General

  • Target

    796310542e9fb2886de3f8cbdf88c9fa.bin

  • Size

    39.1MB

  • Sample

    241230-byb98atkhv

  • MD5

    09606a40cfb0f13750d4d1c4e2ca90a1

  • SHA1

    f67f4387566891d9ae7ad901b0eefc56a2ae92a1

  • SHA256

    ca9a14809c618a6b3f02c5bc9b26089b703105373a4fee07db009f69befb014f

  • SHA512

    e185f13256d88409e038b2f2434b39c9b921dbd4138b0b60b08196971fc6a8d757a56a24d0dbf22b51cdfbc6e06fa9c73f6ed4489245cf58423bdab5354971cd

  • SSDEEP

    786432:Ijlwp9HcOa46EZDBZsgcEgMZTAw0D0tGWU+Zlo35CxXHAUk5Ko7ogmxN9RESEO:IRuTXRBZsBETV0cZoJCmUkd7zm3gSR

Malware Config

Extracted

Family

blackguard

C2

https://api.telegram.org/bot6540906397:AAG08fPgT-V7I17vtz49STaZEuwqXqKshuM/sendMessage?chat_id=5445185021

Targets

    • Target

      9f3b062a0f8caf16be80ac44ade55a8b8e8928ef87ae909f5d6d52aa44208193.exe

    • Size

      39.9MB

    • MD5

      796310542e9fb2886de3f8cbdf88c9fa

    • SHA1

      01dc8e64ff23db2f177e3d999c12329bfcd206d3

    • SHA256

      9f3b062a0f8caf16be80ac44ade55a8b8e8928ef87ae909f5d6d52aa44208193

    • SHA512

      73295b9cfa07432b21d1f0d0bad360460f32d7e0170dc84406a35f4dfe2b1519fdc4028299f1075385ae4ab738be1e5bfffd7335c1038e2126669834e9a50966

    • SSDEEP

      786432:Y31/CaCJz7+GWl3LNCxuEnwFho+zM77UDZiZCd08jFZJAI5E70TZFHng:URCR6GWl3LMEXFhV0KAcNjxAItjg

    • BlackGuard

      Infostealer first seen in Late 2021.

    • Blackguard family

    • Modifies security service

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xmrig family

    • xmrig

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

    • XMRig Miner payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Stops running service(s)

    • 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.

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • 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 cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

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

    • Modifies powershell logging option

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks