Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 12:19

General

  • Target
    c5dbb25fa983a695d1c13210e2ff0948.exe
  • Size 478KB
  • Sample240313-phhzqacg21
  • SHA256 7c2d6857361e13e7324493776903df6a455695bf15e0452ab92001f1e200c419
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Ramnit

    Ramnit is a versatile family that holds viruses, worms, and Trojans.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Executes dropped EXE 2 IoCs
  • UPX packed file 25 IoCs

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

  • 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.

  • AutoIT Executable 10 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 5 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 58 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 10 IoCs
  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c5dbb25fa983a695d1c13210e2ff0948.exe
    "C:\Users\Admin\AppData\Local\Temp\c5dbb25fa983a695d1c13210e2ff0948.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies Internet Explorer start page
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3028
    • C:\Users\Admin\AppData\Local\Temp\c5dbb25fa983a695d1c13210e2ff0948mgr.exe
      C:\Users\Admin\AppData\Local\Temp\c5dbb25fa983a695d1c13210e2ff0948mgr.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of UnmapMainImage
      • Suspicious use of WriteProcessMemory
      PID:1364
      • C:\Program Files (x86)\Microsoft\WaterMark.exe
        "C:\Program Files (x86)\Microsoft\WaterMark.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of UnmapMainImage
        • Suspicious use of WriteProcessMemory
        PID:3732
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\system32\svchost.exe
          4⤵
            PID:4916
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 204
              5⤵
              • Program crash
              PID:4308
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:340
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:340 CREDAT:17410 /prefetch:2
              5⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:3340
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3244
            • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
              "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3244 CREDAT:17410 /prefetch:2
              5⤵
              • Modifies Internet Explorer settings
              • Suspicious use of SetWindowsHookEx
              PID:5084
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT /delete /yes
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:960
        • C:\Windows\SysWOW64\at.exe
          AT /delete /yes
          3⤵
            PID:4524
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4336
          • C:\Windows\SysWOW64\at.exe
            AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
            3⤵
              PID:5088
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /C cacls "C:\system volume information" /e /g "Admin":f
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4276
            • C:\Windows\SysWOW64\cacls.exe
              cacls "C:\system volume information" /e /g "Admin":f
              3⤵
                PID:4748
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /C cacls "C:\system volume information" /e /g "Admin":f
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:2984
              • C:\Windows\SysWOW64\cacls.exe
                cacls "C:\system volume information" /e /g "Admin":f
                3⤵
                  PID:1956
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4916 -ip 4916
              1⤵
                PID:4704

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    RecoveryStore.{FB3D6F5D-E133-11EE-87B8-7AD2C9E555B0}.dat

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{FB3D6F5D-E133-11EE-87B8-7AD2C9E555B0}.dat
                    • Size 5KB
                    • SHA256 292536dfe96f3c51f9b79f06c321a57414f88318d0379328a15bf98341723076
                    • MD5 SHA1 SHA512 SSDEEP

                    RecoveryStore.{FB4494D3-E133-11EE-87B8-7AD2C9E555B0}.dat

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{FB4494D3-E133-11EE-87B8-7AD2C9E555B0}.dat
                    • Size 5KB
                    • SHA256 8014e88e5545d08081b4d2f3e81d21647eeb9ef039c9951bd6a09cbc7f5ca6fd
                    • MD5 SHA1 SHA512 SSDEEP

                    verB853.tmp

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verB853.tmp
                    • Size 15KB
                    • SHA256 557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1
                    • MD5 SHA1 SHA512 SSDEEP

                    suggestions[1].en-US

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\PL0BY74L\suggestions[1].en-US
                    • Size 17KB
                    • SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
                    • MD5 SHA1 SHA512 SSDEEP

                    c5dbb25fa983a695d1c13210e2ff0948mgr.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\c5dbb25fa983a695d1c13210e2ff0948mgr.exe
                    • Size 95KB
                    • SHA256 814fc401ecae8a232c94d8e073a2643a2b39e188ed5e468936a921fe33a7e975
                    • MD5 SHA1 SHA512 SSDEEP

                    autorun.ini

                    • Path C:\Windows\SysWOW64\autorun.ini
                    • Size 96B
                    • SHA256 c8da3155d0b474769de322528adbca295dc27a4f93a6011a1170c7a4b616fe1a
                    • MD5 SHA1 SHA512

                    setting.ini.old

                    • Path C:\Windows\SysWOW64\setting.ini.old
                    • Size 1KB
                    • SHA256 6e9cd61a63b8eaa380ec765f08e4dc19738ad11320472b04dc3211588ae2b2e4
                    • MD5 SHA1 SHA512

                    setting.ini.old

                    • Path C:\Windows\SysWOW64\setting.ini.old
                    • Size 1KB
                    • SHA256 799785fad706dfa7b0b7ac82d5d5d5ebf67720163fdd121d2adde8b4f20cd51c
                    • MD5 SHA1 SHA512

                    setting.ini.old

                    • Path C:\Windows\SysWOW64\setting.ini.old
                    • Size 1KB
                    • SHA256 b13b44237dc8faa6a3ad69c0334f21301f810a18b30ce7bdbcc2564f85ad0f5b
                    • MD5 SHA1 SHA512

                    setting.ini.old

                    • Path C:\Windows\SysWOW64\setting.ini.old
                    • Size 1KB
                    • SHA256 ad102a072f25078156cd6f3518be1e8d1b48380374770b555d2e50e1245b561d
                    • MD5 SHA1 SHA512

                    chrome.exe

                    • Path C:\Windows\chrome.exe
                    • Size 478KB
                    • SHA256 7c2d6857361e13e7324493776903df6a455695bf15e0452ab92001f1e200c419
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/1364-19-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-7-0x00000000008D0000-0x00000000008D1000-memory.dmp

                    memory/1364-8-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-13-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-14-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-6-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-5-0x0000000000400000-0x0000000000459F7C-memory.dmp

                    memory/1364-15-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/1364-17-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/3028-108-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-0-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-148-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-71-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-146-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-145-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-142-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-140-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-128-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-113-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3028-111-0x0000000000400000-0x00000000004FD000-memory.dmp

                    memory/3732-34-0x0000000000060000-0x0000000000061000-memory.dmp

                    memory/3732-109-0x0000000000400000-0x0000000000459F7C-memory.dmp

                    memory/3732-110-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/3732-107-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/3732-106-0x0000000000400000-0x0000000000459F7C-memory.dmp

                    memory/3732-35-0x0000000000400000-0x0000000000421000-memory.dmp

                    memory/3732-28-0x0000000000400000-0x0000000000459F7C-memory.dmp

                    memory/3732-25-0x0000000000400000-0x0000000000459F7C-memory.dmp

                    memory/3732-37-0x0000000077E72000-0x0000000077E73000-memory.dmp

                    memory/3732-72-0x0000000077E72000-0x0000000077E73000-memory.dmp

                    memory/3732-70-0x0000000000070000-0x0000000000071000-memory.dmp

                    memory/4916-38-0x0000000000490000-0x0000000000491000-memory.dmp

                    memory/4916-39-0x0000000000470000-0x0000000000471000-memory.dmp