Win32/Packed.Themida.BCK

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Win32/Packed.Themida.BCK infection?

In this post you will find about the meaning of Win32/Packed.Themida.BCK and its unfavorable impact on your computer. Such ransomware are a form of malware that is clarified by on-line scams to demand paying the ransom by a target.

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In the majority of the cases, Win32/Packed.Themida.BCK ransomware will instruct its victims to launch funds transfer for the objective of neutralizing the amendments that the Trojan infection has actually presented to the victim’s device.

Win32/Packed.Themida.BCK Summary

These alterations can be as adheres to:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • A process attempted to delay the analysis task.;
  • Expresses interest in specific running processes;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Checks for the presence of known windows from debuggers and forensic tools;
  • The following process appear to have been packed with Themida: intervpnmix.exe;
  • Writes a potential ransom message to disk;
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Detects the presence of Wine emulator via registry key;
  • Checks the version of Bios, possibly for anti-virtualization;
  • Detects VirtualBox through the presence of a registry key;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the sufferer’s hard drive — so the sufferer can no longer utilize the data;
  • Preventing normal access to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains
iplogger.orgTR/Ransom.vbhzq
jload09.infoTR/Ransom.vbhzq

Win32/Packed.Themida.BCK

One of the most regular channels through which Win32/Packed.Themida.BCK Trojans are injected are:

  • By ways of phishing emails;
  • As a consequence of individual ending up on a resource that organizes a destructive software application;

As soon as the Trojan is effectively injected, it will either cipher the information on the sufferer’s PC or avoid the tool from operating in a correct fashion – while additionally putting a ransom note that mentions the demand for the sufferers to effect the payment for the function of decrypting the documents or bring back the documents system back to the initial problem. In most circumstances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has already been harmed.

Win32/Packed.Themida.BCK circulation networks.

In numerous corners of the globe, Win32/Packed.Themida.BCK grows by jumps and bounds. Nonetheless, the ransom money notes as well as techniques of obtaining the ransom quantity may differ relying on certain neighborhood (regional) setups. The ransom notes and also techniques of extorting the ransom money quantity may differ depending on particular regional (regional) setups.

Ransomware injection

As an example:

    Faulty signals regarding unlicensed software.

    In certain locations, the Trojans frequently wrongfully report having actually found some unlicensed applications enabled on the target’s device. The alert after that requires the individual to pay the ransom.

    Faulty statements regarding illegal content.

    In nations where software program piracy is less preferred, this approach is not as efficient for the cyber fraudulences. Conversely, the Win32/Packed.Themida.BCK popup alert might incorrectly claim to be originating from a law enforcement organization and will report having situated youngster porn or various other unlawful information on the tool.

    Win32/Packed.Themida.BCK popup alert may incorrectly assert to be deriving from a legislation enforcement establishment and also will report having located child porn or other illegal information on the tool. The alert will likewise have a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: AC2D99D3
md5: 4efa30519b6143c4180397976d284bce
name: intervpnmix.exe
sha1: 33a9ffd4e4ed216534c9f92503e9d4eb1fce5e86
sha256: 9c1f09b7d61670e53866d78ce5d58a87a5d518c67c51f2e67ce91bb517b523de
sha512: 4468f2fdab68ca21fdb43ebcd4a72d5d7845ff3e9f7cb8ee501da98bf645501a94d50eb85b529716cf414256412066c9dafea5d1d4f67bcfaa484142e7751672
ssdeep: 196608:k5G3oFXzSHflKvlz/1tcko57xBTJu7sbsNaUSd7gcN/9e4E8tnSmgI:kA3oFXzGflK9z17stlwaUwle4EghgI
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Inter VPN SOFT Inc.
ProductVersion: 2.2.1.0
FileVersion: 2.2.1.0
FileDescription:
Translation: 0x0000 0x04b0

Win32/Packed.Themida.BCK also known as:

GridinSoftTrojan.Ransom.Gen
MicroWorld-eScanTrojan.GenericKD.42842857
McAfeeArtemis!4EFA30519B61
CylanceUnsafe
ZillyaTrojan.GenericKD.Win32.30057
SangforMalware
K7AntiVirusTrojan ( 0053a1a81 )
BitDefenderTrojan.GenericKD.42842857
K7GWTrojan ( 0053a1a81 )
TrendMicroTROJ_GEN.R01FC0WCE20
APEXMalicious
AvastWin32:Trojan-gen
ClamAVWin.Malware.Stralo-7590910-0
GDataTrojan.GenericKD.42842857
KasperskyTrojan-PSW.Win32.Coins.vrh
AlibabaTrojanPSW:Win32/Coins.3a4a9090
AegisLabTrojan.Win32.Generic.j!c
RisingTrojan.Generic@ML.100 (RDML:kosLBhtPsSo+/9AzHv3XZQ)
Endgamemalicious (high confidence)
EmsisoftTrojan.GenericKD.42842857 (B)
ComodoMalware@#is7n73ihzjt8
F-SecureHeuristic.HEUR/AGEN.1038489
DrWebTrojan.DownLoad4.13651
McAfee-GW-EditionBehavesLike.Win32.Dropper.rc
SophosMal/Generic-S
IkarusTrojan-Downloader.Win32.Autohk
CyrenW32/Trojan.DAXT-4206
AviraTR/Ransom.vbhzq
eGambitUnsafe.AI_Score_99%
MAXmalware (ai score=87)
MicrosoftTrojan:Win32/Occamy.C
ArcabitTrojan.Generic.D28DBAE9
ZoneAlarmHEUR:Trojan-Downloader.Win32.Stralo.gen
AhnLab-V3Malware/Win32.Generic.C4009781
Acronissuspicious
ALYacTrojan.GenericKD.42842857
Ad-AwareTrojan.GenericKD.42842857
MalwarebytesTrojan.Downloader.AHK.Themida
PandaTrj/CI.A
ESET-NOD32a variant of Win32/Packed.Themida.BCK
TrendMicro-HouseCallTROJ_GEN.R01FC0WCE20
TencentWin32.Trojan-qqpass.Qqrob.Piuk
YandexRiskware.Unwanted!
MaxSecureTrojan.Malware.74705991.susgen
FortinetW32/Coins.VRH!tr.pws
AVGWin32:Trojan-gen
Qihoo-360Win32/Trojan.PSW.deb

How to remove Win32/Packed.Themida.BCK ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Win32/Packed.Themida.BCK files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove Win32/Packed.Themida.BCK you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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