ASEC Weekly Malware Statistics (November 8th, 2021 – November 14th, 2021)

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 November 8th, 2021 (Monday) to November 14th, 2021 (Sunday).

For the main category, info-stealer ranked top with 41.8%, followed by RAT (Remote Administration Tool) malware with 24.7%, Downloader with 23.0%, Backdoor malware with 4.7%, CoinMiner with 3.3%, Ransomware with 2.3% and Banking malware with 0.2%.

Top 1 –  BeamWinHTTP

BeamWinHTTP is a downloader malware that has taken first place once again with 22.2%. BeamWinHTTP is distributed via malware disguised as PUP installer. When it is executed, it installs PUP malware Garbage Cleaner, and can download and install additional malware at the same time.

Malware Being Sneakily Installed in My PC-BeamWinHTTP Malware

Recently, there have been numerous cases of distribution by the dropper disguised as a software crack file. The ASEC analysis team is responding to this malware using the alias ‘MulDrop.’ See the following blog post for more information on the malware.

Various Types of Threats Disguised as Software Download Being Distributed

The confirmed C&C server URL is as follows.

  • gcl-gb[.]biz
  • g-localdevice[.]biz

Top 2 –  RedLine

RedLine malware ranked second place with 18.5%. 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.

유튜브를 통해 유포 중인 RedLine 인포스틸러

The following are the confirmed C&C server domains for RedLine:

  • 135.181.129[.]119:4805/
  • 91.121.67[.]60:51630/
  • 23.88.109[.]42:55961/
  • 185.215.113[.]205:65531/
  • 185.183.32[.]184:80/
  • 164.132.202[.]23:35481/
  • 95.181.152[.]14:46927/
  • 185.215.113[.]109:44059/
  • dorasandeau[.]xyz:80/
  • teylerityah[.]xyz:80/
  • leanaengama[.]xyz:80/

Top 3 –  AgentTesla

AgentTesla was ranked third place with 15.8%. It is an info-stealer malware that leaks user credentials saved in web browsers, emails, and FTP clients.

How AgentTesla Malware is Being Distributed in Korea

Recently collected samples use the following email servers and user accounts when leaking the collected information.

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). There are many samples with extensions disguised as document files such as pdf and xlsx or Auto CAD blueprint files such as dwg.

  • (GPQ 21_0104A) R100-XH50.exe
  • __P_O.EXE 13404120211111scan,_pdf.exe
  • 19002-AR-APT-909-00 MDC.exe
  • Advice_Payment_Copy.exe
  • Bank Details.exe
  • details__of_payment.exe
  • Doc2035678923456789320.pdf…exe
  • DynamicPartitionerForIEnumerab.exe
  • E-Invoice_No_11073490.exe
  • EQI-NEWTUO160.exe
  • FTG00123.exe
  • Haemotronic Nov PO_76565 Urgentepdf.exe
  • Halkbank,pdf.exe
  • Invoice_and_packing_list.exe
  • Invoice_No__ANT19-20646.exe
  • Order_Confirmation.exe
  • Payment_Advice.exe
  • Payment_transfer.exe
  • PO#11092021.exe
  • POHG18100405.exe
  • product_Quotation_0921218383.exe
  • Request_For_Quotation.exe
  • Revised TRVTT214359 SWIFT MT103.exe
  • RFQ_#CNXT-HG20211109_PDF.exe
  • SCB_MT103_31526R2111120067_211112.exe
  • shipping_documents.exe
  • vergi ödeme faturası 8 Kasım 2021 Pazartesipdf.exe

Top 4 – Formbook

Formbook is an info-stealer malware that ranked fourth place with 10.3%.

메일을 통해 유포 중인 새로운 버전의 Formbook 악성코드

Like other info-stealer malware, it is mainly distributed through spam emails. The distributed file names are close to each other.

