General

  • Target

    19dd27417ae1f888610c8faaf0d5b8c02cf3c2f5c0b200c918070eab3ed36b03

  • Size

    781KB

  • Sample

    211021-elsyzsafhk

  • MD5

    4cf3c23a286cf0c75c30a6935f4b73e6

  • SHA1

    fa1bef157cf40726f9c228157f7637e0fe14d1c4

  • SHA256

    19dd27417ae1f888610c8faaf0d5b8c02cf3c2f5c0b200c918070eab3ed36b03

  • SHA512

    f07218c97f728c7bb4f59278620abfa94d3f3ad0b11a5b1bfe2cc83de5a4d70bd247e92f7ef3551a8f070e336f6a0edb4f729f461b113fa27f27eae1992301de

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

      19dd27417ae1f888610c8faaf0d5b8c02cf3c2f5c0b200c918070eab3ed36b03

    • Size

      781KB

    • MD5

      4cf3c23a286cf0c75c30a6935f4b73e6

    • SHA1

      fa1bef157cf40726f9c228157f7637e0fe14d1c4

    • SHA256

      19dd27417ae1f888610c8faaf0d5b8c02cf3c2f5c0b200c918070eab3ed36b03

    • SHA512

      f07218c97f728c7bb4f59278620abfa94d3f3ad0b11a5b1bfe2cc83de5a4d70bd247e92f7ef3551a8f070e336f6a0edb4f729f461b113fa27f27eae1992301de

    • 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