Threat Database Backdoors Backdoor.Remcos.HF

Backdoor.Remcos.HF

By CagedTech in Backdoors

Threat Scorecard

Popularity Rank: 18,543
Threat Level: 60 % (Medium)
Infected Computers: 22
First Seen: May 30, 2023
Last Seen: March 25, 2026
OS(es) Affected: Windows

Analysis Report

General information

Family Name: Backdoor.Remcos.HF
Signature status: No Signature

Known Samples

MD5: 301d5c00da25ba3a241e5e045c28ab92
SHA1: de9ffcff48fab6c04f08d0a222213bf02e7da780
SHA256: B219736E23EC0901C175B051CF4817492342FFABAE808C357EFCD711F3800ED8
File Size: 303.62 KB, 303616 bytes
MD5: 5dd54dc199eb229a8342b62d463f8bef
SHA1: 69a0d206c46293d1f5a065cde99b4f018d491f1c
SHA256: CEF3001AD08D36F66B360EFC96650B47313A3179FFDB850AC117D0E3201F4AC6
File Size: 476.67 KB, 476672 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have exports table
  • File doesn't have security information
  • File has TLS information
  • File is 32-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
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
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  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • HighEntropy
  • No Version Info
  • WriteProcessMemory
  • x86

Block Information

Total Blocks: 2,137
Potentially Malicious Blocks: 810
Whitelisted Blocks: 1,327
Unknown Blocks: 0

Visual Map

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x 0 x 0 0 0 0 0 x 0 0 0 0 0 0 0 0 0 x 0 0 0 x 0 x 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 x 0 0 0 0 0 0 0 0 0 0 0 0 x x 0 0 x x 0 0 0 0 0 0 0 x x x x x x 0 0 0 0 0 0 0 0 0 x 0 0 0 0 0 0 x 0 0 0 0 0 x x 0 x x x x 0 x x 0 0 0 0 x x x x 0 0 0 0 x 0 0 x x x x x x x x x x x x x x x x x x 0 x x x 0 0 0 x x x x x x 0 x 0 0 x x x x x x x x 0 x x x 0 0 0 0 x 0 x 0 0 x 0 x x x x x x 0 0 0 0 0 0 0 x x x x x x x x x x 0 0 x 0 0 x x x x x x x 0 0 x 0 x 0 0 0 0 x 0 x x x x x 0 x x 0 x x x 0 0 0 0 0 x 0 x 0 x 1 x 0 x x 0 x x x x x x x x x x x x x x x x x x x x x x x x 0 0 0 0 x 0 0 x x x x x x x x 0 x x x x x x x x x x x x 0 0 0 x x x 0 0 0 0 0 x x 0 x 0 0 0 x 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 x 0 0 0 0 0 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 x x x 0 x x x 0 0 0 0 x x 0 0 0 0 0 0 0 0 0 x 0 x x x x x 0 0 0 0 0 x 0 0 x x x 0 x x 0 0 x 0 0 0 0 0 0 0 x x 0 x x 0 x 0 0 0 0 0 0 0 0 0 x 0 0 0 0 0 0 0 0 0 0 0 x 0 0 x x 0 x x 0 x x 0 0 x 0 x 0 x x x x x 0 x x 0 x x x x x 0 0 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 x 0 0 0 0 x x x x 0 x x x x x x x 0 x x x x x x x x 0 x 0 0 0 0 0 0 x x x x 0 x x x x x x x 0 x x x x x x x x x x x x x x x x x x x x 0 x x x x x 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 x x x x x x x x x x x 0 x x 0 x x x 0 0 x x 0 0 0 0 x x 0 x x x x 0 x x x x x 0 0 0 x x x 0 0 x x 0 0 x 0 x x x 0 0 x 0 x x x x x x x x x x 0 x x x x x x 0 x 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 x x x x x x x x x x x x x x x x 0 0 x x x x x 0 x x x x x x x x x 0 x x x x x x 0 x x x x x x x 0 x x x 0 x x x x x x x x x x 0 x x x x x x x x x x x x x x x x x x 0 x x x x x x x 0 0 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 0 x x 0 x x x x x x x x x x x x 0 x x x x x x x x x x x x x x x x x x x x 0 0 x x x 0 x x x x x x x x x x x x x x x x x x x x x x 0 0 x x x x x x x 0 0 x x x x x x x x x 0 x x x x x x x x x x x x x x x x x x x x 0 x x x x x x x x x 0 0 x x x 0 x x 0 x x x x 0 0 0 x x x x x x 0 x x x x x x x x x x x x x x x x x x x x x 0 x x x x x x 0 x x x x x x x x x x x x x 0 x 0 x 0 x 0 0 x x x x x x x x 0 0 x 0 x x 0 0 x 0 x x x 0 0 x x x x x x x x x x 0 0 0 x x 0 x x 0 x 0 x 0 x x x x 0 x 0 x x x x x x x 0 x x 0 x x x x x 0 0 0 x x x x x x x x x x 0 x x x x x x x x x x x x x x x x 0 x x 0 0 0 0 0 0 x x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 2 2 0 0 2 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 1 1 1 1 0 2 2 1 0 0 1 0 0 0 1 1 0 1 0 1 0 0 0 0 0 0
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Filecoder.JD
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Show More
  • Remcos.HD
  • Remcos.HF
  • Remcos.HG
  • Remcos.HH
  • Remcos.HK

Files Modified

File Attributes
c:\windows\com surrogate.exe Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144
c:\windows\com surrogate.exe Synchronize,Write Attributes

Registry Modifications

Key::Value Data API Name
HKLM\software\microsoft\windows\currentversion\policies\explorer\run::pworstrtsf-lcr1fe "C:\Windows\COM Surrogate.exe" RegNtPreCreateKey

Windows API Usage

Category API
Anti Debug
  • IsDebuggerPresent
User Data Access
  • GetUserObjectInformation
Process Manipulation Evasion
  • ReadProcessMemory

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