Trojan-Downloader.Win32.BadOffer

Written by Robert Bailey

What is Trojan-Downloader.Win32.BadOffer infection?

In this short article you will certainly locate about the meaning of Trojan-Downloader.Win32.BadOffer and its negative influence on your computer. Such ransomware are a type of malware that is clarified by online scams to require paying the ransom by a target.

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Most of the instances, Trojan-Downloader.Win32.BadOffer infection will instruct its victims to start funds transfer for the function of neutralizing the changes that the Trojan infection has introduced to the target’s tool.

Trojan-Downloader.Win32.BadOffer Summary

These adjustments can be as complies with:

  • 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);
  • Compression (or decompression);
  • 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.
  • Attempts to connect to a dead IP:Port (6 unique times);
  • 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.

  • 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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Russian;
  • Uses Windows utilities for basic functionality;
  • Forces a created process to be the child of an unrelated process;
  • Executed a process and injected code into it, probably while unpacking;
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • 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;
  • Steals private information from local Internet browsers;
  • Network activity contains more than one unique useragent.;
  • 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.
  • Attempts to identify installed AV products by installation directory;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • 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.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers found on the sufferer’s hard drive — so the sufferer can no longer utilize the information;
  • Preventing routine accessibility to the victim’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
gclean.biz HEUR:Trojan-Ransom.Win32.Stop.gen
g-cleanpartners.in HEUR:Trojan-Ransom.Win32.Stop.gen
email.yg9.me HEUR:Trojan-Ransom.Win32.Stop.gen
ip-api.com HEUR:Trojan-Ransom.Win32.Stop.gen
iw.gamegame.info HEUR:Trojan-Ransom.Win32.Stop.gen
ol.gamegame.info HEUR:Trojan-Ransom.Win32.Stop.gen
rogpfk08.top HEUR:Trojan-Ransom.Win32.Stop.gen
nailedpizza.top HEUR:Trojan-Ransom.Win32.Stop.gen
iplogger.org HEUR:Trojan-Ransom.Win32.Stop.gen
tttttt.me HEUR:Trojan-Ransom.Win32.Stop.gen
apps.identrust.com HEUR:Trojan-Ransom.Win32.Stop.gen

Trojan-Downloader.Win32.BadOffer

The most regular channels whereby Trojan-Downloader.Win32.BadOffer Trojans are infused are:

  • By means of phishing emails;
  • As a repercussion of user ending up on a source that hosts a destructive software program;

As quickly as the Trojan is successfully infused, it will either cipher the information on the victim’s PC or prevent the gadget from working in a proper manner – while likewise putting a ransom note that discusses the demand for the victims to effect the repayment for the objective of decrypting the papers or recovering the file system back to the first condition. In a lot of instances, the ransom note will turn up when the client restarts the PC after the system has already been harmed.

Trojan-Downloader.Win32.BadOffer circulation networks.

In different corners of the world, Trojan-Downloader.Win32.BadOffer grows by jumps as well as bounds. Nonetheless, the ransom notes and methods of obtaining the ransom money quantity might differ depending upon certain regional (local) setups. The ransom notes and also techniques of obtaining the ransom money amount might differ depending on particular local (regional) settings.

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software program.

    In specific areas, the Trojans usually wrongfully report having actually discovered some unlicensed applications enabled on the target’s tool. The alert then requires the customer to pay the ransom money.

    Faulty declarations regarding unlawful content.

    In countries where software application piracy is much less prominent, this method is not as efficient for the cyber scams. Conversely, the Trojan-Downloader.Win32.BadOffer popup alert may falsely declare to be stemming from a law enforcement organization as well as will certainly report having located youngster pornography or other illegal information on the device.

    Trojan-Downloader.Win32.BadOffer popup alert might falsely declare to be acquiring from a law enforcement institution and also will certainly report having situated child porn or various other prohibited data on the device. The alert will likewise contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 19F5804D
md5: 138f1e886df537f014b2d4a74efb57d3
name: 138F1E886DF537F014B2D4A74EFB57D3.mlw
sha1: e8afa62e61b40c2a013d90f77c5cf485f6a2e8d9
sha256: 7d2aa440d1865ca2262908dbb3102194d0fd77117b2b3ea0af9de8cc21d1e394
sha512: af23ba255c1446b21553fbd9fca8def7b095959732ca326815c635a4616c92817e070766bc18072c622ff480365e4eb488cac843f4f63c2eaaef1a8600846e4f
ssdeep: 49152:pAI+Y4rOwdlovusbBIY+KvRGsKh7RLSIzoQnuBp9yCur:pAI+BawobBIYD87RLSIXub9yb
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Company
FileDescription: NewProduct 1.00 Installation
FileVersion: 1.00
Comments:
CompanyName: Company
Translation: 0x0409 0x04e4

Trojan-Downloader.Win32.BadOffer also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0057cfac1 )
DrWeb Trojan.MulDrop16.31196
Cynet Malicious (score: 99)
CAT-QuickHeal Trojandownloader.Badoffer
ALYac Trojan.GenericKD.46352144
Cylance Unsafe
CrowdStrike win/malicious_confidence_90% (W)
Alibaba TrojanDownloader:Win32/Azorult.5388d722
K7GW Trojan ( 0057cfac1 )
Cyren W32/Kryptik.EED.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 multiple detections
APEX Malicious
Avast Win32:MalOb-FE [Cryp]
Kaspersky HEUR:Trojan-Downloader.Win32.BadOffer.gen
BitDefender Trojan.GenericKDZ.75499
NANO-Antivirus Virus.Win32.Gen-Crypt.ccnc
SUPERAntiSpyware Trojan.Agent/Gen-Dropper
MicroWorld-eScan Trojan.GenericKD.46367633
Tencent Win32.Trojan-downloader.Badoffer.Dxdn
Sophos Generic ML PUA (PUA)
BitDefenderTheta Gen:NN.ZexaF.34692.vuW@aWSZbgfG
McAfee-GW-Edition BehavesLike.Win32.BadFile.tc
FireEye Generic.mg.138f1e886df537f0
Emsisoft Trojan.GenericKDZ.75499 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira TR/AD.Chapak.vfmim
eGambit Unsafe.AI_Score_99%
Microsoft Trojan:Win32/Azorult.RW!MTB
Gridinsoft Trojan.Win32.CoinMiner.vb!s8
Arcabit Trojan.Generic.D2343658
ZoneAlarm HEUR:Trojan-Ransom.Win32.Stop.gen
GData Trojan.GenericKD.36976216
McAfee Artemis!138F1E886DF5
MAX malware (ai score=83)
Panda Trj/CI.A
Rising Trojan.Generic@ML.89 (RDML:BTuv/KK61ykVXnxQAPyiew)
Yandex Trojan.Blocker!OH3Aj8L7MuI
Ikarus Trojan-Spy.Win32.QuStealer
MaxSecure Trojan-Ransom.Win32.Crypmod.zfq
Fortinet W32/Stop.B!tr
AVG Win32:MalOb-FE [Cryp]

How to remove Trojan-Downloader.Win32.BadOffer virus?

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

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 Trojan-Downloader.Win32.BadOffer 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 Trojan-Downloader.Win32.BadOffer 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: http://gridinsoft.com/products/

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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