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Germán Fernández Profile picture
@1ZRR4H
Sep 29, 2022 • 10 tweets • 13 min read • Read on X
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1/ So, site impersonating @Fortinet downloads signed MSI that uses Powershell to run #BatLoader, if the user is connected to a domain (corporate network) it deploys:

1) #Ursnif (Bot)
2) #Vidar (Stealer)
3) #Syncro RMM (C2)
4) #CobaltStrike
And possibly
5) #Ransomware 💥 ImageImageImageImage
2/ For initial deployment they use NirCmd, NSudo and GnuPG (to encrypt payloads) among other utilities.

* Remove-Item -Path "HKLM:\SOFTWARE\Microsoft\AMSI\Providers\{2781761E-28E0-4109-99FE-B9D127C57AFE}" -Recurse
* Remove-Encryption -FolderPath $env:APPDATA -Password '105b' ImageImageImageImage
3/ The websites are boosted through SEO poisoning and impersonate brands such as @Zoom, @TeamViewer, @anydesk, @LogMeIn, @CCleaner, #FileZilla and #Winrar among others.

/teamviewclouds.com
/zoomcloudcomputing.tech
/logmein-cloud.com
/teamcloudcomputing.com
/anydeskos.com ImageImageImageImage
4/ Apparently this would be a "new" #Malsmoke campaign and these are the IoCs I saw:

#Ursnif aka #Gozi

C&C:
/45.8.158.104
/188.127.224.114
/weiqeqwns.com
/wdeiqeqwns.com
/weiqeqwens.com
/weiqewqwns.com
/iujdhsndjfks.com

[+] tria.ge/220928-xh5gqag… Image
5/ #Vidar is a thief that allows them to collect multiple valid credentials quickly from computers.

C2 from Telegram and Mastodon:
/t.me/trampapanam > 116.202.2.236
/nerdculture.de/yoxhyp > 88.198.89.6:80

[+] tria.ge/220928-vcwxaah… ImageImage
6/ Then the TA install #Syncro RMM (I didn't know this one) for C&C and persistence on the infected computers.

The installer sends a signal to:
/rmm.syncromsp.com/device_api/auth/?shop_api_key=HABB92nNT4_O5RPUFRDWwA&installer_version=1.0.161

[+] virustotal.com/gui/file/1988e… Image
7/ There are currently two #BatLoader C2 domains in use: updatea1[.]com and cloudupdatesss[.]com.

These were also being reported by @nosecurething who could see the usage of #SystemBC as well and @idclickthat on

/cc: @ViriBack ImageImageImage
8/ I couldn't get the #CobaltStrike beacon yet, but no doubt, these are some C2s to watch out for:

/pregabas.com
/msoftupdate.com
/sombrat.com
/callibry.to
/alojun.com
/sombrat.com
/fregiyu.com
/get-topservice.com
/service1ventures.com
/anbush.com
/ausija.com
/zominoz.com Image
9/ More information about this campaign:
- medium.com/walmartglobalt…
- mandiant.com/resources/blog…
New domains related to this campaign, now impersonating AnyDesk, SlackHQ, Evernote and Adobe Acrobat Reader 🥸

/anydesko.tech
/slackss.tech
/evernotes.tech
/adobee.tech

Yara rule for MSI files: github.com/CronUp/ReglasD…

#BatLoader C2:
/cloudupdatesss.com
ImageImageImageImage

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More from @1ZRR4H

Germán Fernández Profile picture
Feb 2, 2024
📌 1/ I find this technique very interesting, it's a LNK file that executes a payload that hides in the remnant data of the same LNK file, so, if you only look at the shortcut properties you might miss something. [+] Document.pdf.lnk: bazaar.abuse.ch/sample/1eaec3a….

▪ 1) "powershell -W Hidden -e [Base64]" > http://raw.githubusercontent[.]com/MyPrincessAkira/Jarvas/main/Alej.exe.
▪ 2) PDF decoy from http://files.catbox[.]moe/p1yr9i.pdf.

Then, "Alej.exe" (bazaar.abuse.ch/sample/e974fde…) downloads the next stage from https://qu[.]ax/Gvlc.pdf (404 now).

Thanks to @malwrhunterteam for sharing the initial sample 🦾

T1204.001 User Execution: Malicious LinkImage
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2/ The Github repository gives us more clues about the possible propagation method: Youtube videos (including positive comments made by fraudulent accounts).

https://github[.]com/MyPrincessAkira/Jarvas/

- "engagement.txt":
https://www[.]youtube[.]com/watch?v=tYMUm7rabFM
https://www[.]youtube[.]com/watch?v=ccTKARJiM5c
https://www[.]youtube[.]com/watch?v=HL3Q9e5J3aU
https://www[.]youtube[.]com/watch?v=jQWB3zuhtEQ
https://www[.]youtube[.]com/watch?v=oADMNyZxrYM
https://www[.]youtube[.]com/watch?v=BtUdfVU0Tpc
https://www[.]youtube[.]com/watch?v=bGNibYNYFZ4
https://www[.]youtube[.]com/watch?v=o7lLqcEX96A
https://www[.]youtube[.]com/watch?v=zIXGazKWIT0
https://www[.]youtube[.]com/watch?v=QUvdG3g_a1s
https://www[.]youtube[.]com/watch?v=Cwzrzddv8qY
https://www[.]youtube[.]com/watch?v=c49YKB5dkEA
https://www[.]youtube[.]com/watch?v=V3zEF2v60mk
https://www[.]youtube[.]com/watch?v=8sacRZJrQgw
https://www[.]youtube[.]com/watch?v=BiRXvDc9zLE
https://www[.]youtube[.]com/watch?v=iGla02rqxJs
https://www[.]youtube[.]com/watch?v=Zb6FHscJPGM

