General

  • Target

    d8b90b839c8dd68930ca51f186862379ae35f199e71bc26ba6619848fa4d693e

  • Size

    808KB

  • Sample

    211019-nl9feagfcp

  • MD5

    b75c31ec00658d363c53144c18cd074f

  • SHA1

    293500d58f3109de8f08f5e99b8a192839f3df86

  • SHA256

    d8b90b839c8dd68930ca51f186862379ae35f199e71bc26ba6619848fa4d693e

  • SHA512

    d404f8c73b2771a9cb4dac6bfca007e0b74013b757b2e1fa538eb4c54e47322c81e27fe3d0e5c8fefef166dde8e9e7552ab47269d0a0228f3c8bd65788c86903

Malware Config

Extracted

Family

vidar

Version

41.3

Botnet

517

C2

https://mas.to/@oleg98

Attributes
  • profile_id

    517

Extracted

Family

djvu

C2

http://rlrz.org/fhsgtsspen6

Targets

    • Target

      d8b90b839c8dd68930ca51f186862379ae35f199e71bc26ba6619848fa4d693e

    • Size

      808KB

    • MD5

      b75c31ec00658d363c53144c18cd074f

    • SHA1

      293500d58f3109de8f08f5e99b8a192839f3df86

    • SHA256

      d8b90b839c8dd68930ca51f186862379ae35f199e71bc26ba6619848fa4d693e

    • SHA512

      d404f8c73b2771a9cb4dac6bfca007e0b74013b757b2e1fa538eb4c54e47322c81e27fe3d0e5c8fefef166dde8e9e7552ab47269d0a0228f3c8bd65788c86903

    • 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