T1587.001 Malware

Technique

T1587.001

Tactics

Resource Development

Research, 90 days

4

KEV CVEs mapped

0

SigmaHQ rules

11

Elastic, Splunk

1

thrunt rules

0

Upstream

https://attack.mitre.org/techniques/T1587/001

MITRE description

Adversaries may develop malware and malware components that can be used during targeting. Building malicious software can include the development of payloads, droppers, post-compromise tools, backdoors (including backdoored images), packers, C2 protocols, and the creation of infected removable media. Adversaries may develop malware to support their operations, creating a means for maintaining control of remote machines, evading defenses, and executing post-compromise behaviors.(Citation: Mandiant APT1)(Citation: Kaspersky Sofacy)(Citation: ActiveMalwareEnergy)(Citation: FBI Flash FIN7 USB) During malware development, adversaries may intentionally include indicators aligned with other known actors in order to mislead attribution by defenders.(Citation: Olympic Destroyer)(Citation: Risky Bulletin Threat actor impersonates FSB APT)(Citation: GamaCopy organization) As with legitimate development efforts, different skill sets may be required for developing malware. The skills needed may be located in-house, or may need to be contracted out. Use of a contractor may be considered an extension of that adversary's malware development capabilities, provided the adversary plays a role in shaping requirements and maintains a degree of exclusivity to the malware. Some aspects of malware development, such as C2 protocol development, may require adversaries to obtain additional infrastructure. For example, malware developed that will communicate with Twitter for C2, may require use of [Web Services](https://attack.mitre.org/techniques/T1583/006).(Citation: FireEye APT29)

Research citing this technique

Reports and advisories from the last 90 days that cite this technique.

• 2026-11-03 ESET: Gorbag: Orcs at the border harvesting intelligence from Ukraine
• 2026-10-08 ESET: MATCHBOIL: New tricks, same old evil intentions
• 2026-09-17 ESET: Beware the SparroWock: The backdoor that bites, the commands that catch
• 2026-08-13 Recorded Future Insikt: Malware Crypting Services and the Threat Actors Who Sell Them

Detection coverage

SigmaHQ community rules

• Formbook Process Creation (emerging-threats)
• Mustang Panda Dropper (emerging-threats)
• Conti Volume Shadow Listing (emerging-threats)
• Creation of an Executable by an Executable (threat-hunting)
• ProxyLogon MSExchange OabVirtualDirectory (core)
• Uncommon File Created In Office Startup Folder (core)
• VHD Image Download Via Browser (core)
• PUA - CsExec Execution (core)
• PsExec/PAExec Escalation to LOCAL SYSTEM (core)
• Potential PsExec Remote Execution (core)
• Potential Privilege Escalation To LOCAL SYSTEM (core)

Elastic and Splunk rules

• GenAI Process Compiling or Generating Executables (elastic)

Signal counts reflect the current corpus snapshot. Research citations are the technique IDs named in vendor reports and government advisories from the last 90 days; KEV mappings come from MITRE CTID. Coverage is the SigmaHQ rule inventory (core, emerging-threats, threat-hunting) at release r2026-07-01 plus Elastic and Splunk production rules. Rule bodies are not mirrored; links go upstream.