Written by Robert Bailey
Spectating the TrojanDropper:Win32/Vundo.AB malware detection usually means that your PC is in big danger. This virus can correctly be named as ransomware – sort of malware which ciphers your files and forces you to pay for their decryption. Stopping it requires some unusual steps that must be done as soon as possible.
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TrojanDropper:Win32/Vundo.AB detection is a virus detection you can spectate in your computer. It frequently appears after the preliminary actions on your PC – opening the suspicious email messages, clicking the advertisement in the Internet or installing the program from suspicious sources. From the second it appears, you have a short time to do something about it before it begins its destructive action. And be sure – it is much better not to await these harmful actions.

What is TrojanDropper:Win32/Vundo.AB virus?

TrojanDropper:Win32/Vundo.AB is ransomware-type malware. It looks for the documents on your disk, ciphers it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your files locked, this virus additionally does a ton of harm to your system. It modifies the networking setups in order to prevent you from looking for the removal manuals or downloading the anti-malware program. In some cases, TrojanDropper:Win32/Vundo.AB can even stop the setup of anti-malware programs.

TrojanDropper:Win32/Vundo.AB Summary

In summary, TrojanDropper:Win32/Vundo.AB malware activities in the infected computer are next:

  • 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;
  • Ciphering the files located on the victim’s drive — so the victim cannot use these files;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of anti-virus apps

Ransomware has actually been a nightmare for the last 4 years. It is challenging to realize a more dangerous virus for both individual users and corporations. The algorithms utilized in TrojanDropper:Win32/Vundo.AB (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy already exists, and possibly will exist. However, that malware does not do all these bad things immediately – it can take up to a few hours to cipher all of your files. Thus, seeing the TrojanDropper:Win32/Vundo.AB detection is a clear signal that you have to start the removal procedure.

Where did I get the TrojanDropper:Win32/Vundo.AB?

General tactics of TrojanDropper:Win32/Vundo.AB distribution are standard for all other ransomware variants. Those are one-day landing websites where victims are offered to download the free program, so-called bait e-mails and hacktools. Bait e-mails are a pretty new method in malware distribution – you receive the email that simulates some normal notifications about shipments or bank service conditions modifications. Within the e-mail, there is a corrupted MS Office file, or a link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Avoiding it looks pretty simple, but still requires tons of awareness. Malware can hide in different places, and it is much better to stop it even before it goes into your computer than to depend on an anti-malware program. Basic cybersecurity awareness is just an important thing in the modern-day world, even if your interaction with a PC stays on YouTube videos. That can save you a great deal of time and money which you would spend while seeking a fix guide.

TrojanDropper:Win32/Vundo.AB malware technical details

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:

K7AntiVirusTrojan ( 0055dd191 )
K7GWTrojan ( 0055dd191 )
Elasticmalicious (high confidence)
ESET-NOD32a variant of Win32/Kryptik.BBVU
EmsisoftGen:Variant.Cerbu.98924 (B)
MAXmalware (ai score=85)
CynetMalicious (score: 99)
RisingDropper.Vundo!8.6BA (RDMK:cmRtazoew4l19HYiGngIzwEirDoH)
CrowdStrikewin/malicious_confidence_90% (W)

How to remove TrojanDropper:Win32/Vundo.AB?

TrojanDropper:Win32/Vundo.AB malware is very difficult to remove manually. It places its files in a variety of places throughout the disk, and can get back itself from one of the parts. Furthermore, a range of changes in the registry, networking settings and Group Policies are really hard to discover and change to the original. It is much better to make use of a specific program – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for virus elimination goals.

Why GridinSoft Anti-Malware? It is really light-weight and has its databases updated almost every hour. Moreover, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware perfect for eliminating malware of any form.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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