General

  • Target

    2b158df3b782217e02b5c436f0e00a2fc7561e95da7f2369f4fa2920cf1a20b0

  • Size

    2.9MB

  • Sample

    240603-janx4shc22

  • MD5

    9782adba2f6e0b9610833aa931234140

  • SHA1

    1c8e34d2ae389af9c123929dd45318d5e9cfdbef

  • SHA256

    2b158df3b782217e02b5c436f0e00a2fc7561e95da7f2369f4fa2920cf1a20b0

  • SHA512

    d1490181735485657af19fbfcd02c6106d96be46963d69c72aaf2331efd91f38e2bbd2886aea1e17453d5ccd08a28214fa668f046f642119ceafdd1db07c3548

  • SSDEEP

    49152:I8yJAk206NICMq5pzKRgqVzK/NgFALjKm:PBsV

Malware Config

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

amadey

Version

4.21

Botnet

9a3efc

C2

http://check-ftp.ru

Attributes
  • install_dir

    b9695770f1

  • install_file

    Dctooux.exe

  • strings_key

    1d3a0f2941c4060dba7f23a378474944

  • url_paths

    /forum/index.php

rc4.plain

Targets

    • Target

      2b158df3b782217e02b5c436f0e00a2fc7561e95da7f2369f4fa2920cf1a20b0

    • Size

      2.9MB

    • MD5

      9782adba2f6e0b9610833aa931234140

    • SHA1

      1c8e34d2ae389af9c123929dd45318d5e9cfdbef

    • SHA256

      2b158df3b782217e02b5c436f0e00a2fc7561e95da7f2369f4fa2920cf1a20b0

    • SHA512

      d1490181735485657af19fbfcd02c6106d96be46963d69c72aaf2331efd91f38e2bbd2886aea1e17453d5ccd08a28214fa668f046f642119ceafdd1db07c3548

    • SSDEEP

      49152:I8yJAk206NICMq5pzKRgqVzK/NgFALjKm:PBsV

    • 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

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

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

    • Windows security modification

    • 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.

    • Checks whether UAC is enabled

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks