General

  • Target

    8a152fafb45bac4e1e02ecbaffe29d624d8457c431dd4eae67dd5a860cef1a47

  • Size

    7.9MB

  • Sample

    240929-ag1e2ssbkj

  • MD5

    198317942e11f130d2c6f869e4b7d2f5

  • SHA1

    388a20318efa184a8e0fdb62db76ec071dc7ed22

  • SHA256

    8a152fafb45bac4e1e02ecbaffe29d624d8457c431dd4eae67dd5a860cef1a47

  • SHA512

    d437db9a575d883ff29f0d2968b762e255f619ce9a84d09eb77bca94e5b5481a4200ef80657f8e8ef5f8f134b17fd65da4a3063710bf4b222b8060464935fb53

  • SSDEEP

    196608:qTZYpV3/wqqL0xvyMfcAJook0smCeWRe/HYupM/Qlrd:R/wp0xv7kl5s/H36ol

Malware Config

Extracted

Family

asyncrat

Version

L838 RAT v1.0.0

Botnet

Default

C2

127.0.0.1:54984

l838.ddns.net:54984

Mutex

vmtizbfedz

Attributes
  • delay

    3

  • install

    true

  • install_file

    WindowsSmartScanner.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family

xworm

C2

127.0.0.1:3232

l838.ddns.net:3232

Attributes
  • Install_directory

    %AppData%

  • install_file

    WindowsSecurityWrapper.exe

Targets

    • Target

      8a152fafb45bac4e1e02ecbaffe29d624d8457c431dd4eae67dd5a860cef1a47

    • Size

      7.9MB

    • MD5

      198317942e11f130d2c6f869e4b7d2f5

    • SHA1

      388a20318efa184a8e0fdb62db76ec071dc7ed22

    • SHA256

      8a152fafb45bac4e1e02ecbaffe29d624d8457c431dd4eae67dd5a860cef1a47

    • SHA512

      d437db9a575d883ff29f0d2968b762e255f619ce9a84d09eb77bca94e5b5481a4200ef80657f8e8ef5f8f134b17fd65da4a3063710bf4b222b8060464935fb53

    • SSDEEP

      196608:qTZYpV3/wqqL0xvyMfcAJook0smCeWRe/HYupM/Qlrd:R/wp0xv7kl5s/H36ol

    • AsyncRat

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

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Async RAT payload

    • Command and Scripting Interpreter: PowerShell

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Drops file in System32 directory

    • Enumerates processes with tasklist

    • UPX packed file

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

MITRE ATT&CK Enterprise v15

Tasks