General

  • Target

    da9f5ba2db6f3bc55e1d61c7d825408ca3e2c28f715c0add096c21db94ae396b

  • Size

    685KB

  • Sample

    210915-je915sdbeq

  • MD5

    96251661dfab7c52e2eb1a6639c15b77

  • SHA1

    217fcb39dd0fdcabb741b80a6a97ccbd9bb17e67

  • SHA256

    da9f5ba2db6f3bc55e1d61c7d825408ca3e2c28f715c0add096c21db94ae396b

  • SHA512

    f157af5d41b09dd9e33533e66b4dd173429691acca7570fc7fe6444c41aa40614466f9c0e1e80e3a58643c5e5c38c49d952416ab7c302e4efb029b50f0ea233e

Malware Config

Extracted

Family

vidar

Version

40.6

Botnet

517

C2

https://dimonbk83.tumblr.com/

Attributes
  • profile_id

    517

Targets

    • Target

      da9f5ba2db6f3bc55e1d61c7d825408ca3e2c28f715c0add096c21db94ae396b

    • Size

      685KB

    • MD5

      96251661dfab7c52e2eb1a6639c15b77

    • SHA1

      217fcb39dd0fdcabb741b80a6a97ccbd9bb17e67

    • SHA256

      da9f5ba2db6f3bc55e1d61c7d825408ca3e2c28f715c0add096c21db94ae396b

    • SHA512

      f157af5d41b09dd9e33533e66b4dd173429691acca7570fc7fe6444c41aa40614466f9c0e1e80e3a58643c5e5c38c49d952416ab7c302e4efb029b50f0ea233e

    • 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