- "videos_redirect.txt":
http://files[.]catbox[.]moe/o5w3yq[.]zip
http://files[.]catbox[.]moe/g6mac3[.]zip
http://files[.]catbox[.]moe/ab4uzt[.]zip
http://files[.]catbox[.]moe/j697j3[.]zip
http://files[.]catbox[.]moe/xhdjzs[.]zip
http://files[.]catbox[.]moe/gt2njt[.]zipImage
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@JAMESWT_MHT @0xToxin @pr0xylife @AnFam17 @executemalware @g0njxa @StopMalvertisin @reecdeep @Cryptolaemus1 @Kostastsale 3/ Some samples of the videos (apparently all associated with games) and their comments. Image
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Read 5 tweets
Germán Fernández Profile picture
May 25, 2023
🚨 1/ Ongoing campaign primarily targeting security researchers here on Twitter.

Possibly they are trying to exploit some vulnerability in Internet Explorer and database tools like Navicat. I haven't been able to get the malicious payload yet, but something fishy is going on 🤔 ImageImageImageImage
2/ Tweets mention things like #0day, #databreach, #Kimsuky, #Lazarus and point to a file download on pan[.]baidu[.]com, just now removed.

There is also a repo on Github with connection data and credentials to supposed DBs and Web Apps that ask to use IE 🤭 ImageImageImageImage
3/ I tried 211.143.190.233:2222, at first glance harmless, but in the code we see that it points to a rather suspicious .JS.

When we deofuscate and clean, a hidden URL appears that could load the next stage, however I could not get it (maybe geofenced or some other trick). ImageImageImageImage
Read 7 tweets
Germán Fernández Profile picture
May 14, 2023
Some recently registered .ZIP domains 🤭 Image
I liked this one too:
/keygen.zip Image
Okeyyyyyyyyy! 😏
/microsoft-office.zip Image
Read 7 tweets
Germán Fernández Profile picture
Mar 20, 2023
1/ Part of the script used by #TA569 (Initial Access Broker) to inject the Keitaro TDS code into compromised sites 🚩

In this variant, if the IP is correct and the red_ok cookie is not declared, the injection is shown and the infection flow continues until #SocGholish or others. ImageImageImage
2/ Two #KeitaroTDS domains in use by #TA569:
- jqueryns[.]com
- jqscr[.]com "new"

In the IP of the latter there is also the domain jqueryj[.]com with a panel that at first sight I cannot recognize 🧐 but is some kind of bot/stealer/clipper, very likely related. / @ViriBack ImageImageImageImage
3/ To get an idea of the scope, if we search on publicwww for the domain "jqueryns[.]com" we get 2196 infected sites, for the domain "jqscr[.]com" we get another 196 compromised sites so far.

- publicwww.com/websites/%22jq…
- publicwww.com/websites/%22jq…

More results in Google too 🤦‍♂️ ImageImageImageImage
Read 5 tweets
Germán Fernández Profile picture
Feb 27, 2023
1/ Entonces, "kung_liao" un nuevo actor de amenazas logró acceso y expuso información privada de varias empresas Chilenas 🇨🇱

1) DIGITALPROSERVER.COM | 21/01/23
2) TESORERIA.CL | 03/02/23
3) CMFCHILE.CL | 12/02/23
4) ARKAVIA.COM | 15/02/23
2/ Para DIGITALPROSERVER.COM, el atacante indica que vende acceso a más de 500 DBs y sitios que incluyen importantes medios digitales, noticieros, radios, etc.

Como muestra, el atacante publicó credenciales y una de las Webshell que tenía instalada en El Mostrador (reportado)
3/ Para TESORERIA.CL, el atacante al parecer explotó una vulnerabilidad de Inyección SQL y además obtuvo acceso a la Intranet a través de la VPN.

Una de las evidencias muestra al atacante modificando información personal de una persona de apellido "Piñera Echenique".
Read 6 tweets
Germán Fernández Profile picture
Jan 21, 2023
1/ DEV-0569, current distribution via #GoogleAds.

1.- #Gozi aka #Ursnif (bot) ↓
2.- #RedLine (stealer) ↓
And if the conditions are right, possibly:
3.- #CobaltStrike (C2) ↓
4.- #Royal Ransomware 💥

(No more BatLoader in the infection chain)
2/ For deployment, they use Add-MpPreference to configure exclusions in Windows Defender (extensions, paths and processes), #NSudo to launch binaries with full privileges and #GnuPG to encrypt the payloads.

Initial MSI file has 0 hits in VT.
3/ All payloads are hosted on @Bitbucket, in a repository that was created in August 2022.

In just 3 days, #Gozi and #RedLine have been downloaded 2477 and 2503 times respectively.

ZLocal.gpg has been downloaded more than 48193 times since December 24, 2022 (potential victims).
Read 10 tweets

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