General

  • Target

    e9c5b6396a91553256817b830cf2d1fc509ba926754f007088add0698d152877

  • Size

    721KB

  • Sample

    210915-hfd5esdaep

  • MD5

    ec687802910d091a6538b620560eb07c

  • SHA1

    90181b23ddf06d2c570781295b9b3cf1c2aa651f

  • SHA256

    e9c5b6396a91553256817b830cf2d1fc509ba926754f007088add0698d152877

  • SHA512

    6c080beadc200da2dc392f2e77086f902eb6829c245b932f273e426a1964b435b66485d0d6e1336f955f072e0b71a824483829f226ca37834694b15fe5613684

Malware Config

Extracted

Family

vidar

Version

40.6

Botnet

517

C2

https://dimonbk83.tumblr.com/

Attributes
  • profile_id

    517

Targets

    • Target

      e9c5b6396a91553256817b830cf2d1fc509ba926754f007088add0698d152877

    • Size

      721KB

    • MD5

      ec687802910d091a6538b620560eb07c

    • SHA1

      90181b23ddf06d2c570781295b9b3cf1c2aa651f

    • SHA256

      e9c5b6396a91553256817b830cf2d1fc509ba926754f007088add0698d152877

    • SHA512

      6c080beadc200da2dc392f2e77086f902eb6829c245b932f273e426a1964b435b66485d0d6e1336f955f072e0b71a824483829f226ca37834694b15fe5613684

    • 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