Malware

Mail PassView

For your environment

Hunt this family in your stack

Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

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MITRE ATT&CK

Techniques & procedures

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

Privilege Escalation

1 technique

T1055Process InjectionEvidence1

They are extracted, injected into another executable and run once to steal the victim’s passwords, which are then exfiltrated to the C&C server.

Stealth

1 technique

T1055Process InjectionEvidence1

They are extracted, injected into another executable and run once to steal the victim’s passwords, which are then exfiltrated to the C&C server.

Credential Access

6 techniques

T1552.001Credentials In FilesEvidence1

Unsecured Credentials: Credentials In Files OldGremlin extracted email passwords via NirSoft Mail PassView.

T1555Credentials from Password StoresEvidence11

Mail PassView is a small password-recovery tool that reveals the passwords and other account details for the following email clients... For each email account, the following fields are displayed: Account Name, Application, Email, Server, Server Type (POP3/IMAP/SMTP), User Name, and the Password.

T1555.001KeychainEvidence2

It also steals email contacts from desktop email clients like Outlook, TheBat, Thunderbird, Apple Mail and others.

T1555.003Credentials from Web BrowsersEvidence1

Gmail - If the password is saved by Gmail Notifier application, Google Desktop, or by Google Talk.

T1555.005Password ManagersEvidence2

Going through its code and constant strings, we learned it could obtain email account settings and credentials from the following email clients or other clients that could save email credentials

T1649Steal or Forge Authentication CertificatesEvidence1

Emotet modules focus on credential theft, email theft, and spamming.

Discovery

1 technique

T1012Query RegistryEvidence1

It collects the settings and credentials from both the system registry and the local configuration files of these email clients.

Collection

1 technique

T1560Archive Collected DataEvidence1

Added an option to export the passwords into KeePass csv file... You can now send the email passwords list to stdout by specifying an empty filename ("") in the command-line...

Command and Control

1 technique

T1105Ingress Tool TransferEvidence1

Early versions of the malware could receive a command to download a file and execute it.

ACTIVITY FEED

Recent activity

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

2 SOURCESView more in app

fortinet threat researchNews

Mar 23, 2022

MS Office Files Involved Again in Recent Emotet Trojan Campaign - Part II | FortiGuard Labs

A NirSoft email password recovery utility abused by this Emotet module to steal email account settings and credentials from email clients and related registry/configuration sources.

jpcert jpNews

Mar 18, 2026

Credential recovery utility used to extract saved email account credentials from supported mail client profiles/settings on a Windows host.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets match these IOCs, which detections are missing, which campaigns to expect next, and what to do in the next 30 minutes.

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IOC matching

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

Threat actor attribution

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

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

MITRE ATT&CK mapping10

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.

Back to malware

Malware

Mail PassView

For your environment

Hunt this family in your stack

Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

Start free trial

MITRE ATT&CK

Techniques & procedures

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

Privilege Escalation

1 technique

T1055Process InjectionEvidence1

They are extracted, injected into another executable and run once to steal the victim’s passwords, which are then exfiltrated to the C&C server.

Stealth

1 technique

T1055Process InjectionEvidence1

They are extracted, injected into another executable and run once to steal the victim’s passwords, which are then exfiltrated to the C&C server.

Credential Access

6 techniques

T1552.001Credentials In FilesEvidence1

Unsecured Credentials: Credentials In Files OldGremlin extracted email passwords via NirSoft Mail PassView.

T1555Credentials from Password StoresEvidence11

T1555.001KeychainEvidence2

It also steals email contacts from desktop email clients like Outlook, TheBat, Thunderbird, Apple Mail and others.

T1555.003Credentials from Web BrowsersEvidence1

Gmail - If the password is saved by Gmail Notifier application, Google Desktop, or by Google Talk.

T1555.005Password ManagersEvidence2

Going through its code and constant strings, we learned it could obtain email account settings and credentials from the following email clients or other clients that could save email credentials

T1649Steal or Forge Authentication CertificatesEvidence1

Emotet modules focus on credential theft, email theft, and spamming.

Discovery

1 technique

T1012Query RegistryEvidence1

It collects the settings and credentials from both the system registry and the local configuration files of these email clients.

Collection

1 technique

T1560Archive Collected DataEvidence1

Added an option to export the passwords into KeePass csv file... You can now send the email passwords list to stdout by specifying an empty filename ("") in the command-line...

Command and Control

1 technique

T1105Ingress Tool TransferEvidence1

Early versions of the malware could receive a command to download a file and execute it.

ACTIVITY FEED

Recent activity

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

2 SOURCESView more in app

fortinet threat researchNews

Mar 23, 2022

MS Office Files Involved Again in Recent Emotet Trojan Campaign - Part II | FortiGuard Labs

A NirSoft email password recovery utility abused by this Emotet module to steal email account settings and credentials from email clients and related registry/configuration sources.

jpcert jpNews

Mar 18, 2026

Credential recovery utility used to extract saved email account credentials from supported mail client profiles/settings on a Windows host.

What this page doesn’t show

The version that knows your environment.

Start free trial

IOC matching

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

Threat actor attribution

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

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

MITRE ATT&CK mapping10

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.