Resubmissions

10-01-2023 20:41

230110-zgh87she82 10

09-01-2023 13:23

230109-qmzcyahg5z 8

30-12-2022 04:52

221230-fhnqjafa36 7

29-12-2022 23:57

221229-3z3x4shg5y 8

29-12-2022 09:56

221229-lyp67afh7x 4

29-12-2022 09:28

221229-lfpspsfh5s 10

29-12-2022 04:18

221229-exfssscc88 1

29-12-2022 04:12

221229-esw9zsfd3z 8

18-12-2022 12:11

221218-pcmqqabh42 8

04-12-2022 12:48

221204-p157zaec6t 10

General

  • Target

    https://google.com

  • Sample

    221229-lfpspsfh5s

Malware Config

Extracted

Family

cryptbot

C2

http://luvmyb410.top/gate.php

Extracted

Family

darkcomet

Botnet

Guest16

C2

gameservice.ddns.net:4320

Mutex

DC_MUTEX-WBUNVXD

Attributes
  • InstallPath

    AudioDriver\taskhost.exe

  • gencode

    EWSsWwgyJrUD

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    AudioDriver

Targets

    • BlackNET

      BlackNET is an open source remote access tool written in VB.NET.

    • CryptBot

      A C++ stealer distributed widely in bundle with other software.

    • Darkcomet

      DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

    • Modifies WinLogon for persistence

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • 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.

    • 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 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

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

8
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

8
T1082

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

2
T1005

Command and Control

Web Service

1
T1102

Tasks