General

  • Target

    5fae11a9ddb49452b6896fd3217e9665.exe

  • Size

    730KB

  • Sample

    220805-lbcbtahfe6

  • MD5

    5fae11a9ddb49452b6896fd3217e9665

  • SHA1

    a642378099d0ac4e1dc3e0abe98b12bee1992e1d

  • SHA256

    12471d61dc844208bdbe23a9749980cf1a40ad45f844449afe55fb0f1cbbda0b

  • SHA512

    8244571ab072b89fe10c6c8a78b0f3b62c6833054d40b327c51583cc247d1e13f8dbf4e8367ce3672a5c5c14de8b53fcc7969bb6d78f4232ebebe77d460768ac

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test2/get.php

Attributes
  • extension

    .vvyu

  • offline_id

    rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1

  • payload_url

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

    http://acacaca.org/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-QsoSRIeAK6 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@bestyourmail.ch Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0531Jhyjd

rsa_pubkey.plain

Targets

    • Target

      5fae11a9ddb49452b6896fd3217e9665.exe

    • Size

      730KB

    • MD5

      5fae11a9ddb49452b6896fd3217e9665

    • SHA1

      a642378099d0ac4e1dc3e0abe98b12bee1992e1d

    • SHA256

      12471d61dc844208bdbe23a9749980cf1a40ad45f844449afe55fb0f1cbbda0b

    • SHA512

      8244571ab072b89fe10c6c8a78b0f3b62c6833054d40b327c51583cc247d1e13f8dbf4e8367ce3672a5c5c14de8b53fcc7969bb6d78f4232ebebe77d460768ac

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • 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 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

Persistence

Registry Run Keys / Startup Folder

1
T1060

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