Analysis

  • max time kernel
    1772s
  • max time network
    1599s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    17-02-2023 15:42

General

  • Target

    f71097bbf0ae9f1bb453692e1c1c047211478b857066ef4cd3ec813b20d5fa76.exe

  • Size

    194KB

  • MD5

    98cf46f89ef857a797749396c9eeb62c

  • SHA1

    f628c8367ff678f8907c79dfc1ce96bc4901c856

  • SHA256

    f71097bbf0ae9f1bb453692e1c1c047211478b857066ef4cd3ec813b20d5fa76

  • SHA512

    c9e7aeb464c8a0c268fb46b455f80afdd5b1c7e8c9e89442ffe263ca244a1b3bb8dd6a7001a47bf8678ba62076fa2069804817f1e5326b736da62cf0b4a8572a

  • SSDEEP

    3072:uzsOF+4cKPo1QDLBKSWPa5jnBYP/P70zU+dTWJbIOeHE0V:uzs//duLASrBYT0zUHJcOeHE

Score
10/10

Malware Config

Extracted

Family

colibri

Version

1.4.0

Botnet

Uniques

C2

http://194.4.49.243/gate.php

rc4.plain

Signatures

  • Colibri Loader

    A loader sold as MaaS first seen in August 2021.

  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f71097bbf0ae9f1bb453692e1c1c047211478b857066ef4cd3ec813b20d5fa76.exe
    "C:\Users\Admin\AppData\Local\Temp\f71097bbf0ae9f1bb453692e1c1c047211478b857066ef4cd3ec813b20d5fa76.exe"
    1⤵
      PID:1800
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      1⤵
        PID:1840
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0xc8
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:988
      • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
        "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Desktop\UpdateComplete.doc"
        1⤵
        • Drops file in Windows directory
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1348
        • C:\Windows\splwow64.exe
          C:\Windows\splwow64.exe 12288
          2⤵
            PID:2036
        • C:\Windows\system32\NOTEPAD.EXE
          "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\price_notes.txt
          1⤵
          • Opens file in notepad (likely ransom note)
          • Suspicious use of FindShellTrayWindow
          PID:2004

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Defense Evasion

        Modify Registry

        1
        T1112

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1348-61-0x0000000072DC1000-0x0000000072DC4000-memory.dmp
          Filesize

          12KB

        • memory/1348-66-0x000000007182D000-0x0000000071838000-memory.dmp
          Filesize

          44KB

        • memory/1348-65-0x000000007182D000-0x0000000071838000-memory.dmp
          Filesize

          44KB

        • memory/1348-63-0x000000005FFF0000-0x0000000060000000-memory.dmp
          Filesize

          64KB

        • memory/1348-62-0x0000000070841000-0x0000000070843000-memory.dmp
          Filesize

          8KB

        • memory/1800-57-0x0000000000400000-0x0000000000560000-memory.dmp
          Filesize

          1.4MB

        • memory/1800-60-0x000000000065B000-0x000000000066E000-memory.dmp
          Filesize

          76KB

        • memory/1800-58-0x000000000065B000-0x000000000066E000-memory.dmp
          Filesize

          76KB

        • memory/1800-54-0x00000000760D1000-0x00000000760D3000-memory.dmp
          Filesize

          8KB

        • memory/1800-56-0x0000000000220000-0x0000000000226000-memory.dmp
          Filesize

          24KB

        • memory/1800-55-0x000000000065B000-0x000000000066E000-memory.dmp
          Filesize

          76KB

        • memory/1840-59-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp
          Filesize

          8KB

        • memory/2036-67-0x0000000000000000-mapping.dmp