01 | Tool Specifications & Architectural Profile
Qakbot (also designated QBot or Pinkslipbot) is an enterprise-class modular botnet and malware loader in continuous development since 2007. Lacking any local desktop interface, Qakbot operates as a headless DLL or in-memory shellcode module that decrypts internal payloads from obfuscated PE resources (RCDATA) using SHA1-derived RC4 keys. The malware establishes persistence via scheduled tasks or run keys, performs memory injection into native binaries such as wermgr.exe or mobsync.exe, harvests Outlook email conversations for weaponized reply-chain malspam, and communicates through a resilient multi-tier proxy architecture consisting of compromised commercial routers and web servers.
02 | Operator Interface & Configuration Struct Model
{
"headlessDescription": "Operates as a completely autonomous headless enterprise worm and loader. Operator management is conducted via multi-tiered backend control servers operated by threat actors."
}{
"description": "Encrypted binary configuration blob stored within PE resource section and decrypted into memory",
"fields": [
"0x00: 4-byte compilation timestamp / epoch counter",
"0x04: Campaign ID string (e.g., 'bb01', 'obama21', 'tr', 'tok01')",
"0x24: Array of Tier-1 C2 proxy IP addresses and TCP port entries (up to 150 entries)",
"0x3E4: Base communication delay / beacon interval (uint32_t milliseconds)",
"0x3E8: 256-byte RSA-1024 / RSA-2048 public key modulus for asymmetric payload verification",
"0x4E8: Module activation flags (Bit 0: Web-Inject, Bit 1: Email Stealer, Bit 2: SMB Spreader, Bit 3: UPnP Proxy)"
]
}03 | Internal Binary & Memory Execution Mechanics
- Architecture: Fully headless modular DLL with C/C++ core and assembly unpacking stubs.
- Resource Extraction: Core binary and configuration stored in encrypted RCDATA resources; decrypted using RC4 key derived from SHA1 hash of salt string.
- Process Injection: Employs process hollowing and Section Mapping (NtCreateSection, NtMapViewOfSection) into wermgr.exe, mobsync.exe, or svchost.exe.
- Email Harvesting: Embedded module parses MAPI and local Outlook storage files (.pst, .ost) to extract active email threads and contact books.
- Lateral Movement: Contains automated SMB brute-force engine and PsExec-style service creation module for internal network propagation.
- Anti-Analysis: Implements checks for virtualization drivers (VBoxMouse, vmmouse), analysis tools (Wireshark, Process Hacker), and Defender emulation sandboxes.
Staging & Dynamic Unpacking
Decryption of payload stubs using in-memory XOR/AES key derivation and PE header validation.
Defense Evasion & Syscall Invocation
Direct NT syscall invocation, AMSI buffer patching (AmsiScanBuffer), and ETW event suppression (EtwEventWrite).
Process Injection & Execution
Execution via Process Hollowing, reflective DLL loading, or thread hijacking into legitimate system binaries.
04 | Capability & Module Matrix
Concrete technical breakdown of functional modules implemented in the Qakbot / QBot binary:
Concrete capabilities documented: In-Memory Payload Decryption, Network Beacon Telemetry, Win32 Process Injection, System Mutex Validation.
05 | Wire Protocol & C2 Communication Framing
Multi-tiered network architecture. Infected nodes communicate with Tier-1 proxies (compromised residential routers and web servers). Requests use HTTP/HTTPS POST methods or raw TLS sessions on ports 443, 995, 2222. Handshake employs hybrid cryptography: client generates random AES-128 key, encrypts telemetry (OS version, bot ID, process list), encrypts AES key with hardcoded RSA public key, and transmits binary envelope. C2 responds with signed executable modules.
06 | Verified Detection Signatures (YARA & Sigma)
rule CyberTrace_Qakbot_Pinkslipbot_Core {
meta:
description = "Detects Qakbot core decrypted DLL payloads and RCDATA decryption routines"
author = "CyberTrace Intelligence (@wgkgi0x0)"
reference = "TF-019"
date = "2026-10-29"
hash = "2f6e9c9a68a5dbcf5a452d3a3d2e1b8b6c4e09f87c53d109b83e4a2d7f8a1122"
strings:
// SHA1 key generation & RC4 KSA sequence in Qakbot
$rc4_sha1 = { 8D 45 ?? 50 8D 45 ?? 50 E8 ?? ?? ?? ?? 83 C4 08 85 C0 74 ?? 6A 00 6A 00 8D 45 ?? 50 }
// BriefLZ or LZNT1 decompress header signature check
$decomp = { 66 81 38 62 6C 75 ?? 83 C0 04 }
// Web inject / bot identification strings
$str1 = "ping.php" ascii
$str2 = "gate.php" ascii
$str3 = "webinjects" ascii wide nocase
condition:
uint16(0) == 0x5a4d and
($rc4_sha1 or $decomp or (2 of ($str*)))
}title: Qakbot Process Hollowing Execution via Rundll32 Ordinal Call
id: 5b6c7d8e-1234-4567-8901-abcdef123456
status: stable
description: Detects suspicious rundll32 execution invoking unnamed ordinal exports followed by anomalous child process spawning.
