collects information to fingerprint the system

How to determine TrojanDropper:Win32/Vundo.AB?

File Info:
name: 9686E85CFDA5AB31C4D2.mlwpath: /opt/CAPEv2/storage/binaries/f09f5c6f6763b2e3d478145e5bb240c31da819ddb0f1c4e08053d1a771375264crc32: 742D1340md5: 9686e85cfda5ab31c4d2a1479206bb21sha1: 33ce0aeb2f000b9f1578bc2a92284737327b5f36sha256: f09f5c6f6763b2e3d478145e5bb240c31da819ddb0f1c4e08053d1a771375264sha512: dccc2cd47a026e0fa48b49138813e33af4334987bb5110f6925af9a014402d54fc80ff6542abb1e6adbe46a6e9bf9c3b7c02725a1e452a3e376fbb3febd484d0ssdeep: 24576:0vFQ5twUA8Pd0oJpXKP92JcK6Ci3GrMtetCsKENN/gjXVdzyz:0vFQ5B/PiGrMyBNNYLzyztype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1F445AF2378C9C5B8D3552C780D56EC38DB2AB2AB21264DC7F3D8473A4F76206D8475AEsha3_384: dc01aea8f84a0a37a1d163c60f96dbcc47f2041ca107c8af07583b0c4941a4b947c7a7a43954f268432d5074935ac655ep_bytes: e859530100e978feffffccccccccccdbtimestamp: 2013-12-07 18:26:04
Version Info:
0: [No Data]

TrojanDropper:Win32/Vundo.AB also known as:

How to remove TrojanDropper:Win32/Vundo.AB?

• 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.