The ASEC analysis team is using the ASEC automatic analysis system RAPIT to categorize and respond to known malware. This post will list weekly statistics collected from June 6th, 2022 (Monday) to June 12th, 2022 (Sunday).
For the main category, banking malware ranked top with 44.1%, followed by infostealer with 39.3%, backdoor with 9.9%, downloader with 2.9%, and coinminer with 1.9%.
Top 1 – Emotet
Emotet ranked first place with 41.5%. Emotet is a banking malware that is being continuously distributed via spam emails.
Emotet, which has temporarily been excluded from the statistical calculation done by ASEC Weekly Malware Statistics, was included in this week’s statistics as noticeable distributions were spotted recently.
In its basic form, it is a downloader without additional features, but once installed on a system, it can download additional modules or additional malware.
Additional modules include user info-stealing modules that steal information such as web browser and e-mail credentials, and propagation module that spreads via shared folders. Additional malware strains include other banking malware such as Qakbot and Trickbot.
Top 2 – AgentTesla
AgentTesla is an infostealer that ranked second place with 21.4%. It is an info-stealer that leaks user credentials saved in web browsers, emails, and FTP clients.
It uses e-mail to leak collected information, and there are samples that used FTP or Discord API. C&C information of recently collected samples is as follows.
- server : mail.ppecindia[.]com (50.87.154[.]175)
sender : accounts@ppecindia[.]com
receiver : accounts@ppecindia[.]com
user : accounts@ppecindia[.]com
pw : acco****23$
- server : smtp.filamenthubb[.]com (208.91.198[.]46)
sender : hmb@filamenthubb[.]com
receiver : hmb@filamenthubb[.]com
user : hmb@filamenthubb[.]com
pw : Bv****f4
As most are distributed through spam emails disguised as invoices, shipment documents, and purchase orders, the file names contain such words shown above (Invoice, Shipment, P.O. – Purchase Order). Multiple collected samples were disguised as files with extensions of pdf and xlsx.
- Orden de compra 1X 40 USA – Conhsapayhsa #3883.exe
- Bank report.exe
- Statement From A M SHELLFISH LTD.exe
- COA Form & Shipping documents.exe
- MV HUA SHAN CALLING FDA_pdf.exe
- Price Offer.exe
- New delivery boxed package for you.exe
Top 3 – Formbook
Formbook ranked third place with 12.8%.
Like other info-stealer, it is mainly distributed through spam emails. The distributed file names are close to each other.
- WO*LIM RFQ.exe
- Invoice SUN221101.exe
- LPO 088.exe
- Fatura Detay.exe
- Swift 95000USD pdf.exe
- RFQ MAY 2022.exe
As Formbook is injected in a normal process that is in the directory of explorer.exe and system32, the malicious behaviors are performed by the normal process. Besides user credentials in the web browser, the malware can steal various information through keylogging, clipboard grabbing, and web browser form grabbing.
Below is the list of confirmed C&C server URLs of Formbook.
Top 4 – Lokibot
Lokibot malware ranked fourth place with 3.5%. It is an info-stealer that leaks information about programs such as web browsers, email clients, and FTP clients.
Being a malware that is distributed through spam emails, it shares similar file names with other malware spam emails.
- DHL Shipping Documents.exe
- RFQ 210121100.exe
As shown below, most Lokibot C&C server URLs tend to end in fre.php.
Top 5 – RedLine
RedLine ranked fifth place with 2.9%. The malware steals various information such as web browsers, FTP clients, cryptocurrency wallets, and PC settings. It can also download additional malware by receiving commands from the C&C server. Like BeamWinHTTP, there have been numerous cases of RedLine being distributed under the disguise of a software crack file.
The following are the confirmed C&C server domains for RedLine:
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