General

  • Target

    bc344fa8dbd94f5389ffa55482ad2a9eae87b440002fdded287e838264982fc4

  • Size

    169KB

  • Sample

    220923-ht2gwahddr

  • MD5

    b5743d736182e9f8bccdb2f961b055ea

  • SHA1

    a7f495b07c2be124f46a74995d62e87dc1ebdad1

  • SHA256

    bc344fa8dbd94f5389ffa55482ad2a9eae87b440002fdded287e838264982fc4

  • SHA512

    8e0d8ded1b0a4f13bc9b91430dddad8dcbcea6c684eeab5ffde2b93ce7f569e62c6526a0cef8b5eba23c2d0fd46b49b1036baa46cd294df8d714394abc838198

  • SSDEEP

    3072:kJKLTp55WvFo5J0VWXhj8K/FpHagmNBAuBM/PkW4n:TLTFtYWXBHaF

Malware Config

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .ofww

  • offline_id

    xkNzhkB1wvgoDI7Uo0HPNLY3qCuwoFpP7nlhlut1

  • 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

54.6

Botnet

517

C2

https://t.me/huobiinside

https://mas.to/@kyriazhs1975

Attributes
  • profile_id

    517

Extracted

Family

raccoon

Botnet

7394a7fc5da9794209d8b0503ca4abf4

C2

http://45.8.145.203

rc4.plain

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Extracted

Family

redline

Botnet

LogsDiller Cloud (Sup: @mr_golds)

C2

77.73.134.27:8163

Attributes
  • auth_value

    56c6f7b9024c076f0a96931453da7e56

Targets

    • Target

      bc344fa8dbd94f5389ffa55482ad2a9eae87b440002fdded287e838264982fc4

    • Size

      169KB

    • MD5

      b5743d736182e9f8bccdb2f961b055ea

    • SHA1

      a7f495b07c2be124f46a74995d62e87dc1ebdad1

    • SHA256

      bc344fa8dbd94f5389ffa55482ad2a9eae87b440002fdded287e838264982fc4

    • SHA512

      8e0d8ded1b0a4f13bc9b91430dddad8dcbcea6c684eeab5ffde2b93ce7f569e62c6526a0cef8b5eba23c2d0fd46b49b1036baa46cd294df8d714394abc838198

    • SSDEEP

      3072:kJKLTp55WvFo5J0VWXhj8K/FpHagmNBAuBM/PkW4n:TLTFtYWXBHaF

    • DcRat

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

    • Detected Djvu ransomware

    • Detects Smokeloader packer

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Raccoon

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

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • RedLine payload

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

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

    • XMRig Miner payload

    • Creates new service(s)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets service image path in registry

    • 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.

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • 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.

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

2
T1060

Scheduled Task

1
T1053

Privilege Escalation

New Service

1
T1050

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

2
T1112

File Permissions Modification

1
T1222

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

8
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks