General

  • Target

    3116fc48d99152af500d61530aaeae6e54417fab544464a9f3b2e44a271445a4

  • Size

    804KB

  • Sample

    211022-d3d1qabhhq

  • MD5

    5645efc0619fcbc9e1682885ec2e36d2

  • SHA1

    a6097c93fbe6b6ef6d6b24279d1a767875036a1e

  • SHA256

    3116fc48d99152af500d61530aaeae6e54417fab544464a9f3b2e44a271445a4

  • SHA512

    e4a5cfe688bcfc03008b706ce8ca05dd8a8f813046e997fb2c51110b670ffd312a20c67facbc74ad2b7805bdf6ad12566eae070e885312115385cfd7e0ab7cef

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/fhsgtsspen6

Targets

    • Target

      3116fc48d99152af500d61530aaeae6e54417fab544464a9f3b2e44a271445a4

    • Size

      804KB

    • MD5

      5645efc0619fcbc9e1682885ec2e36d2

    • SHA1

      a6097c93fbe6b6ef6d6b24279d1a767875036a1e

    • SHA256

      3116fc48d99152af500d61530aaeae6e54417fab544464a9f3b2e44a271445a4

    • SHA512

      e4a5cfe688bcfc03008b706ce8ca05dd8a8f813046e997fb2c51110b670ffd312a20c67facbc74ad2b7805bdf6ad12566eae070e885312115385cfd7e0ab7cef

    • 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