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Resubmissions

21/03/2025, 00:27

250321-ar3m6a1sgw 10

20/03/2025, 18:47

250320-xfdk8awzdy 10

General

  • Target

    READ ME BEFOR OPEN.txt.exe

  • Size

    84KB

  • Sample

    250320-xfdk8awzdy

  • MD5

    5f8d77b4baf223ecde7556b0c1f63c89

  • SHA1

    176ca0ebec13e5d80ce348204532612744735107

  • SHA256

    159c1154b8553b15f7feebbb129b1a69ce1f24dea85e2837ad84160e1ce6dc5c

  • SHA512

    befa25607d25902859dbb339e69d64d89e98264c88e848f2ed2b5c20aa7865b0e05658d4299deeb1aa9e79f3e58c2df61becb53285f857c0dc7a93091f864549

  • SSDEEP

    1536:HEe2sHTvN2b4p98BcYCXSg0qMl3nRgt5P7ZJUqAA/WkywGKwkvOWkVqkl:72W0n4lEl3RE5veV2W3

Malware Config

Extracted

Family

xworm

C2

looking-brings.gl.at.ply.gg:65381

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    USB.exe

  • telegram

    https://api.telegram.org/bot8074871433:AAGd-vCZQOlCC_n2SUFT-qQ6fFThcBVDd1Y

Extracted

Family

gurcu

C2

https://api.telegram.org/bot8074871433:AAGd-vCZQOlCC_n2SUFT-qQ6fFThcBVDd1Y/sendMessage?chat_id=1002422094535

Targets

    • Target

      READ ME BEFOR OPEN.txt.exe

    • Size

      84KB

    • MD5

      5f8d77b4baf223ecde7556b0c1f63c89

    • SHA1

      176ca0ebec13e5d80ce348204532612744735107

    • SHA256

      159c1154b8553b15f7feebbb129b1a69ce1f24dea85e2837ad84160e1ce6dc5c

    • SHA512

      befa25607d25902859dbb339e69d64d89e98264c88e848f2ed2b5c20aa7865b0e05658d4299deeb1aa9e79f3e58c2df61becb53285f857c0dc7a93091f864549

    • SSDEEP

      1536:HEe2sHTvN2b4p98BcYCXSg0qMl3nRgt5P7ZJUqAA/WkywGKwkvOWkVqkl:72W0n4lEl3RE5veV2W3

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Detect Xworm Payload

    • Disables service(s)

    • Gurcu family

    • Gurcu, WhiteSnake

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

    • Modifies Windows Defender DisableAntiSpyware settings

    • Modifies security service

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Modifies Windows Firewall

    • Possible privilege escalation attempt

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Stops running service(s)

    • Drops startup file

    • Executes dropped EXE

    • Modifies file permissions

    • Adds Run key to start application

    • Enumerates connected drives

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

    • File and Directory Permissions Modification: Windows File and Directory Permissions Modification

    • 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.

    • Network Share Discovery

      Attempt to gather information on host network.

    • 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.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks