Overview

overview

10

Static

static

10

my_sss.exe

windows11-ltsc_2024-x64

9

Sharing

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General

  • Target
    my_sss.bin
  • Size 277KB
  • Sample260803-wk8fqagq2v
  • SHA256 a49d28cc6105788ece1a14eae44204c90018a0ff43d8e057c81d60e9640f3e3b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
persistence

Malware Config

Targets

    • Target
      my_sss.bin
    • Size 277KB
    • SHA256 a49d28cc6105788ece1a14eae44204c90018a0ff43d8e057c81d60e9640f3e3b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    persistence

    • .NET loader stage by imphash + section/import shape

    • CLR-hosted .NET infostealer: reflective assembly + browser cred theft + AES socket exfil

    • CLR-hosting MZER loader stage (my_sss.bin / student_s.bin), ~276KB

    • ClickFix v8 — MZER custom loader stub with x64 PIC bootstrapper

    • ClickFix v8 — Suspicious named pipes: CPFATP_ (CLR profiler abuse) / Sessions

    • Donut .NET loader by imphash — stable across all waves/branches despite per-lure SHA-256 churn

    • Fires on any WP-002 chain component

    • MZER polyglot header: position-independent Donut shellcode masquerading as PE (cross-version cluster

    • MZER polyglot: MZ-lookalike header that is also a GetPC self-locating x64 stub

    • MZER-polyglot Donut loader family: header + GetPC bootstrap prologue at offset 0

    • NEW in V12.1: native MinGW-w64/GCC-15 WinHTTP downloader stage fetching enterprise/student_s.bin

    • Native PE32+ loader: process-enum + remote-thread injection + WinHTTP stage fetch

    • Network IOCs for the WP-002 stage host and C2 gate

    • V12.1 infra: new stage-2 IP, recycled V11 C2 domain, TDS, lure host, EtherHiding contract

    • WinHTTP downloader by imphash — durable cross-wave-cluster pivot

    • WinHTTP downloader/injector MZER stage, ~50KB

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Downloads MZ/PE file

    • Drops desktop.ini file(s)

    behavioral1

MITRE ATT&CK Enterprise v16

Tasks