Malware1 associated actor

MARSSTEALER

Tracked since Mar 18, 2026 · Updated 7 months ago

Trending this weekNot trendingOutside this week’s top 100

Mention activity · 30 daysNo mention activity in the last 30 days.

Vulns0Associated

Actors1Associated

ATT&CK11Techniques

IOCs0Tracked

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Threat actors

Associated threat actors

1 distinct threat actor Mallory has associated with this family across public reporting. Open in Mallory to see the full evidence chain and overlapping campaigns.

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UAC-0041

У разі відкриття архіву та запуску EXE-файлу, комп'ютер буде уражено шкідливою програмою, яку, за сукупністю ознак (незважачи на деякі відмінності), класифіковано як MarsStealer. MarsStelaer - шкідлива програма-стілер, розроблена з використанням мов програмування C/ASM.

via cert uacert.gov.ua

MITRE ATT&CK

Techniques & procedures

11 distinct techniques documented for this family, organized by ATT&CK tactic.

Initial Access

3 techniques

T1566PhishingEvidence1

CERT-UA received information about mass distribution of emails with the subject "Нова програма для запису в журналi." The email text impersonates the Ministry of Education and Science of Ukraine and contains a link to a "program" plus an archive password.

T1566.001Spearphishing AttachmentEvidence1

...отримання несанкціонованого доступу до комп'ютерів бухгалтерів... наведено декілька прикладів ланцюгів інфікування... (LNK-файлу)... (RAR-архіву з паролем та VBS/BAT файлів) ... Документи.zip / Документи (СУД).rar / Платіжні документи.zip / ... .vbs / ... .bat / Документи.pdf.lnk

T1566.002Spearphishing LinkEvidence1

The email contains a message allegedly from the Ministry of Education and Science of Ukraine regarding "electronic educational journals", as well as a link to the "program" and a password for the archive.

Execution

2 techniques

T1059.005Visual BasicEvidence1

MarsStelaer - шкідлива програма-стілер, розроблена з використанням мов програмування C/ASM.

T1204User ExecutionEvidence1

У разі відкриття архіву та запуску EXE-файлу, комп'ютер буде уражено шкідливою програмою

Credential Access

2 techniques

T1555.003Credentials from Web BrowsersEvidence1

Основний функціонал - ... викрадення аутентифікаційних даних з Інтернет-браузерів

T1649Steal or Forge Authentication CertificatesEvidence1

Основний функціонал - ... викрадення аутентифікаційних даних ... плагінів крипто-гаманців, програм багатофакторної аутентифікації

Collection

3 techniques

T1005Data from Local SystemEvidence1

Основний функціонал - збір інформації про комп'ютер ... викрадення файлів

T1113Screen CaptureEvidence1

Основний функціонал - ... а також завантаження і запуск виконуваних файлів і виготовлення знімку екрану.

T1560Archive Collected DataEvidence1

The email provides ... a password for the archive. If the archive is opened and the EXE file launched, the computer will be infected.

Command and Control

1 technique

T1105Ingress Tool TransferEvidence1

Network indicators include download URLs such as hXXps://drive.google[.]com/... and hXXps://api.dev-com[.]sc/files_1/v_5.1.9.exe and .../v_5.1.9.zip.

Activity feed

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

View more in app →

bleeping computerNews · Mar 31, 2022New BlackGuard password-stealing malware sold on hacker forumsMentioned in passing as a dominant information stealer.Read more ↗cert uaNews · Mar 30, 2022CERT-UAInformation-stealing malware written in C/ASM that collects system information, steals authentication data from web browsers, crypto-wallet plugins, and multi-factor authentication applications, steals files, can download and execute additional files, and take screenshots.Read more ↗

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IOC matchingMatch every observed IP, domain, and hash against your live telemetry.

Associated threat actors1Groups linked to this family, with evidence pinned to each claim.

Associated vulnerabilitiesCVEs linked to this family, with the reporting behind each link.

Detection signaturesYARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping11Every documented technique, ranked by evidence weight.

Researcher chatterReddit, Mastodon, and CTI community discussion around this family.

MARSSTEALER

Tracked since Mar 18, 2026 · Updated 7 months ago

Trending this weekNot trendingOutside this week’s top 100

Mention activity · 30 daysNo mention activity in the last 30 days.

Vulns0Associated

Actors1Associated

ATT&CK11Techniques

IOCs0Tracked

Is this in your environment?See whether this family's indicators match your telemetry and which of your assets are exposed to the CVEs associated with it.

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