Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/04/2025, 13:48

General

  • Target

    virusshare/3/VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe

  • Size

    64KB

  • MD5

    4aa5734fe9c86184f931f4ddaf2d4d7b

  • SHA1

    a066ccad76f3c63d053cd68ac8692d4f4acf82ac

  • SHA256

    2e18ad3e470b97415beb2cdb8e3ef7510bad21f0a5add020a7f9343dd959eeaa

  • SHA512

    7355ffd3fc59af49af1d57f5327c7442a12c8e5ddc6ec9e176cc27fd4986cd6182f5f6ce91f892c07029efcac37f90d4dd077b6bb226b54c40621b94987a044c

  • SSDEEP

    384:rdP9JIA7uJ1wK2xBpHbVbl+NGYD90pSCfZziEKffhaekBfdReVwoGHdRsArr2rOR:R9JIqNl/SSrrpBfiIdRsorZucnjtsq

Malware Config

Extracted

Family

guloader

C2

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

xor.base64

Signatures

  • Guloader family
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • 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.

  • Checks SCSI registry key(s) 3 TTPs 12 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Modifies data under HKEY_USERS 36 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\virusshare\3\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe
    "C:\Users\Admin\AppData\Local\Temp\virusshare\3\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:4436
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\virusshare\3\VirusShare_4aa5734fe9c86184f931f4ddaf2d4d7b.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      PID:2772
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4784
    • 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:3744
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        C:\Users\Admin\TROFFE\erythroph.exe
        3⤵
          PID:2764
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
          C:\Users\Admin\TROFFE\erythroph.exe
          3⤵
            PID:2512
          • 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:1552
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:1320
        • 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:2340
          • 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:4332
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\TROFFE\erythroph.exe
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:1716
        • 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:1556
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
            C:\Users\Admin\TROFFE\erythroph.exe
            3⤵
              PID:5096
            • 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:1032
        • C:\Windows\system32\dwm.exe
          "dwm.exe"
          1⤵
          • Checks SCSI registry key(s)
          • Enumerates system info in registry
          • Modifies data under HKEY_USERS
          • Suspicious use of AdjustPrivilegeToken
          PID:3920
        • C:\Windows\system32\dwm.exe
          "dwm.exe"
          1⤵
          • Checks SCSI registry key(s)
          • Enumerates system info in registry
          • Modifies data under HKEY_USERS
          • Suspicious use of AdjustPrivilegeToken
          PID:5076

        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

        • memory/1552-25-0x0000000000DA0000-0x0000000000EA0000-memory.dmp

          Filesize

          1024KB

        • memory/1552-14-0x0000000000DA0000-0x0000000000EA0000-memory.dmp

          Filesize

          1024KB

        • memory/1552-26-0x0000000074E60000-0x00000000750E4000-memory.dmp

          Filesize

          2.5MB

        • memory/2772-27-0x0000000074E60000-0x00000000750E4000-memory.dmp

          Filesize

          2.5MB

        • memory/2772-4-0x0000000000990000-0x0000000000A90000-memory.dmp

          Filesize

          1024KB

        • memory/2772-5-0x0000000077B41000-0x0000000077C61000-memory.dmp

          Filesize

          1.1MB

        • memory/2772-23-0x0000000000990000-0x0000000000A90000-memory.dmp

          Filesize

          1024KB

        • memory/3744-13-0x0000000077B41000-0x0000000077C61000-memory.dmp

          Filesize

          1.1MB

        • memory/3744-31-0x0000000002AC0000-0x0000000002AC8000-memory.dmp

          Filesize

          32KB

        • memory/3744-12-0x0000000002AC0000-0x0000000002AC8000-memory.dmp

          Filesize

          32KB

        • memory/3744-24-0x0000000002AC0000-0x0000000002AC8000-memory.dmp

          Filesize

          32KB

        • memory/4332-29-0x0000000074E60000-0x00000000750E4000-memory.dmp

          Filesize

          2.5MB

        • memory/4436-21-0x0000000002290000-0x0000000002298000-memory.dmp

          Filesize

          32KB

        • memory/4436-2-0x0000000002290000-0x0000000002298000-memory.dmp

          Filesize

          32KB

        • memory/4436-22-0x0000000077B41000-0x0000000077C61000-memory.dmp

          Filesize

          1.1MB

        • memory/4436-30-0x0000000002290000-0x0000000002298000-memory.dmp

          Filesize

          32KB

        • memory/4436-3-0x0000000077B41000-0x0000000077C61000-memory.dmp

          Filesize

          1.1MB