General

  • Target

    b079c6516f2af0c4ac9b6a14e854b9b7b9a8fe22313df632c44623a9252d7ca5

  • Size

    775KB

  • Sample

    211025-skk4mshbhn

  • MD5

    368a65200df464ebc660a125ccca5671

  • SHA1

    d2b4335c2770c3ef5af3a8351f1fe2e448c5cbee

  • SHA256

    b079c6516f2af0c4ac9b6a14e854b9b7b9a8fe22313df632c44623a9252d7ca5

  • SHA512

    d8b9fa82d730a51d2b6e493fa0c144026d14082d9c2635a8b8836531fdc2941efe0b4be0299089279adfdace3955cdffd6c1e700552bec65aa1f0cd5a4e19336

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/lancer

Targets

    • Target

      b079c6516f2af0c4ac9b6a14e854b9b7b9a8fe22313df632c44623a9252d7ca5

    • Size

      775KB

    • MD5

      368a65200df464ebc660a125ccca5671

    • SHA1

      d2b4335c2770c3ef5af3a8351f1fe2e448c5cbee

    • SHA256

      b079c6516f2af0c4ac9b6a14e854b9b7b9a8fe22313df632c44623a9252d7ca5

    • SHA512

      d8b9fa82d730a51d2b6e493fa0c144026d14082d9c2635a8b8836531fdc2941efe0b4be0299089279adfdace3955cdffd6c1e700552bec65aa1f0cd5a4e19336

    • 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