Attor
MITRE ATT&CK: S0438 View on attack.mitre.org
Aliases: Attor
- First seen
- 2013-01-01 00:00:00
- Malware type
- spyware, backdoor
- Family
- Malware family
- Operating systems
- windows
- Related IoCs
- 3 (3 malicious)
- Last IoC activity
- 2026-08-30 12:57:17
- Profile updated
- 2026-07-07 12:57:29
Targeted industries: government-and-public-sector technology-and-telecommunications
Context
Attor is a Windows-based espionage platform that has been seen in use since 2013. Attor has a loadable plugin architecture to customize functionality for specific targets.
Recent IoC activity
3 malicious indicators in Maltiverse are attributed to Attor (S0438). The 3 most recently updated:
| Type | Indicator | Updated | Sources |
|---|---|---|---|
| file sample | Rsvp_invite%23903388.exe | 2026-08-30 | 3 |
| file sample | rsvp_invites%235699.exe | 2026-08-22 | 4 |
| file sample | Acrobat-Reader.exe | 2026-07-18 | 3 |
Detection coverage
- 1 YARA rules
- 432 Sigma rules
Malware & tools used
- Archive via Custom Method (attack-pattern)
- Application Window Discovery (attack-pattern)
- Symmetric Cryptography (attack-pattern)
- Masquerade Task or Service (attack-pattern)
- System Checks (attack-pattern)
- Multi-hop Proxy (attack-pattern)
- Logon Script (Windows) (attack-pattern)
- Rundll32 (attack-pattern)
- Clipboard Data (attack-pattern)
- Asymmetric Cryptography (attack-pattern)
- Ingress Tool Transfer (attack-pattern)
- Local Data Staging (attack-pattern)
- Peripheral Device Discovery (attack-pattern)
- Modify Registry (attack-pattern)
- Screen Capture (attack-pattern)
- Exfiltration Over C2 Channel (attack-pattern)
- Shared Modules (attack-pattern)
- Windows Service (attack-pattern)
- Encrypted/Encoded File (attack-pattern)
- File Transfer Protocols (attack-pattern)
- Automated Collection (attack-pattern)
- Scheduled Task (attack-pattern)
- Timestomp (attack-pattern)
- Process Injection (attack-pattern)
- Keylogging (attack-pattern)
Detection rules
- MALPEDIA_Win_Attor_Auto (yara-rule)
Reports & references
- ESET — Eset Discovers Attor Spy Platform (report)
- cocomelonc.github.io — Malware Pers 4 (report)
- malpedia.caad.fkie.fraunhofer.de — Win.Attor (report)
- cocomelonc.github.io — Malware Pers 20 (report)
- safe.cnews.ru — 2019 10 11 Za Rossijskimi Diplomatami (report)
- ESET — Eset Attor (report)
- unian.ua — 10717107 Mizhnarodna It Kompaniya Poperedzhaye Pro Nizku Shpigunskih Atak Na Uryadovi Ta Diplomatichni Ustanovi Shidnoji Yevropi (report)
- zdnet.com — New Espionage Malware Found Targeting Russian Speaking Users In Eastern Europe (report)
- threatpost.com — 149095 (report)
- MITRE ATT&CK — S0438 (report)