Analysis

  • max time kernel
    150s
  • max time network
    105s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250610-en
  • resource tags

    arch:x64arch:x86image:win11-20250610-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/10/2025, 15:31

General

  • Target
    c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe
  • Size 846KB
  • Sample251009-sye5js1kt2
  • SHA256 c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • agenttesla

Credentials
  • Protocol

    ftp

  • Host

    ftp://ftp.antoniomayol.com:21

  • Port

    21

  • Password

    cMhKDQUk1{;%

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Agenttesla family
  • Detects Mofksys worm 14 IoCs
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Mofksys

    Mofksys is a worm written in VisualBasic.

  • Mofksys family
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Drops startup file 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe
    "C:\Users\Admin\AppData\Local\Temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2468
    • \??\c:\users\admin\appdata\local\temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 
      c:\users\admin\appdata\local\temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4528
      • C:\Users\Admin\AppData\Local\starbowlines\konked.exe
        c:\users\admin\appdata\local\temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:2548
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          c:\users\admin\appdata\local\temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:3344
    • C:\Users\Admin\AppData\Local\icsys.icn.exe
      C:\Users\Admin\AppData\Local\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3684
      • \??\c:\windows\system\explorer.exe
        c:\windows\system\explorer.exe
        3⤵
        • Modifies WinLogon for persistence
        • Modifies visibility of hidden/system files in Explorer
        • Boot or Logon Autostart Execution: Active Setup
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:388
        • \??\c:\windows\system\spoolsv.exe
          c:\windows\system\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4608
          • \??\c:\windows\system\svchost.exe
            c:\windows\system\svchost.exe
            5⤵
            • Modifies WinLogon for persistence
            • Modifies visibility of hidden/system files in Explorer
            • Boot or Logon Autostart Execution: Active Setup
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in Windows directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4672
            • \??\c:\windows\system\spoolsv.exe
              c:\windows\system\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:1948
            • C:\Windows\SysWOW64\at.exe
              at 15:33 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:5004
            • C:\Windows\SysWOW64\at.exe
              at 15:34 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:764
            • C:\Windows\SysWOW64\at.exe
              at 15:35 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:6032

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 

        • Path C:\Users\Admin\AppData\Local\Temp\c0b99a4d83d20539cbcb64a75cf4195277d63ef20113a3d3d5a1affe9db263e3.exe 
        • Size 572KB
        • SHA256 d7d6d49ef689dbdea1522f8772062739a78562b78675c98c1682c5b4fcbe79e0
        • MD5 SHA1 SHA512 SSDEEP

        molecast

        • Path C:\Users\Admin\AppData\Local\Temp\molecast
        • Size 239KB
        • SHA256 379daf46b5539016f065ada9a712936f431714905d69832d5ddbab1656bd7d94
        • MD5 SHA1 SHA512 SSDEEP

        seskin

        • Path C:\Users\Admin\AppData\Local\Temp\seskin
        • Size 39KB
        • SHA256 040c09ffa81e8ef311272ec61b1d0daf2b495df8fa8323dd44e712a4b97fccff
        • MD5 SHA1 SHA512 SSDEEP

        icsys.icn.exe

        • Path C:\Users\Admin\AppData\Local\icsys.icn.exe
        • Size 274KB
        • SHA256 2ec6768106ccd3b0ba2712ed213e4cd8effd59717178249c32f24b954f621d87
        • MD5 SHA1 SHA512 SSDEEP

        mrsys.exe

        • Path C:\Users\Admin\AppData\Roaming\mrsys.exe
        • Size 274KB
        • SHA256 3672d99b73ed65b677f86a700f61b89d683b8cf869632ed15a4395eac9d1e4c1
        • MD5 SHA1 SHA512 SSDEEP

        explorer.exe

        • Path C:\Windows\System\explorer.exe
        • Size 274KB
        • SHA256 5f472340b4f5be28d6bbc623d1dca5cd1ec545649493d2c2079d5c7a4b6af978
        • MD5 SHA1 SHA512 SSDEEP

        spoolsv.exe

        • Path C:\Windows\System\spoolsv.exe
        • Size 274KB
        • SHA256 85f04d2dd79150eb135573e46493dc0cceaeb543cb15e13ed7073499385bb0cd
        • MD5 SHA1 SHA512 SSDEEP

        svchost.exe

        • Path C:\Windows\System\svchost.exe
        • Size 274KB
        • SHA256 0618b77180db6b0cf5d079d6ab7a3f5ab0d96de48e13824ec82799df0aaf3ae7
        • MD5 SHA1 SHA512 SSDEEP

        memory/388-92-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/388-45-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/1948-70-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2468-0-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2468-81-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/2548-86-0x00000000003C0000-0x000000000050B000-memory.dmp

        memory/2548-24-0x00000000003C0000-0x000000000050B000-memory.dmp

        memory/3344-90-0x0000000006190000-0x00000000061E0000-memory.dmp

        memory/3344-84-0x0000000000590000-0x00000000005D2000-memory.dmp

        memory/3344-87-0x00000000052B0000-0x0000000005856000-memory.dmp

        memory/3344-88-0x0000000004E00000-0x0000000004E66000-memory.dmp

        memory/3344-89-0x00000000060F0000-0x0000000006182000-memory.dmp

        memory/3344-91-0x00000000062D0000-0x00000000062DA000-memory.dmp

        memory/3684-80-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/4528-8-0x00000000007F0000-0x000000000093B000-memory.dmp

        memory/4528-20-0x0000000001150000-0x0000000001550000-memory.dmp

        memory/4528-26-0x00000000007F0000-0x000000000093B000-memory.dmp

        memory/4608-77-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/4672-64-0x0000000000400000-0x000000000043E000-memory.dmp

        memory/4672-93-0x0000000000400000-0x000000000043E000-memory.dmp