Where can I learn more about wapomi?

Refer to the linked MITRE ATT&CK technique pages, which document the behaviors associated with this family.

Wapomi Malware Family: IOCs, Detection, MITRE ATT&CK, Response

Overview

Executive Summary

Wapomi is a destructive File Infector (parasitic virus) and worm that was highly prevalent in the late 2000s and early 2010s. Unlike modern Trojans that simply drop a payload, Wapomi physically alters existing executable files (`.exe`, `.dll`) on the infected host, appending its malicious code to them. Its primary objective is aggressive self-replication across local drives, network shares, and removable media, often causing widespread system corruption and instability.

Infection Vector and Technical Capabilities

Wapomi spreads rapidly without requiring active human interaction once introduced to an environment. The initial infection usually occurs via an infected USB drive, a malicious email attachment, or by executing a file downloaded from an untrusted P2P network. Its technical core relies on aggressive modification and propagation:

Executable Appending (File Infection): When Wapomi runs, it aggressively scans the hard drive for executable files. It injects its malicious assembly code into the target file's PE (Portable Executable) header and entry point. When a user later runs the "clean" application, the virus executes first.
Worm Propagation: Wapomi actively seeks out mapped network drives (SMB shares) and removable USB drives. It copies an infected executable to these drives and often creates an `autorun.inf` file, ensuring the virus automatically executes if the drive is plugged into another vulnerable machine.
System Instability: Because file infection is a delicate, binary-level operation, Wapomi's aggressive appending often corrupts the target executables. This leads to frequent application crashes, system instability, and the inability to launch legitimate software.

Threat Assessment

A Wapomi infection is a highly disruptive event. While it may not explicitly steal data, its rapid propagation via network shares can quickly paralyze an entire corporate network, corrupting thousands of legitimate files and requiring massive remediation efforts.

Incident Response and Remediation

Immediate Network Severance: Infected machines must be isolated from the network *immediately* to halt the worm's spread across SMB shares. Disable USB port access across the organization temporarily via Group Policy.
Aggressive File Disinfection: Standard file deletion is not an option, as it would destroy legitimate corporate applications. Enterprise antivirus must be utilized in "Disinfect" mode, attempting to carefully strip the viral code out of the infected executables and repair the original PE headers.
Mass Restoration: In severe cases of widespread corruption, disinfection may fail. IT teams must be prepared to wipe infected machines and restore applications and user files from clean, offline backups.

Generated Detections (Boilerplate)

These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.

YARA Rule

rule MALWARE_WIN_WAPOMI {
    meta:
        description = "Detects Wapomi (worm_banker)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "wapomi" ascii wide nocase
        $s2 = "virus.wapomi" ascii wide nocase
        $s3 = "w32.wapomi" ascii wide nocase
        $s4 = "pe_wapomi" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Wapomi Activity
id: bf1e1be38d8cdfb39e70ec8f0a8856e9
status: experimental
description: Detects generic indicators of the wapomi malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*wapomi*"
            - "*virus.wapomi*"
            - "*w32.wapomi*"
            - "*pe_wapomi*"
    condition: selection
level: medium

Wapomi

Overview

Executive Summary

Infection Vector and Technical Capabilities

Threat Assessment

Incident Response and Remediation

Known aliases

MITRE ATT&CK Techniques

Generated Detections (Boilerplate)

YARA Rule

Sigma Rule

References & External Analysis

Frequently Asked Questions

Related Families (Category: worm_banker)

Machine-readable

Ecosystem & Interactive Environments