Overview

overview

10

Static

static

3

VirusShare...7b.exe

windows10-2004-x64

10

VirusShare...7b.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/04/2025, 14:21

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General

  • Target

    VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe

  • Size

    64KB

  • MD5

    4aa5734fe9c86184f931f4ddaf2d4d7b

  • SHA1

    a066ccad76f3c63d053cd68ac8692d4f4acf82ac

  • SHA256

    2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

  • SHA512

    7355ffd3fc59af49af1d57f5327c7442a12c8e5ddc6ec9e176cc27fd4986cd6182f5f6ce91f892c07029efcac37f90d4dd077b6bb226b54c40621b94987a044c

  • SSDEEP

    384:rdP9JIA7uJ1wK2xBpHbVbl+NGYD90pSCfZziEKffhaekBfdReVwoGHdRsArr2rOR:R9JIqNl/SSrrpBfiIdRsorZucnjtsq

Score
10/10
guloaderdiscoverydownloaderpersistence

Malware Config

Extracted

Family

guloader

C2

https://eficadgdl.com/well/Omitted-Credentials_encrypted_6A17930.bin

xor.base64

Signatures

  • Guloader family
    guloader
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies registry class 64 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
    "C:\Users\Admin\AppData\Local\Temp\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1344
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      PID:2368
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3228
    • C:\Users\Admin\TROFFE\erythroph.exe
      C:\Users\Admin\TROFFE\erythroph.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2468
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        C:\Users\Admin\TROFFE\erythroph.exe
        3⤵
        • Adds Run key to start application
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • System Location Discovery: System Language Discovery
        PID:4688
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4740
    • C:\Users\Admin\TROFFE\erythroph.exe
      C:\Users\Admin\TROFFE\erythroph.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5000
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        C:\Users\Admin\TROFFE\erythroph.exe
        3⤵
        • Adds Run key to start application
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • System Location Discovery: System Language Discovery
        PID:3540
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5956
    • C:\Users\Admin\TROFFE\erythroph.exe
      C:\Users\Admin\TROFFE\erythroph.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5936
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        C:\Users\Admin\TROFFE\erythroph.exe
        3⤵
          PID:4916
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
          C:\Users\Admin\TROFFE\erythroph.exe
          3⤵
          • Adds Run key to start application
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • System Location Discovery: System Language Discovery
          PID:4924
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:2712
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:5968

      Network

      MITRE ATT&CK Enterprise v16

      Replay Monitor

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      Downloads

      • C:\Users\Admin\TROFFE\erythroph.exe
        Filesize

        64KB

        MD5

        4aa5734fe9c86184f931f4ddaf2d4d7b

        SHA1

        a066ccad76f3c63d053cd68ac8692d4f4acf82ac

        SHA256

        2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

        SHA512

        7355ffd3fc59af49af1d57f5327c7442a12c8e5ddc6ec9e176cc27fd4986cd6182f5f6ce91f892c07029efcac37f90d4dd077b6bb226b54c40621b94987a044c

        Download Submit

      • memory/1344-21-0x00000000022B0000-0x00000000022B8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/1344-3-0x0000000077091000-0x00000000771B1000-memory.dmp

        Filesize

        1.1MB

        Download

      • memory/1344-175-0x00000000022B0000-0x00000000022B8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/1344-22-0x0000000077091000-0x00000000771B1000-memory.dmp

        Filesize

        1.1MB

        Download

      • memory/1344-2-0x00000000022B0000-0x00000000022B8000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2368-4-0x0000000001100000-0x0000000001200000-memory.dmp

        Filesize

        1024KB

        Download

      • memory/2368-5-0x0000000077091000-0x00000000771B1000-memory.dmp

        Filesize

        1.1MB

        Download

      • memory/2368-23-0x0000000001100000-0x0000000001200000-memory.dmp

        Filesize

        1024KB

        Download

      • memory/2468-13-0x0000000077091000-0x00000000771B1000-memory.dmp

        Filesize

        1.1MB

        Download

      • memory/2468-24-0x0000000002160000-0x0000000002168000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2468-12-0x0000000002160000-0x0000000002168000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2468-176-0x0000000002160000-0x0000000002168000-memory.dmp

        Filesize

        32KB

        Download

      • memory/2712-44-0x000002A1F6DA0000-0x000002A1F6DC0000-memory.dmp

        Filesize

        128KB

        Download

      • memory/2712-32-0x000002A1F6DE0000-0x000002A1F6E00000-memory.dmp

        Filesize

        128KB

        Download

      • memory/2712-63-0x000002A1F74B0000-0x000002A1F74D0000-memory.dmp

        Filesize

        128KB

        Download

      • memory/4688-14-0x0000000001300000-0x0000000001400000-memory.dmp

        Filesize

        1024KB

        Download

      • memory/4688-25-0x0000000001300000-0x0000000001400000-memory.dmp

        Filesize

        1024KB

        Download