General

  • Target

    771b28571abbec406a7ae4d65360b834f0edf2b09efb1e22b74deecff8a1acf7

  • Size

    1.8MB

  • Sample

    240601-tw5g4ahb89

  • MD5

    37c74bc9ea891d22e5c901333c88b219

  • SHA1

    35465f499639a5041e2e3cbcf1896214c7162263

  • SHA256

    771b28571abbec406a7ae4d65360b834f0edf2b09efb1e22b74deecff8a1acf7

  • SHA512

    18a902ca774705663f8de2840e8cf1a1d52bbebe706fd2535c6983772a2d99e549f89c12cf219e385bcf4d407af1157920a9a6189868aa8ed9f6b2c90973c69d

  • SSDEEP

    49152:FwwCbUERKwSf3WweLAYiBwTX6xmD0Wug2ia:Fw7bUGKwSf3WwSxiBFi8

Malware Config

Extracted

Family

amadey

Version

4.21

Botnet

49e482

C2

http://147.45.47.70

Attributes
  • install_dir

    1b29d73536

  • install_file

    axplont.exe

  • strings_key

    4d31dd1a190d9879c21fac6d87dc0043

  • url_paths

    /tr8nomy/index.php

rc4.plain

Extracted

Family

asyncrat

Version

AsyncRAT

Botnet

Fresh

C2

pepecasas123.net:4608

Mutex

AsyncMutex_5952

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Extracted

Family

asyncrat

Version

AsyncRAT

Botnet

Fresh run

C2

pepecasas123.net:4609

Mutex

AsyncMutex_2952

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      771b28571abbec406a7ae4d65360b834f0edf2b09efb1e22b74deecff8a1acf7

    • Size

      1.8MB

    • MD5

      37c74bc9ea891d22e5c901333c88b219

    • SHA1

      35465f499639a5041e2e3cbcf1896214c7162263

    • SHA256

      771b28571abbec406a7ae4d65360b834f0edf2b09efb1e22b74deecff8a1acf7

    • SHA512

      18a902ca774705663f8de2840e8cf1a1d52bbebe706fd2535c6983772a2d99e549f89c12cf219e385bcf4d407af1157920a9a6189868aa8ed9f6b2c90973c69d

    • SSDEEP

      49152:FwwCbUERKwSf3WweLAYiBwTX6xmD0Wug2ia:Fw7bUGKwSf3WwSxiBFi8

    • Amadey

      Amadey bot is a simple trojan bot primarily used for collecting reconnaissance information.

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Modifies firewall policy service

    • PrivateLoader

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

    • UAC bypass

    • Windows security bypass

    • Async RAT payload

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

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

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

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • 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

    • Reads user/profile data of web browsers

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

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Windows security modification

    • 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

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks