General

  • Target

    f81037799acf75dae40624a0b68c7e694f6f8b76eb1629f844dda9ae7d5da96b

  • Size

    151KB

  • Sample

    231207-c7anesaeb3

  • MD5

    a9e0b4cbfa91bf58868d957156d99f8f

  • SHA1

    9cb6da448399aaf3ff3ab1a371983e6bea7d46e8

  • SHA256

    19783433e7ba8f4f74655eeae792fb2b37a862c2512672ea005e49d37fd8aac8

  • SHA512

    84c76d0b8dfacda51ab56520e450ee0eaf14e5797b0e4f0c84ebe306b18358c1bcf05a67d9c21dd4c1928dd5d57ece97d9440d9dd1770d3476d7bd115f8b51fe

  • SSDEEP

    3072:ginueY2+fS2LzygBzRua5wjQJKXgmkcmNcDkCsi108gKnkybNpxbFtKU4b:gpl2+SHgB1RDKpkXNc/ebKkMNpxKU4b

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32
rc4.i32

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .nbzi

  • offline_id

    csCsb6cUvy0iMa6NgGCGH0hSfXQlGjZVEmFVkgt1

  • payload_url

    http://brusuax.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-8dGJ2tqlOd 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: datarestorehelpyou@airmail.cc Your personal ID: 0832ASdw

rsa_pubkey.plain

Extracted

Family

risepro

C2

193.233.132.51

Targets

    • Target

      f81037799acf75dae40624a0b68c7e694f6f8b76eb1629f844dda9ae7d5da96b

    • Size

      278KB

    • MD5

      27e492b391da6e407bef6dc07abd745f

    • SHA1

      6f2e8650a6d1a6369f55fd810b2e173427a4acdf

    • SHA256

      f81037799acf75dae40624a0b68c7e694f6f8b76eb1629f844dda9ae7d5da96b

    • SHA512

      8a4c97ce2015be0767b712ec9e4df3d5dc65e213b0f85028dd6e1c536a96cb5bf5ee80c313b02825228559de0a47381fb68ee9db239e094c11bde396949709a7

    • SSDEEP

      3072:s9uV33v8Km+ghoeuTUZb+yl7xOJKXgmkcmNcD55WLLV7Vdb9r6+:n3v8Km+6WGbhaKpkXNcCJDh

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect ZGRat V1

    • Detected Djvu ransomware

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • PrivateLoader

      PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

    • Raccoon

      Raccoon is an infostealer written in C++ and first seen in 2019.

    • Raccoon Stealer V2 payload

    • RisePro

      RisePro stealer is an infostealer distributed by PrivateLoader.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • ZGRat

      ZGRat is remote access trojan written in C#.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Drops startup file

    • Executes dropped EXE

    • Modifies file permissions

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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.

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

File and Directory Permissions Modification

1
T1222

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

3
T1552

Credentials In Files

3
T1552.001

Discovery

Query Registry

8
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

7
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks