General

  • Target

    file.exe

  • Size

    145KB

  • Sample

    221006-e5dcmsgfak

  • MD5

    cb8f25cb414b4a08471ee5e140be28e7

  • SHA1

    74587cc5fdc2264f2ec7c0137c7fb46550fdf8fe

  • SHA256

    d29b6f793a225fcaec68f151994a8d7f94349acd027e76043b1c924428983f30

  • SHA512

    51afd8a6739b1da0e079382d8fde41e53dbe21843b4711a55463642c80d447ec65dc7e745dc1048c6f9e4bbb2eaaf22190e21cc65c7b3826986135eb3cdd6f04

  • SSDEEP

    3072:70pr0e++RvCkaEYTiE8YeFhOpWiiHUIcpYI5EWO:YqMvCvEYTiCpraUfWuH

Malware Config

Extracted

Family

djvu

C2

http://winnlinne.com/lancer/get.php

Attributes
  • extension

    .adww

  • offline_id

    z8lhl4oForVEc7gy9Ra8rSqjYMl3xiFRuIW4not1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://winnlinne.com/files/1/build3.exe

  • ransomnote

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rsa_pubkey.plain

Extracted

Family

vidar

Version

54.9

Botnet

517

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Targets

    • Target

      file.exe

    • Size

      145KB

    • MD5

      cb8f25cb414b4a08471ee5e140be28e7

    • SHA1

      74587cc5fdc2264f2ec7c0137c7fb46550fdf8fe

    • SHA256

      d29b6f793a225fcaec68f151994a8d7f94349acd027e76043b1c924428983f30

    • SHA512

      51afd8a6739b1da0e079382d8fde41e53dbe21843b4711a55463642c80d447ec65dc7e745dc1048c6f9e4bbb2eaaf22190e21cc65c7b3826986135eb3cdd6f04

    • SSDEEP

      3072:70pr0e++RvCkaEYTiE8YeFhOpWiiHUIcpYI5EWO:YqMvCvEYTiCpraUfWuH

    • Detected Djvu ransomware

    • Detects Smokeloader packer

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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 Microsoft Outlook profiles

    • 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.

    • Legitimate hosting services abused for malware hosting/C2

    • 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

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Command and Control

Web Service

1
T1102

Tasks