General

  • Target

    b8ef97afa17bcf32d4d3218fdffd52239437575309e94313095fbd845260bc9d

  • Size

    864KB

  • Sample

    211022-r7sasscffn

  • MD5

    46d54bcf91327754f698cb58d8d45ac4

  • SHA1

    0c962484b0e06d82865eb8607f0cb3dc81415611

  • SHA256

    b8ef97afa17bcf32d4d3218fdffd52239437575309e94313095fbd845260bc9d

  • SHA512

    0d1e508e5f98327cec95e3b8df07772d7d031dd858ec233f24b6224b496748099b51dc18e2e6eba94830af3d0dfdc3abd50a28453681f2cea47cc8304c292540

Malware Config

Extracted

Family

vidar

Version

41.5

Botnet

517

C2

https://mas.to/@xeroxxx

Attributes
  • profile_id

    517

Extracted

Family

djvu

C2

http://rlrz.org/lancer

Targets

    • Target

      b8ef97afa17bcf32d4d3218fdffd52239437575309e94313095fbd845260bc9d

    • Size

      864KB

    • MD5

      46d54bcf91327754f698cb58d8d45ac4

    • SHA1

      0c962484b0e06d82865eb8607f0cb3dc81415611

    • SHA256

      b8ef97afa17bcf32d4d3218fdffd52239437575309e94313095fbd845260bc9d

    • SHA512

      0d1e508e5f98327cec95e3b8df07772d7d031dd858ec233f24b6224b496748099b51dc18e2e6eba94830af3d0dfdc3abd50a28453681f2cea47cc8304c292540

    • 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

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

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