TrojanDownloader:Win32/Upatre

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

What is TrojanDownloader:Win32/Upatre infection?

In this short article you will certainly find regarding the interpretation of TrojanDownloader:Win32/Upatre and its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by online scams to demand paying the ransom by a victim.

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In the majority of the situations, TrojanDownloader:Win32/Upatre infection will certainly advise its sufferers to launch funds move for the objective of counteracting the changes that the Trojan infection has introduced to the sufferer’s tool.

TrojanDownloader:Win32/Upatre Summary

These adjustments can be as follows:

  • 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • Detected script timer window indicative of sleep style evasion;
  • A process attempted to delay the analysis task.;
  • 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.

  • A process created a hidden window;
  • 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.
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • Sniffs keystrokes;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Steals private information from local Internet browsers;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Creates a copy of itself;
  • Harvests information related to installed mail clients;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the files found on the victim’s disk drive — so the sufferer can no longer utilize the data;
  • Preventing routine access to the sufferer’s workstation;

TrojanDownloader:Win32/Upatre

One of the most regular networks whereby TrojanDownloader:Win32/Upatre are injected are:

  • By methods of phishing emails;
  • As a consequence of individual winding up on a source that holds a harmful software program;

As quickly as the Trojan is successfully infused, it will certainly either cipher the data on the target’s computer or protect against the device from functioning in a proper fashion – while likewise putting a ransom money note that mentions the requirement for the sufferers to effect the settlement for the objective of decrypting the records or recovering the file system back to the initial condition. In a lot of instances, the ransom note will certainly show up when the customer reboots the PC after the system has actually already been damaged.

TrojanDownloader:Win32/Upatre circulation networks.

In various corners of the world, TrojanDownloader:Win32/Upatre expands by jumps as well as bounds. However, the ransom money notes as well as techniques of obtaining the ransom money quantity may differ relying on specific local (local) settings. The ransom money notes and tricks of extorting the ransom quantity might vary depending on specific neighborhood (regional) setups.

Ransomware injection

As an example:

    Faulty alerts regarding unlicensed software.

    In certain locations, the Trojans commonly wrongfully report having actually identified some unlicensed applications enabled on the target’s device. The alert then requires the individual to pay the ransom.

    Faulty declarations regarding prohibited material.

    In nations where software piracy is less popular, this approach is not as reliable for the cyber fraudulences. Additionally, the TrojanDownloader:Win32/Upatre popup alert may wrongly declare to be stemming from a police organization and also will certainly report having situated child pornography or various other unlawful data on the gadget.

    TrojanDownloader:Win32/Upatre popup alert may falsely declare to be deriving from a law enforcement institution and also will certainly report having situated child pornography or various other unlawful data on the device. The alert will likewise include a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: 2352B08F
md5: 8cff71dfd38db9e5350881c91b68ddc0
name: 8CFF71DFD38DB9E5350881C91B68DDC0.mlw
sha1: c2d13f00135539c98efbe2e04a51b8bf272e2f6f
sha256: d3976665aec39fc9c9bff1188e8328304dbd95a6f990c760a14efadc1bca52d0
sha512: 7b1ff05c1bc4fba448a5403aa727ffc552fb3784b94ec0ce6a91bcb56eac0e7bedc143d207c14559530c34d4b83467c51dffc76c1542735a74478507a446971c
ssdeep: 12288:DaZWg+kN8Zm6DeWKX/JNwOCSjE5gjQTOEiPNd80ntgWtXpV6IqizM14Q3:DTxez2+bE
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 1999 - 2007 Speedbit Ltd.
InternalName: DAPShred
FileVersion: 8, 6, 0, 0
CompanyName: Speedbit Ltd.
PrivateBuild:
LegalTrademarks:
Comments:
ProductName: DAPShred Application
SpecialBuild:
ProductVersion: 8, 6, 0, 0
FileDescription: DAPShred MFC Application
OriginalFilename: DAPShred.EXE
Translation: 0x0409 0x04b0

TrojanDownloader:Win32/Upatre also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 005114d61 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop7.31019
Cynet Malicious (score: 85)
ALYac Gen:Variant.Bulz.8491
Cylance Unsafe
Zillya Trojan.Blocker.Win32.39072
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Blocker.bd403c1a
K7GW Trojan ( 005114d61 )
Cybereason malicious.fd38db
Cyren W32/Trojan.FXC.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Injector.SNB
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.kebf
BitDefender Gen:Variant.Bulz.8491
NANO-Antivirus Trojan.Win32.Blocker.eqsfnx
MicroWorld-eScan Gen:Variant.Bulz.8491
Tencent Win32.Trojan.Blocker.Efvj
Ad-Aware Gen:Variant.Bulz.8491
Sophos Mal/Generic-S
BitDefenderTheta Gen:NN.ZemsilF.34608.Ym0@aeeTB0oi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.cm
FireEye Generic.mg.8cff71dfd38db9e5
Emsisoft Gen:Variant.Bulz.8491 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_99%
Microsoft TrojanDownloader:Win32/Upatre
Arcabit Trojan.Bulz.D212B
AegisLab Trojan.Win32.Generic.lx9E
GData Gen:Variant.Bulz.8491
McAfee GenericRXCD-LG!8CFF71DFD38D
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Malwarebytes Malware.AI.4077106763
Panda Trj/GdSda.A
Rising Stealer.Fareit!8.170 (CLOUD)
Ikarus Trojan.MSIL.RPX
Fortinet MSIL/Injector.SNB!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASOQA

How to remove TrojanDownloader:Win32/Upatre ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

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 TrojanDownloader:Win32/Upatre 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove TrojanDownloader:Win32/Upatre 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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