General

  • Target

    f3ccad9301556e9bd0d1588af9a32d4f5b0d784c8d6d59ff631667ffb30a2ba1

  • Size

    840KB

  • Sample

    211207-nzqkfshadl

  • MD5

    e9734e7b1306b9b2bbfe038570882890

  • SHA1

    7b1723468dba22ff5299e9df10fb7f880fa4cb6c

  • SHA256

    f3ccad9301556e9bd0d1588af9a32d4f5b0d784c8d6d59ff631667ffb30a2ba1

  • SHA512

    050f5a8dc2e5fc24c0b8564712b8783d9029f9d85945d16dc507aad0a317493b4d36574c2906ebe7a975e1d92265fd54562369c486afbf63954f0bf3603f03b6

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes
  • extension

    .wnlu

  • offline_id

    gYuqQ5GsAaJom08TivUVhlPzZDKd916x4NcXrWt1

  • payload_url

    http://kotob.top/dl/build2.exe

    http://tzgl.org/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-m8LBBi8x8F Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: manager@mailtemp.ch Reserve e-mail address to contact us: helprestoremanager@airmail.cc Your personal ID: 0357Sigrj

rsa_pubkey.plain

Extracted

Family

vidar

Version

49

Botnet

517

C2

https://mstdn.social/@sergeev43

https://koyu.space/@sergeev45

Attributes
  • profile_id

    517

Targets

    • Target

      f3ccad9301556e9bd0d1588af9a32d4f5b0d784c8d6d59ff631667ffb30a2ba1

    • Size

      840KB

    • MD5

      e9734e7b1306b9b2bbfe038570882890

    • SHA1

      7b1723468dba22ff5299e9df10fb7f880fa4cb6c

    • SHA256

      f3ccad9301556e9bd0d1588af9a32d4f5b0d784c8d6d59ff631667ffb30a2ba1

    • SHA512

      050f5a8dc2e5fc24c0b8564712b8783d9029f9d85945d16dc507aad0a317493b4d36574c2906ebe7a975e1d92265fd54562369c486afbf63954f0bf3603f03b6

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

      suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

      suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • Vidar Stealer

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Tasks