  • Tax Payment Invoice – Thursday 11th November 2021,pdf.exe
  • AWN#INVOICE2021119.PDF.exe
  • Company_Doc_b247597.exe
  • DHL#invoice.PDF.exe
  • DHL#SHIPMENTR129724.PDF.exe
  • DHL2021110900001.PDF.exe
  • Factura_842.pdf.exe
  • GV033331#TKN104183110140.pdf.exe
  • Items_for_new_project-6109.exe
  • KJ_09112021__MT-SGWI.exe
  • New_OrderTCSQ_22102021__Lifetime.exe
  • Payment_Order.exe
  • PO__SWIFT_REFRIGO_-_Payment.exe
  • PO_0096617291.exe
  • PO_211102.exe
  • Purchase#Order#39449.pdf.exe
  • Purchase_Order-10,000MT.exe
  • RFQ_38383090.exe
  • SKC360i21092307520.exe
  • Tender_and_Appendix.exe
  • TNT#9066721066.PDF.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.

Formbook 악성코드의 C2 통신 방식

Below is the list of confirmed C&C server URLs of Formbook.

  • hxxp://www.awsul[.]online/fh3c/
  • hxxp://www.baipees[.]com/teni/
  • hxxp://www.bake8teen[.]com/rht9/
  • hxxp://www.bella-pi[.]com/nurc/
  • hxxp://www.bitrice23[.]com/bcwg/
  • hxxp://www.bits-clicks[.]com/a49i/
  • hxxp://www.busy-clicks[.]com/e8ia/
  • hxxp://www.ckoutim[.]xyz/b8lb/
  • hxxp://www.confled[.]online/cy88/
  • hxxp://www.dress-ads[.]com/z4m5/
  • hxxp://www.easybeasts[.]com/i44q/
  • hxxp://www.gulebic[.]com/e3rs/
  • hxxp://www.high-clicks2[.]com/n652/
  • hxxp://www.jam-nins[.]com/n7ak/
  • hxxp://www.japxo[.]online/dn7r/
  • hxxp://www.lutam[.]xyz/b3n1/
  • hxxp://www.makrep[.]online/s3r1/
  • hxxp://www.mcabyv[.]xyz/hd6y/
  • hxxp://www.minismi2[.]com/u0n0/
  • hxxp://www.posetac[.]online/dv9n/
  • hxxp://www.proach[.]online/a34b/
  • hxxp://www.ranbix[.]com/w240/
  • hxxp://www.rebles45[.]com/w8n5/
  • hxxp://www.renaziv[.]online/ss5s/
  • hxxp://www.saint444[.]com/fqiq/
  • hxxp://www.sarjin[.]xyz/ob7y/
  • hxxp://www.seo-clicks7[.]com/r4gk/
  • hxxp://www.smaclo[.]online/a1f7/
  • hxxp://www.stamore[.]online/bl8s/
  • hxxp://www.tamsef[.]online/mlk1/
  • hxxp://www.welmovs[.]xyz/gr1c/
  • hxxp://www.yaruky[.]xyz/wk31/

Top 5 –  Lokibot

Lokibot malware ranked fifth place with 5.3%. It is an info-stealer malware that leaks information about programs such as web browsers, email clients, and FTP clients.

구매 주문서 메일로 위장하여 유포 중인 Lokibot 악성코드

Being a malware that is distributed through spam emails, it shares similar file names with other malware spam emails.

  • Transfer Info Partial Paymentpdf________________________________.exe
  • 2021_NovemberPurchaseOrderTemplate.exe
  • 2021_NovemberPurchaseOrderTemplate\2021_11NTTF.exe
  • 2021_NovemberPurchaseOrderTemplate\2021_11NTTF.exe
  • 2021_NovemberPurchaseOrderTemplate\2021_11STV.exe
  • (G0170-PF3F-21-1110).exe
  • AS211108SW.exe
  • AS211110SW.exe
  • Payment copy.exe
  • Pedido de Compra PO06708.XLXs___________________________________.bat
  • PO 21081111B.exe
  • Se*oong Ref No. MQ-3018 & MQ-3019.exe
  • SWIFT_COPY.exe

As shown below, most Lokibot C&C server URLs tend to end in fre.php.

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Article Link: ASEC Weekly Malware Statistics (November 8th, 2021 – November 14th, 2021) - ASEC BLOG