Overview

overview

10

Static

static

10

regsvr32.exe

windows10-2004-x64

10

regsvr32.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    regsvr32.exe
  • Size 3.1MB
  • Sample260414-tbvgdsft7k
  • SHA256 719ffb04bf9228c2434038ed4cc6189af927c849afb7106d827ad76e6ba8f45f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
regsvrhosttrojanspywarequasar

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • RegSvrHost

C2

  • trainingmatters.uk.com:4782

  • www.trainingmatters.uk.com:4782

  • 104.21.1.215:4782

Mutex

  • Regsvr32InstanceMutex_cbab5072-7de1-4784-852e-2cedd853a79e

Attributes
  • encryption_key

    2DA8E1B5D18EAA4561218BCAF7CC51C403CE73ED

  • install_name

    regsvr32.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    regsvr32.exe

  • subdirectory

    Host

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 1 IoCs
  • Unsigned PE 1 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • regsvr32.exe
    .exe 3.1MB

regsvr32.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 719ffb04bf9228c2434038ed4cc6189af927c849afb7106d827ad76e6ba8f45f
  • MD5 SHA1 SHA512 SSDEEP TLSH
windows:4windowsx86arch:x86

  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
3269774
Magic Number
267
Subsystem
IMAGE_SUBSYSTEM_WINDOWS_GUI
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_NO_SEH IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_32BIT_MACHINE
PDB paths