Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    09-11-2024 19:05

General

  • Target

    3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f.exe

  • Size

    416KB

  • MD5

    ae00ad0a951b7f5fd34acd8c1d3cb1c3

  • SHA1

    d15761a9272edd220b76ce2063714a09cca3c4e7

  • SHA256

    3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f

  • SHA512

    a16a61cc3625279c381a05acdc50e9e4c8ebb296884cac3000f0702bfc30bdcdd3d971fcd6db4c35469be4cd8d7ba9544f01cbcabb7a35ad3ce0d76d905869cf

  • SSDEEP

    6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse

Malware Config

Signatures

  • Blocklisted process makes network request 10 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f.exe
    "C:\Users\Admin\AppData\Local\Temp\3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2624
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yrsby.exe "C:\Users\Admin\AppData\Local\Temp\3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:1444
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:1736
      • C:\Users\Admin\AppData\Local\Temp\yrsby.exe
        C:\Users\Admin\AppData\Local\Temp\\yrsby.exe "C:\Users\Admin\AppData\Local\Temp\3a698dd58a116915f6a48fe8423a5a8e45f528ac2ce1bd0e6a822950955ad99f.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2376
        • \??\c:\windows\SysWOW64\rundll32.exe
          c:\windows\system32\rundll32.exe "c:\Program Files\zsufy\vgwcs.dll",Verify C:\Users\Admin\AppData\Local\Temp\yrsby.exe
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • System Location Discovery: System Language Discovery
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\yrsby.exe

    Filesize

    416KB

    MD5

    0d6d1deaa701a1c69003f5e16489e636

    SHA1

    0b7fcf210e3636d543e7f1f78aa3c21fa45e2239

    SHA256

    50a27a18fd9a99f05e088eb9fcf8db43ddf9ff08bd099f50d8c8be7eb87acb9b

    SHA512

    41b0f84790070e26c6535dab6d670c98e23c48ddaae6cc21136789c9ef18dadf82bece6be31a2d998700df88301e3700e9d332b2f3cfe004eeee4bab21f2339a

  • \??\c:\Program Files\zsufy\vgwcs.dll

    Filesize

    228KB

    MD5

    ae1bc5ee3f1c7e857ff0522324ebc7d0

    SHA1

    c2f2feb1b8502c2ddc95b8e45fc7434b0edbdfd2

    SHA256

    36c7c545800e6aba9675d1530da05578722ad9d6829a4c3e1df7cda9e9d81823

    SHA512

    bcda250b2e68bbdf7b5a6f252f1da9388ba207e9655cf752c788e513f1ede9e059747411ca9ab9018108d9a1a75a30fdfa05f034ad6bcae2bc39f207af80dac6

  • memory/1444-7-0x00000000001E0000-0x0000000000244000-memory.dmp

    Filesize

    400KB

  • memory/2376-9-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

  • memory/2624-0-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

  • memory/2624-2-0x0000000000400000-0x0000000000464000-memory.dmp

    Filesize

    400KB

  • memory/2944-12-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/2944-16-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/2944-17-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB

  • memory/2944-19-0x0000000010000000-0x0000000010080000-memory.dmp

    Filesize

    512KB