Analysis

  • max time kernel
    93s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/06/2024, 23:53

General

  • Target
    667375cc2bfe7e982cac3f5885383f16cdb5c2e5919496d54222f3f75ebc243d.dll
  • Size 152KB
  • Sample240605-3xe39sdb46
  • SHA256 667375cc2bfe7e982cac3f5885383f16cdb5c2e5919496d54222f3f75ebc243d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Ramnit

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

  • UPX dump on OEP (original entry point) 10 IoCs
  • Executes dropped EXE 2 IoCs
  • UPX packed file 12 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 33 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\667375cc2bfe7e982cac3f5885383f16cdb5c2e5919496d54222f3f75ebc243d.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2844
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\667375cc2bfe7e982cac3f5885383f16cdb5c2e5919496d54222f3f75ebc243d.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:1684
      • C:\Windows\SysWOW64\rundll32mgr.exe
        C:\Windows\SysWOW64\rundll32mgr.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Program Files directory
        • Suspicious use of UnmapMainImage
        • Suspicious use of WriteProcessMemory
        PID:388
        • C:\Program Files (x86)\Microsoft\WaterMark.exe
          "C:\Program Files (x86)\Microsoft\WaterMark.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of UnmapMainImage
          • Suspicious use of WriteProcessMemory
          PID:1528
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\system32\svchost.exe
            5⤵
              PID:1044
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1044 -s 208
                6⤵
                • Program crash
                PID:3348
            • C:\Program Files\Internet Explorer\iexplore.exe
              "C:\Program Files\Internet Explorer\iexplore.exe"
              5⤵
              • Modifies Internet Explorer settings
              PID:4768
            • C:\Program Files\Internet Explorer\iexplore.exe
              "C:\Program Files\Internet Explorer\iexplore.exe"
              5⤵
              • Modifies Internet Explorer settings
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4444
              • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
                "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4444 CREDAT:17410 /prefetch:2
                6⤵
                • Modifies Internet Explorer settings
                • Suspicious use of SetWindowsHookEx
                PID:1388
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1044 -ip 1044
      1⤵
        PID:4080

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
            • Size 471B
            • SHA256 38d397c653cacc803ac689cc6dadce2f32d45de009fe47e48a2d3e2452e78937
            • MD5 SHA1 SHA512

            7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
            • Size 404B
            • SHA256 004090cd676d41767c4e916db4dabcf0c9066713076a497f1ac664aca2189b3f
            • MD5 SHA1 SHA512

            verD0DD.tmp

            • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\VersionManager\verD0DD.tmp
            • Size 15KB
            • SHA256 557472aeaebf4c1c800b9df14c190f66d62cbabb011300dbedde2dcddd27a6c1
            • MD5 SHA1 SHA512 SSDEEP

            suggestions[1].en-US

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WOBB13N1\suggestions[1].en-US
            • Size 17KB
            • SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
            • MD5 SHA1 SHA512 SSDEEP

            rundll32mgr.exe

            • Path C:\Windows\SysWOW64\rundll32mgr.exe
            • Size 59KB
            • SHA256 5a5b85c582d5d4b3b912ee6789babebf8ae6d87330d0d33d87274841952899dd
            • MD5 SHA1 SHA512 SSDEEP

            memory/388-16-0x00000000008B0000-0x00000000008B1000-memory.dmp

            memory/388-10-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-5-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-12-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-9-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-8-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-7-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/388-6-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/1044-32-0x00000000003D0000-0x00000000003D1000-memory.dmp

            memory/1044-31-0x00000000003F0000-0x00000000003F1000-memory.dmp

            memory/1528-27-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/1528-33-0x0000000000070000-0x0000000000071000-memory.dmp

            memory/1528-34-0x0000000077182000-0x0000000077183000-memory.dmp

            memory/1528-36-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/1528-35-0x0000000000400000-0x0000000000423000-memory.dmp

            memory/1528-37-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/1528-18-0x0000000000400000-0x0000000000423000-memory.dmp

            memory/1528-26-0x00000000001D0000-0x00000000001D1000-memory.dmp

            memory/1528-28-0x0000000000400000-0x0000000000421000-memory.dmp

            memory/1528-29-0x0000000077182000-0x0000000077183000-memory.dmp

            memory/1684-1-0x0000000010000000-0x0000000010027000-memory.dmp