General

  • Target

    9555d990a61b1e1468dd10b97f1a62dd79bd80b269ad034f85c84ee4193d9757

  • Size

    795KB

  • Sample

    230607-tbnzlsda8z

  • MD5

    cf3367be026435f2e603f47767c86622

  • SHA1

    30d883227c64d5f382356ddd88b259e0141ffd4d

  • SHA256

    9555d990a61b1e1468dd10b97f1a62dd79bd80b269ad034f85c84ee4193d9757

  • SHA512

    df0520c0859cbf699cffeedb0bd466d7cba14bde60289ecbda1d98be83116f0d4e07868be7fbf093a69bb94efe45384a9ef6c48ee6129ce080a8c768b5631378

  • SSDEEP

    24576:/kFxzaDWsd5H5e38I3hG6wXWQAwc/PZpo2cJ:MqDWsD0TDwma0Zp

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes
  • extension

    .nerz

  • offline_id

    0vTA6MA1m5nzrdffOCJC7YmAa4Lp6YNN8lOJ4mt1

  • payload_url

    http://colisumy.com/dl/build2.exe

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

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-vc50LyB2yb Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: support@freshmail.top Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0722JOsie

rsa_pubkey.plain

Extracted

Family

vidar

Version

4.2

Botnet

a81bcf59d85e6e13257840e65b9d1da8

C2

https://steamcommunity.com/profiles/76561199511129510

https://t.me/rechnungsbetrag

Attributes
  • profile_id_v2

    a81bcf59d85e6e13257840e65b9d1da8

  • user_agent

    Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.38 Safari/537.36 Brave/75

Targets

    • Target

      9555d990a61b1e1468dd10b97f1a62dd79bd80b269ad034f85c84ee4193d9757

    • Size

      795KB

    • MD5

      cf3367be026435f2e603f47767c86622

    • SHA1

      30d883227c64d5f382356ddd88b259e0141ffd4d

    • SHA256

      9555d990a61b1e1468dd10b97f1a62dd79bd80b269ad034f85c84ee4193d9757

    • SHA512

      df0520c0859cbf699cffeedb0bd466d7cba14bde60289ecbda1d98be83116f0d4e07868be7fbf093a69bb94efe45384a9ef6c48ee6129ce080a8c768b5631378

    • SSDEEP

      24576:/kFxzaDWsd5H5e38I3hG6wXWQAwc/PZpo2cJ:MqDWsD0TDwma0Zp

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • 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

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

3
T1005

Tasks