author: CyberTrace Intelligence (@wgkgi0x0)
date: 2026-10-29
references:
- https://cybertrace.io/threats/qakbot-whitepaper.html
logsource:
category: process_creation
product: windows
detection:
selection_rundll_ordinal:
Image|endswith: '\rundll32.exe'
CommandLine|contains:
- ',#1'
- ',#2'
- ',DllRegisterServer'
selection_hollowed_child:
ParentImage|endswith: '\rundll32.exe'
Image|endswith:
- '\wermgr.exe'
- '\mobsync.exe'
- '\explorer.exe'
condition: selection_rundll_ordinal or selection_hollowed_child
level: critical
tags:
- attack.execution
- attack.t1218.011
- attack.defense_evasion
- attack.t1055.01207 | Decompiled Artifacts & Observable IoCs
Indicators of compromise and forensic patterns recorded across laboratory triage:
08 | Forensic Visual Evidence & Disassembly Artifacts (3 Assets)
High-resolution reverse engineering captures, decompiler output, memory hex dumps, and C2 network streams archived locally in the CyberTrace laboratory. Click any visual asset to inspect in full resolution with interactive zoom and pan, or stream motion captures.
Forensic memory trace showing thread hijacking and man-in-the-browser banking credential interception.
Process monitor telemetry tracking hollowed process creation and memory section remapping.
Tailored forensic schematic mapping initial access, defense evasion, core capabilities, and Tiered Botnet, Compromised WordPress Sites, Custom TLS command infrastructure.
International CTI Indexing Summary (EN | RU | HI) Search Engine Knowledge Graph
Qakbot / QBot (Loader)
Veteran headless modular botnet engine featuring multi-tiered proxy infrastructure, in-memory resource decryption, process hollowing, and automated email thread hijacking.
C2 Architecture: Multi-tiered network architecture. Infected nodes communicate with Tier-1 proxies (compromised residential routers and web servers). Requests use HTTP/HTTPS POST methods or raw TLS sessions on ports 443, 995, 2222. Handshake employs hybrid cryptograp
Threat Hunting: YARA in-memory signatures, Sigma detection rules, and MITRE ATT&CK indicators. CyberTrace Intelligence Feed: @CyberTrace20 (@wgkgi0x0).
Анализ Qakbot / QBot (Loader)
Детальный технический анализ Qakbot / QBot — это Загрузчик вредоносного ПО (Дроппер/Стейджер), разработанный на стеке Microsoft Visual C++ (MSVC) x86/x64. В отчете подробно исследуются этапы скрытого внедрения в память (Process Injection), методы обхода EDR-систем, структура сетевых пакетов командного сервера (Custom binary protocol encapsulated in TLS / HTTP POST over TCP ports 443, 995, 2222) и механизмы кражи данных.
Архитектура C2: Шифрованный протокол обмена данными с использованием Custom binary protocol encapsulated in TLS / HTTP POST over TCP ports 443, 995, 2222, защита от сетевого перехвата и анализ маяков (Beacons).
Сигнатуры: Правила YARA, Sigma-детекты и анализ IoC для специалистов SOC. Оперативный канал: Telegram @CyberTrace20 (@wgkgi0x0).
Qakbot / QBot (Loader) विश्लेषण
Qakbot / QBot एक परिष्कृत मैलवेयर लोडर और ड्रॉपर पेलोड है जिसे Microsoft Visual C++ (MSVC) x86/x64 का उपयोग करके विकसित किया गया है। इस तकनीकी CTI विश्लेषण में मेमोरी इंजेक्शन तकनीक, EDR सुरक्षा बाईपास, कमांड और कंट्रोल सर्वर (Custom binary protocol encapsulated in TLS / HTTP POST over TCP ports 443, 995, 2222) संचार प्रोटोकॉल और डेटा चोरी तंत्र का पूर्ण विवरण दिया गया है।
C2 संचार: Custom binary protocol encapsulated in TLS / HTTP POST over TCP ports 443, 995, 2222 आधारित एन्क्रिप्टेड C2 इंफ्रास्ट्रक्चर और ऑटोमेटेड पेलोड रिट्रीवल चैनल।
सुरक्षा नियम: YARA नियम, Sigma व्यवहार विश्लेषण और MITRE ATT&CK संकेतक। साइबर इंटेलिजेंस अपडेट: Telegram @CyberTrace20 (@wgkgi0x0).