exploit the possibilities

Armadito Antivirus 0.12.7.2 Detection Bypass

Armadito Antivirus 0.12.7.2 Detection Bypass
Posted Feb 23, 2018
Authored by Souhail Hammou

Armadito Antivirus version 0.12.7.2 suffers from a detection bypass vulnerability.

tags | exploit, bypass
advisories | CVE-2018-7289
MD5 | f5b81f188805211be13432cac9f664ab

Armadito Antivirus 0.12.7.2 Detection Bypass

Change Mirror Download
/*
Title: Armadito Antivirus - Malware Detection Bypass
Date: 21/02/2018
Author: Souhail Hammou
Author's website: http://rce4fun.blogspot.com
Vendor Homepage: http://www.teclib-edition.com/en/
Version: 0.12.7.2
CVE: CVE-2018-7289


Details:
--------
An issue was discovered in armadito-windows-driver/src/communication.c affecting Armadito 0.12.7.2 and previous versions.
Malware with filenames containing pure UTF-16 characters can bypass detection.
The user-mode service will fail to open the file for scanning after the conversion is done from Unicode to ANSI.
This happens because characters that cannot be converted from Unicode are replaced with the '?' character.

The code responsible for this issue is located in armadito-windows-driver/src/communication.c

========================================================================================================
// Convert unicode string to ansi string for ring 3 process.
ntStatus = RtlUnicodeStringToAnsiString(&AnsiString, (PCUNICODE_STRING)FilePath, TRUE);
if(!NT_SUCCESS(ntStatus)){
DbgPrint("[-] Error :: ArmaditoGuard!SendScanOrder :: RtlUnicodeStringToAnsiString() routine failed !! \n");
__leave;
}
========================================================================================================

The two examples below demonstrate the bug.
In the first case, the filename is in Arabic and in the second, the filename's first letter is the greek M (U+039C).


Original filename:
UO+-OO"OSS.exe : 0645 0631 062d 0628 0627 002e 0065 0078 0065

Converted to ANSI by Armadito:
?????.exe : 3f 3f 3f 3f 3f 2e 65 78 65

=============================

Original filename:
Ialware.exe : 039c 0061 006c 0077 0061 0072 0065 002e 0065 0078 0065

Converted to ANSI by Armadito:
?alware.exe : 3f 61 6c 77 61 72 65 2e 65 78 65


See: https://github.com/armadito/armadito-windows-driver/issues/5
*/


Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

January 2019

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jan 1st
    15 Files
  • 2
    Jan 2nd
    15 Files
  • 3
    Jan 3rd
    11 Files
  • 4
    Jan 4th
    1 Files
  • 5
    Jan 5th
    2 Files
  • 6
    Jan 6th
    5 Files
  • 7
    Jan 7th
    24 Files
  • 8
    Jan 8th
    15 Files
  • 9
    Jan 9th
    16 Files
  • 10
    Jan 10th
    23 Files
  • 11
    Jan 11th
    17 Files
  • 12
    Jan 12th
    3 Files
  • 13
    Jan 13th
    2 Files
  • 14
    Jan 14th
    18 Files
  • 15
    Jan 15th
    33 Files
  • 16
    Jan 16th
    23 Files
  • 17
    Jan 17th
    29 Files
  • 18
    Jan 18th
    15 Files
  • 19
    Jan 19th
    0 Files
  • 20
    Jan 20th
    0 Files
  • 21
    Jan 21st
    0 Files
  • 22
    Jan 22nd
    0 Files
  • 23
    Jan 23rd
    0 Files
  • 24
    Jan 24th
    0 Files
  • 25
    Jan 25th
    0 Files
  • 26
    Jan 26th
    0 Files
  • 27
    Jan 27th
    0 Files
  • 28
    Jan 28th
    0 Files
  • 29
    Jan 29th
    0 Files
  • 30
    Jan 30th
    0 Files
  • 31
    Jan 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2019 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close