What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the Worm:Win32/Gamarue.AN detection usually means that your system is in big danger. This virus can correctly be identified as ransomware – sort of malware which ciphers your files and asks you to pay for their decryption. Deleteing it requires some peculiar steps that must be taken as soon as possible.
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Worm:Win32/Gamarue.AN detection is a malware detection you can spectate in your computer. It usually appears after the preliminary procedures on your computer – opening the dubious email, clicking the banner in the Web or mounting the program from dubious resources. From the instance it appears, you have a short time to do something about it before it begins its harmful action. And be sure – it is better not to wait for these malicious things.

What is Worm:Win32/Gamarue.AN virus?

Worm:Win32/Gamarue.AN is ransomware-type malware. It looks for the files on your computer, ciphers it, and after that asks you to pay the ransom for getting the decryption key. Besides making your files inaccessible, this malware also does a ton of damage to your system. It alters the networking setups in order to prevent you from checking out the removal manuals or downloading the antivirus. In rare cases, Worm:Win32/Gamarue.AN can also stop the launching of anti-malware programs.

Worm:Win32/Gamarue.AN Summary

Summarizingly, Worm:Win32/Gamarue.AN virus actions in the infected PC are next:

  • 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;
  • Dynamic (imported) function loading detected;
  • Enumerates running processes;
  • Expresses interest in specific running processes;
  • CAPE extracted potentially suspicious content;
  • Unconventionial binary language: Russian;
  • Unconventionial language used in binary resources: Arabic (Syria);
  • The binary likely contains encrypted or compressed data.;
  • Removes Security and Maintenance icon from Start menu, Taskbar and notifications;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (Process Hollowing);
  • Executed a process and injected code into it, probably while unpacking;
  • Exhibits behavior characteristic of Andromeda/Gamarue malware;
  • Deletes its original binary from disk;
  • Behavioural detection: Injection (inter-process);
  • Attempts to stop active services;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • Installs itself for autorun at Windows startup;
  • CAPE detected the Andromeda malware family;
  • Attempts to disable UAC;
  • Unusual version info supplied for binary;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Attempts to modify user notification settings;
  • Ciphering the documents located on the target’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-malware apps

Ransomware has been a horror story for the last 4 years. It is challenging to picture a more dangerous malware for both individual users and companies. The algorithms utilized in Worm:Win32/Gamarue.AN (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have more time than our galaxy actually exists, and possibly will exist. However, that malware does not do all these terrible things immediately – it may require up to a few hours to cipher all of your documents. Thus, seeing the Worm:Win32/Gamarue.AN detection is a clear signal that you need to begin the removal procedure.

Where did I get the Worm:Win32/Gamarue.AN?

General methods of Worm:Win32/Gamarue.AN injection are typical for all other ransomware examples. Those are one-day landing sites where users are offered to download and install the free app, so-called bait emails and hacktools. Bait e-mails are a quite modern tactic in malware spreading – you receive the email that simulates some routine notifications about deliveries or bank service conditions shifts. Inside of the email, there is an infected MS Office file, or a web 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 fairly simple, but still needs a lot of attention. Malware can hide in various spots, and it is better to stop it even before it gets into your PC than to trust in an anti-malware program. Simple cybersecurity awareness is just an important item in the modern-day world, even if your interaction with a PC stays on YouTube videos. That can keep you a great deal of time and money which you would certainly spend while searching for a solution.

Worm:Win32/Gamarue.AN malware technical details

File Info:

name: DBCF6D36BD7EEDBB2CD7.mlw
path: /opt/CAPEv2/storage/binaries/d7abcf8bc25843b59ad6afba686bd32e0b34f3486edca033495ecec1c1416b8c
crc32: 4CBB90BC
md5: dbcf6d36bd7eedbb2cd7720b39960c7f
sha1: 56f29db2016122359d1d8a71bcbb06573f0350c1
sha256: d7abcf8bc25843b59ad6afba686bd32e0b34f3486edca033495ecec1c1416b8c
sha512: 963a7711cd4aa2d60486e7fb0d9f05e193073655c9426336f813c905c0cf6cd917ee72c20c6560ae9a0d093a99fbfb8e1b939c09d2bb0ba86cb64d75e7ee7117
ssdeep: 1536:8KIB3GOEsRZYlFww57h30CktP9vyO/S6HTVyAobKhOCtyvR8LnGWCH7aEKvQ:8rB3GDsRZOZQ9vd/3HRy0Ov8LnIaRvQ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1E8A39D16B770CCF2C0551C34A2E4B2725D2EAF38E666B743BB75BB2A5E312805529337
sha3_384: 17534074372698193237ac3a9a486950dc35c6ecb6a97b5ad6e885072cbe3925705635d45dae0176343934653e232693
ep_bytes: e812450000e978feffff8bff558bec8b
timestamp: 2014-10-11 17:50:28

Version Info:

CompanyName: Корпорация Майкрософт
FileDescription: Microsoft (R) .NET Framework - служебная программа глобального кэша сборок
FileVersion: 3.5.21022.8 (RTM.021022-0800)
InternalName: gacutil.exe
LegalCopyright: © Корпорация Майкрософт (Microsoft Corporation). Все права защищены.
OriginalFilename: gacutil.exe
ProductName: Microsoft® .NET Framework
ProductVersion: 3.5.21022.8
Comments: Flavor=Retail
PrivateBuild: DDBLD634
Translation: 0x0419 0x04b0

Worm:Win32/Gamarue.AN also known as:

Elasticmalicious (high confidence)
CynetMalicious (score: 100)
K7AntiVirusTrojan ( 004cef571 )
K7GWTrojan ( 004cef571 )
CrowdStrikewin/malicious_confidence_70% (W)
ESET-NOD32a variant of Win32/Injector.BNKW
AvastWin32:Androp [Drp]
EmsisoftTrojan.Lethic.Gen.1 (B)
SophosML/PE-A + Mal/Wonton-J
MAXmalware (ai score=100)
RisingWorm.Gamarue!8.13B (CLOUD)
AVGWin32:Androp [Drp]

How to remove Worm:Win32/Gamarue.AN?

Worm:Win32/Gamarue.AN malware is incredibly difficult to delete by hand. It puts its files in several locations throughout the disk, and can recover itself from one of the parts. Additionally, various modifications in the registry, networking setups and also Group Policies are pretty hard to locate and revert to the initial. It is much better to use a specific tool – exactly, an anti-malware program. GridinSoft Anti-Malware will fit the most ideal for virus elimination reasons.

Why GridinSoft Anti-Malware? It is very light-weight and has its detection databases updated almost every hour. Furthermore, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware suitable for removing 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

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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