Threat Database Trojans Trojan.Downloader.MH

Trojan.Downloader.MH

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Popularity Rank: 16,869
Threat Level: 80 % (High)
Infected Computers: 4
First Seen: September 25, 2026
Last Seen: October 11, 2026
OS(es) Affected: Windows

Trojan.Downloader.MH is a Trojan horse infection, a type of malicious software that disguises itself as something harmless or useful while secretly carrying out damaging actions in the background. As its name suggests, this particular threat belongs to the downloader subclass of Trojans, meaning its primary purpose is to quietly fetch and install additional malicious components onto an infected computer without the user's knowledge or consent.

What Trojan.Downloader.MH Does

Like other downloader Trojans, Trojan.Downloader.MH typically does not cause visible damage on its own. Instead, it acts as a delivery mechanism, establishing a connection to a remote server controlled by cybercriminals and silently downloading other malicious payloads onto the compromised system. These secondary infections can include additional Trojans, ransomware, spyware, adware, or other unwanted programs, depending on what the attackers behind the campaign intend to achieve. Because it operates quietly in the background, Trojan.Downloader.MH is designed to avoid drawing attention to itself while it performs its download-and-install routine.

How It Usually Gets Onto Computers

Downloader Trojans like this one typically spread through deceptive and social engineering tactics common to this category of malware. Common infection methods include malicious email attachments disguised as invoices, receipts, or official documents, links embedded in phishing emails, compromised or malicious websites, fake software updates, cracked or pirated software downloads, and bundling with other free programs obtained from untrustworthy sources. Users are often tricked into manually executing the infected file, believing it to be legitimate, which allows the Trojan to install itself without triggering obvious warning signs.

Risks for the User

The danger of a downloader Trojan lies not just in its own presence but in what it brings with it. Once Trojan.Downloader.MH establishes itself on a system, it can open the door to a wide range of secondary threats, each carrying its own risks. These may include theft of personal and financial information, unauthorized remote access to the infected machine, encryption of files for ransom, degraded system performance, and further compromise of privacy and security. Because the downloaded payloads can vary, the overall risk profile of an infection can escalate quickly and unpredictably once the Trojan is active.

Signs of Infection

Trojans in this category are built to operate stealthily, so visible symptoms may be minimal or absent. However, users may notice certain warning signs, such as unexplained slowdowns in system performance, unusual network activity or increased data usage, unfamiliar programs or processes appearing on the system, changes to browser settings or new toolbars, frequent crashes or freezes, and security tools being disabled or malfunctioning unexpectedly. The presence of unfamiliar files or startup entries can also indicate that a downloader Trojan has been active on the machine.

How to Stay Protected

Protecting against threats like Trojan.Downloader.MH requires a combination of caution and good digital hygiene. Users should avoid opening email attachments or clicking links from unknown or unexpected senders, refrain from downloading software from unofficial or pirated sources, keep operating systems and applications updated with the latest security patches, and use reputable security software to scan downloads before execution. Regularly backing up important files, exercising skepticism toward unsolicited pop-ups or update prompts, and being cautious when granting permissions to downloaded programs can further reduce the risk of falling victim to this type of Trojan.

Analysis Report

General information

Family Name: Trojan.Downloader.MH
Signature status: No Signature

Known Samples

MD5: 9c3601982f0c71e940d4b61893486bfd
SHA1: 2cc1978ace5804eadc4bc00b08f03cc1de82381b
SHA256: 6CA9AA04A5503CDBAE4B8E1FED35FC6617C3707057763726B4338F7296F75D55
File Size: 219.14 KB, 219136 bytes
MD5: 01b73e7719460cfdc7c995dff9d3ed2b
SHA1: da83ebbbd20032045bc46689a186f40b7dd5fee8
SHA256: C0A7F87D388A875D1188C9DB3E880AA07C28AEE689A25B5AF133127D4C1A9627
File Size: 478.21 KB, 478208 bytes
MD5: 14649e768e481d5b9a691dc4d3b2365f
SHA1: a6624be6d5fb4adbeef47b50c4f0aae128487c82
SHA256: 3FD4AF3E142E473D7FCF1213C439886B637AEC1622F10BF29B1D0BCED781BCD8
File Size: 478.21 KB, 478208 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have security information
  • File has TLS information
  • File is 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • File is not packed
Show More
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • big overlay
  • No Version Info
  • x64

Block Information

Total Blocks: 910
Potentially Malicious Blocks: 19
Whitelisted Blocks: 890
Unknown Blocks: 1

Visual Map

0 0 0 0 0 0 0 ? x x x x x x x 0 0 0 x 0 0 x x x x x x x x x x x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Downloader.Agent.DTA
  • Downloader.Agent.DTC
  • Downloader.MH
  • Trojan.Agent.Gen.AIQ
  • Trojan.Agent.Gen.GKN

Files Modified

File Attributes
c:\users\user\appdata\local\microsoft\windows\caches Synchronize,Write Attributes
c:\users\user\appdata\local\microsoft\windows\update Synchronize,Write Attributes

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtWriteFile
  • UNKNOWN