General

  • Target

    New Text Document.bin.zip

  • Size

    1KB

  • Sample

    240823-k94chsybrp

  • MD5

    c1d15f5c6e8099ce9daa77d42d4cb34c

  • SHA1

    14afb6f65031e76786315997c6a3e99cbb95f854

  • SHA256

    e904cab0fe9c0b2f8e6dd9dba4dd54fe928749d28ff4520d76d44ef41a112f12

  • SHA512

    34c6f73d7ad43955f1b39299b47debf3db2444bf1078cd6dc892a69cb97245c60443bb5c0eebd4ac761181116899392767abf1741f931366fd92cebe18b41cbe

Malware Config

Extracted

Family

metasploit

Version

metasploit_stager

C2

74.235.106.69:4444

Extracted

Family

stealc

Botnet

default

C2

http://46.8.231.109

Attributes
  • url_path

    /c4754d4f680ead72.php

Extracted

Family

vidar

Version

10.8

Botnet

3cd4672c6baedc17edab0cb86e9453d1

C2

https://t.me/jamelwt

https://steamcommunity.com/profiles/76561199761128941

https://t.me/iyigunl

Attributes
  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Extracted

Family

xworm

C2

127.0.0.1:1234

143.198.208.124:1234

Attributes
  • Install_directory

    %Temp%

  • install_file

    XClient.exe

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.101.172:9674

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Log

  • keylog_path

    %Temp%

  • mouse_option

    false

  • mutex

    Rmc-54ZTI0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

xworm

Version

5.0

C2

95.98.144.201:2404

Mutex

txQ2MAplfLfxnmW3

Attributes
  • Install_directory

    %AppData%

  • install_file

    e45iasd.exe

  • telegram

    https://api.telegram.org/bot6421494903:AAFuoWigwh2-oDYMZFAWqzFsbHJABidzW1Q

aes.plain
aes.plain

Extracted

Family

stealc

Botnet

nord

C2

http://185.215.113.100

Attributes
  • url_path

    /e2b1563c6670f193.php

Targets

    • Target

      New Text Document.bin

    • Size

      4KB

    • MD5

      a239a27c2169af388d4f5be6b52f272c

    • SHA1

      0feb9a0cd8c25f01d071e9b2cfc2ae7bd430318c

    • SHA256

      98e895f711226a32bfab152e224279d859799243845c46e550c2d32153c619fc

    • SHA512

      f30e1ff506cc4d729f7e24aa46e832938a5e21497f1f82f1b300d47f45dae7f1caef032237ef1f5ae9001195c43c0103e3ab787f9196c8397846c1dea8f351da

    • SSDEEP

      48:6r1huik0xzYGJZZJOQOulbfSqXSfbNtm:IIxcLpf6zNt

    • Detect Vidar Stealer

    • Detect Xworm Payload

    • MetaSploit

      Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • SectopRAT

      SectopRAT is a remote access trojan first seen in November 2019.

    • SectopRAT payload

    • Stealc

      Stealc is an infostealer written in C++.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

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

    • Creates new service(s)

    • Downloads MZ/PE file

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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.

    • UPX packed file

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

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • 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

    • Looks up external IP address via web service

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

    • 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.

    • Enumerates processes with tasklist

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks