General

  • Target
    Inq PO-000202120741.doc
  • Size 535KB
  • Sample210930-ktl4ashbdm
  • SHA256 29327d8089389d96e7ae1abcbd7c300ab587c59fa5841b748ef47e279d0c526b
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    httP://avira.ydns.eu/EXCEL.exe

Extracted

Family
  • xpertrat

Version
  • 3.0.10

Botnet
  • Test

C2
  • kapasky-antivirus.firewall-gateway.net:4000

Mutex
  • L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0

Targets

    • Target
      Inq PO-000202120741.doc
    • Size 535KB
    • SHA256 29327d8089389d96e7ae1abcbd7c300ab587c59fa5841b748ef47e279d0c526b
    • MD5 SHA1 SHA512
    • Process spawned unexpected child process

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

    • UAC bypass

    • Windows security bypass

    • XpertRAT

      XpertRAT is a remote access trojan with various capabilities.

    • XpertRAT Core Payload

    • Adds policy Run key to start application

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks