General

  • Target

    XClientB.exe

  • Size

    85KB

  • Sample

    241205-hkh9yatjcz

  • MD5

    a95c8560300ac51832c9baeca525230f

  • SHA1

    a04977f02be0dfd0a9af69a093f795468c1a7e30

  • SHA256

    1155ac9e41e46a3a870453570101bee1cfa164435847972c46ebfa70bc336a55

  • SHA512

    c53ea3ec545f4bde2828866fb96c61490c4a28bec0c01310a252f21908063f7a46b69f76f8327fa96234f04a9c661ad7f1fca3fc16f3b2bad68c0f64f96958be

  • SSDEEP

    1536:2inzt6mDiPKA7AIBdUZlouGQ68btAIzGNcrOlAy6TR7OybKExKN7:2ih7wX0vl68bOImcr9R7OaKES7

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %Temp%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/vJmE27fr

  • telegram

    https://api.telegram.org/bot7414557379:AAHJMIrSP_hoR0jelLf8igel3SZxGY860qU/sendMessage?chat_id=2076906822

Extracted

Family

xworm

Version

3.0

C2

plus-loves.gl.at.ply.gg:59327

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

Extracted

Family

gurcu

C2

https://api.telegram.org/bot7414557379:AAHJMIrSP_hoR0jelLf8igel3SZxGY860qU/sendMessage?chat_id=2076906822

Targets

    • Target

      XClientB.exe

    • Size

      85KB

    • MD5

      a95c8560300ac51832c9baeca525230f

    • SHA1

      a04977f02be0dfd0a9af69a093f795468c1a7e30

    • SHA256

      1155ac9e41e46a3a870453570101bee1cfa164435847972c46ebfa70bc336a55

    • SHA512

      c53ea3ec545f4bde2828866fb96c61490c4a28bec0c01310a252f21908063f7a46b69f76f8327fa96234f04a9c661ad7f1fca3fc16f3b2bad68c0f64f96958be

    • SSDEEP

      1536:2inzt6mDiPKA7AIBdUZlouGQ68btAIzGNcrOlAy6TR7OybKExKN7:2ih7wX0vl68bOImcr9R7OaKES7

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Dcrat family

    • Detect Xworm Payload

    • Gurcu family

    • Gurcu, WhiteSnake

      Gurcu aka WhiteSnake is a malware stealer written in C#.

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • 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 computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • 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.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks