2020-10-08 - PASSWORD-PROTECTED XLS FILES PUSH ZLOADER (SILENT NIGHT)

ASSOCIATED FILES:

• 2020-10-08-ZLoader-IOCs.txt.zip   1.1 kB   (1,090 bytes)

• 2020-10-08-ZLoader-IOCs.txt   (1,727 bytes)

• 2020-10-07-malspam-pushing-ZLoader-2-examples.zip   205 kB   (205,001 bytes)

• 2020-10-07-malspam-pushing-ZLoader-example-1-of-2.eml   (148,066 bytes)
• 2020-10-07-malspam-pushing-ZLoader-example-2-of-2.eml   (171,669 bytes)

• 2020-10-08-password-protected-Excel-sheet-pushes-ZLoader.pcap.zip   7.8 MB   (7,834,618 bytes)

• 2020-10-08-password-protected-Excel-sheet-pushes-ZLoader.pcap   (8,356,148 bytes)

• 2020-10-08-ZLoader-malware-and-artifacts.zip   8.3 MB   (8,301,717 bytes)

• 2020-10-08-registry-update-for-ZLoader.txt   (620 bytes)
• Audrey Beckmann Resume.xls   (125,440 bytes)
• BjjWJjG/ThPgSWv/qmbvlcq.dll   (421,888 bytes)
• Users/user1/AppData/Roaming/Axla/
• Users/user1/AppData/Roaming/Axabb/
• Users/user1/AppData/Roaming/Erwak/qyyfok.go   (308,994 bytes)
• Users/user1/AppData/Roaming/Etuzl/afonxa.yng   (323,558 bytes)
• Users/user1/AppData/Roaming/Itepge/qyozumdo.ef   (233,393 bytes)
• Users/user1/AppData/Roaming/Izmy/asimawa.kor   (1,955,369 bytes)
• Users/user1/AppData/Roaming/Meob/keaqxieb.dll   (421,888 bytes)
• Users/user1/AppData/Roaming/Onkuel/kixuozt.buim   (135,783 bytes)
• Users/user1/AppData/Roaming/Toihu/bynekya.yhe   (3,378,943 bytes)
• Users/user1/AppData/Roaming/Udnagu/dyduraly.heew   (357,982 bytes)
• Users/user1/AppData/Roaming/Unos/adpy.nyimn   (0 bytes)
• Users/user1/AppData/Roaming/Xiyv/asyfak.ip   (931,330 bytes)

NOTES:

• All zip archives on this site are password-protected with the standard password.  If you don't know it, see the "about" page of this website.

IMAGES

Shown above:  Screenshot from one of the emails sent on 2020-10-07.

Shown above:  Opening the attached Excel file requires a password (password is: 1234).

Shown above:  Screenshot of an opened spreadsheet.

Shown above:  Network traffic seen immediately after enabling macros.

Shown above:  Initial location of downloaded DLL file on the victim host.

Shown above:  Traffic from an infection filtered in Wireshark.

Shown above:  ZLoader DLL persisent among several decoy folders in the AppData\Roaming directory.

Shown above:  Registry update to keep ZLoader persistent.

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