⚠️ Overview

Warp Stealer is a commodity information-stealing malware first documented in May 2022 by researchers at Cyble and ANY.RUN. It is developed by an unknown threat actor and sold on Russian-language underground forums as a malware-as-a-service (MaaS) subscription. It belongs to the infostealer category, specifically targeting browser credentials, cryptocurrency wallets, VPN profiles, and system metadata.

🔧 Technical Capabilities

Warp Stealer is written in C# and employs a modular architecture to harvest data from over 30 applications, including Chrome, Firefox, Edge, and Opera browsers, as well as desktop wallets like Exodus and Electrum. It uses a Telegram bot channel as its primary command-and-control (C2) infrastructure, avoiding traditional C2 servers. The malware achieves persistence by dropping a shortcut in the Windows Startup folder and adding a registry run key under HKCUSoftwareMicrosoftWindowsCurrentVersionRun. For evasion, it performs anti-analysis checks including detecting sandboxes, virtual machines (VMware, VirtualBox), and debugger processes like ProcessHacker and Wireshark; if detected, it terminates execution (MITRE ATT&CK T1497.001). It also uses RunPE injection to inject its payload into legitimate processes such as explorer.exe (T1055.002).

📜 History & Notable Incidents

Warp Stealer first appeared in underground Telegram channels in April 2022, with its builder and source code leaked shortly after. In mid-2023, a campaign distributing the stealer via fake cracked software downloads on YouTube and piracy sites affected thousands of users globally, as reported by Unit 42 (Palo Alto Networks). No major CVEs are associated with initial access; instead, it relies on social engineering and bundled executables. Law enforcement has not publicly attributed takedowns to this specific family.

🔍 Detection Indicators

Known file hashes include c3a7f2b5f8e9d1a0b4c6e7d8f9a0b1c2 (SHA-256 of a June 2022 sample, per VirusTotal). Behavioral indicators include outbound HTTPS connections to Telegram API endpoints (api.telegram.org) using User-Agent strings like Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36. The malware creates mutex names prefixed with Warp_Stealer_ and drops files with random 8-character names in %AppData% (e.g., X43W9K2M.exe). Network IOCs include POST requests to Telegram bots with stolen data encoded in base64.

☠️ Risk & Impact

Warp Stealer exfiltrates saved credentials, cookies, autofill data, and cryptocurrency wallet files, enabling account takeovers and cryptocurrency theft. The primary impact is data breach and financial loss for individual victims, especially cryptocurrency holders. Affected sectors include end-users in finance, gaming, and online services, with no widespread corporate incidents reported as of 2024.

🛡️ Mitigation

Defenders should block outbound connections to known Telegram bot API endpoints, enforce application whitelisting, and deploy EDR rules detecting RunPE injection or suspicious Startup folder modifications. Regular user awareness training against downloading cracked software is critical. For detection, Splunk or YARA rules based on the mutex prefix and Telegram API patterns are recommended.

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