Resubmissions

11-07-2022 13:08

220711-qdebeahcgm 10

11-07-2022 03:42

220711-d9b5psgga9 10

Analysis

  • max time kernel
    150s
  • max time network
    51s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    11-07-2022 03:42

General

  • Target

    E-bill.exe

  • Size

    968KB

  • MD5

    e8f5b21f536286d5fb65297300f4b11f

  • SHA1

    c21a5f1668385d581d5ddebdd9907be4c961383a

  • SHA256

    e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e

  • SHA512

    21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b

Malware Config

Extracted

Family

kutaki

C2

http://ojorobia.club/laptop/laptop.php

http://terebinnahicc.club/sec/kool.txt

Signatures

  • Kutaki

    Information stealer and keylogger that hides inside legitimate Visual Basic applications.

  • Kutaki Executable 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 64 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\E-bill.exe
    "C:\Users\Admin\AppData\Local\Temp\E-bill.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1932
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
      2⤵
        PID:2028
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\piluylch.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\piluylch.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:1748

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\piluylch.exe

      Filesize

      968KB

      MD5

      e8f5b21f536286d5fb65297300f4b11f

      SHA1

      c21a5f1668385d581d5ddebdd9907be4c961383a

      SHA256

      e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e

      SHA512

      21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\piluylch.exe

      Filesize

      968KB

      MD5

      e8f5b21f536286d5fb65297300f4b11f

      SHA1

      c21a5f1668385d581d5ddebdd9907be4c961383a

      SHA256

      e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e

      SHA512

      21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b

    • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\piluylch.exe

      Filesize

      968KB

      MD5

      e8f5b21f536286d5fb65297300f4b11f

      SHA1

      c21a5f1668385d581d5ddebdd9907be4c961383a

      SHA256

      e296a3f9af1ee967a9a919495e2a12917dd4077d794a54e25b9e16c02854a74e

      SHA512

      21d16e637bdb9849656f949e46b6f37ad1b3f5338555f514804467a30b75c4f6e574ac6058b7d1ec8235c57aa16b190acb532f3905cb2bbbb9f1ad6c4362df7b

    • memory/1748-60-0x0000000000000000-mapping.dmp

    • memory/1932-56-0x00000000757C1000-0x00000000757C3000-memory.dmp

      Filesize

      8KB

    • memory/2028-57-0x0000000000000000-mapping.dmp