General

  • Target

    ME77ZTVpfPe1.exe

  • Size

    360KB

  • Sample

    241020-gk97zssdnf

  • MD5

    a0a4c2e4123c895b019404faac31eea5

  • SHA1

    18254b9eda5a7d1bb9505cc46b992709029091c8

  • SHA256

    1c74716aa959672f89ca6a090cf8aee85eee235980f00cf4a1f049b265b4a836

  • SHA512

    3b6f9347cfd753607014147dddd1a60f87a8580f84caba99b72b8b319d1e7b8a52bad76a5d81653fabb083c4a037ed28e4cd4178aecde3a19b1ef419b853709c

  • SSDEEP

    6144:KIrgO6OmMo/f7DGUOodFeq4cH0RfWLN0SMJWW6vtuwFi0QRjZj:F8XGPoDeqnUR+N3fVVxM0QRjZj

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

K2D8kOjfVfBUprBZ

Attributes
  • Install_directory

    %Temp%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/BSSw6HT3

aes.plain

Extracted

Family

bdaejec

C2

ddos.dnsnb8.net

Targets

    • Target

      ME77ZTVpfPe1.exe

    • Size

      360KB

    • MD5

      a0a4c2e4123c895b019404faac31eea5

    • SHA1

      18254b9eda5a7d1bb9505cc46b992709029091c8

    • SHA256

      1c74716aa959672f89ca6a090cf8aee85eee235980f00cf4a1f049b265b4a836

    • SHA512

      3b6f9347cfd753607014147dddd1a60f87a8580f84caba99b72b8b319d1e7b8a52bad76a5d81653fabb083c4a037ed28e4cd4178aecde3a19b1ef419b853709c

    • SSDEEP

      6144:KIrgO6OmMo/f7DGUOodFeq4cH0RfWLN0SMJWW6vtuwFi0QRjZj:F8XGPoDeqnUR+N3fVVxM0QRjZj

    • Bdaejec

      Bdaejec is a backdoor written in C++.

    • Detect Xworm Payload

    • Detects Bdaejec Backdoor.

      Bdaejec is backdoor written in C++.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Xworm

      Xworm is a remote access trojan written in C#.

    • 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

    • ASPack v2.12-2.42

      Detects executables packed with ASPack v2.12-2.42

    • 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.

    • Executes dropped EXE

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks