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.

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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.mlw
path: /opt/CAPEv2/storage/binaries/f09f5c6f6763b2e3d478145e5bb240c31da819ddb0f1c4e08053d1a771375264
crc32: 742D1340
md5: 9686e85cfda5ab31c4d2a1479206bb21
sha1: 33ce0aeb2f000b9f1578bc2a92284737327b5f36
sha256: f09f5c6f6763b2e3d478145e5bb240c31da819ddb0f1c4e08053d1a771375264
sha512: dccc2cd47a026e0fa48b49138813e33af4334987bb5110f6925af9a014402d54fc80ff6542abb1e6adbe46a6e9bf9c3b7c02725a1e452a3e376fbb3febd484d0
ssdeep: 24576:0vFQ5twUA8Pd0oJpXKP92JcK6Ci3GrMtetCsKENN/gjXVdzyz:0vFQ5B/PiGrMyBNNYLzyz
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1F445AF2378C9C5B8D3552C780D56EC38DB2AB2AB21264DC7F3D8473A4F76206D8475AE
sha3_384: dc01aea8f84a0a37a1d163c60f96dbcc47f2041ca107c8af07583b0c4941a4b947c7a7a43954f268432d5074935ac655
ep_bytes: e859530100e978feffffccccccccccdb
timestamp: 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.