General

  • Target

    eb10f1dbbdbb6677fb802ed74934112d9fb7217b43504b8c2c57a51302d43ebe

  • Size

    832KB

  • Sample

    210727-lm5tlmqlss

  • MD5

    a2593d43a60389e0af9dc123dec40247

  • SHA1

    169c84356b7f0f38d7e3bb96d5df42b099fbb8fb

  • SHA256

    eb10f1dbbdbb6677fb802ed74934112d9fb7217b43504b8c2c57a51302d43ebe

  • SHA512

    9cf38ab2c5b8d819ec06a0f1c8e5e5c716e1b8bbb17dabaaffefd2b59e0f8ee337dfd5d556480a6798c29ac7cd44edb194b1685e736148e36e6d5325ee34c3de

Malware Config

Extracted

Family

vidar

Version

39.7

Botnet

517

C2

https://shpak125.tumblr.com/

Attributes
  • profile_id

    517

Targets

    • Target

      eb10f1dbbdbb6677fb802ed74934112d9fb7217b43504b8c2c57a51302d43ebe

    • Size

      832KB

    • MD5

      a2593d43a60389e0af9dc123dec40247

    • SHA1

      169c84356b7f0f38d7e3bb96d5df42b099fbb8fb

    • SHA256

      eb10f1dbbdbb6677fb802ed74934112d9fb7217b43504b8c2c57a51302d43ebe

    • SHA512

      9cf38ab2c5b8d819ec06a0f1c8e5e5c716e1b8bbb17dabaaffefd2b59e0f8ee337dfd5d556480a6798c29ac7cd44edb194b1685e736148e36e6d5325ee34c3de

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

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

    • 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/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