Malware

3LOSH crypter

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

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

Initial Access

1 technique

T1566PhishingEvidence1

Ongoing malware distribution campaigns are using ISO disk images to deliver AsyncRAT, LimeRAT and other commodity malware to victims.

Execution

4 techniques

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

T1059.001PowerShellEvidence1

As expected, the retrieved content is a PowerShell script passed to the Invoke-Expression (IEX) cmdlet and executed to continue the infection process.

T1059.005Visual BasicEvidence1

The infection process begins with an ISO that contains a malicious VBScript that, when executed, initiates a multi-stage infection process.

T1204.002Malicious FileEvidence1

The infection process begins with an ISO that contains a malicious VBScript that, when executed, initiates a multi-stage infection process.

Persistence

1 technique

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

Privilege Escalation

1 technique

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

Stealth

2 techniques

T1027Obfuscated Files or InformationEvidence1

The VBS contains junk data and uses string replacement to attempt to obfuscate the executed code.

T1218System Binary Proxy ExecutionEvidence1

This is accomplished by invoking aspnet_compiler.exe, injecting the final payload, and executing it.

Command and Control

1 technique

T1105Ingress Tool TransferEvidence1

It retrieves and executes the next stage from an attacker-controlled server.

INDICATORS OF COMPROMISE

IOCs tracked for this family

96 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.

View more in app

Network

18 tracked

IPs, domains, and DNS infrastructure linked to this family.

Hashes

78 tracked

File hashes (MD5, SHA-1, SHA-256) from samples and reports.

TypeValueLatest sighting

domain●●●●●●●●●●●●View more in app3 months ago

domain●●●●●●●●●●●●View more in app9 months ago

hash.sha256●●●●●●●●●●●●View more in app4 years ago

ACTIVITY FEED

Recent activity

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

1 SOURCESView more in app

talosintelligence otherNews

Apr 5, 2022

Threat Spotlight: AsyncRAT campaigns feature new version of 3LOSH crypter

A crypter/builder used to obfuscate RAT payloads and facilitate the multi-stage infection chain, including embedded compressed payloads and script-based execution components designed to evade detection.

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.

Start free trial

IOC matching96

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 mapping8

Every documented technique, ranked by evidence weight.

Researcher chatter

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

Back to malware

Malware

3LOSH crypter

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

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

Initial Access

1 technique

T1566PhishingEvidence1

Ongoing malware distribution campaigns are using ISO disk images to deliver AsyncRAT, LimeRAT and other commodity malware to victims.

Execution

4 techniques

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

T1059.001PowerShellEvidence1

As expected, the retrieved content is a PowerShell script passed to the Invoke-Expression (IEX) cmdlet and executed to continue the infection process.

T1059.005Visual BasicEvidence1

The infection process begins with an ISO that contains a malicious VBScript that, when executed, initiates a multi-stage infection process.

T1204.002Malicious FileEvidence1

The infection process begins with an ISO that contains a malicious VBScript that, when executed, initiates a multi-stage infection process.

Persistence

1 technique

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

Privilege Escalation

1 technique

T1053.005Scheduled TaskEvidence1

The next PowerShell script attempts to achieve persistence by creating a new Scheduled Task called "Office" that is executed immediately and then repeated every two minutes

Stealth

2 techniques

T1027Obfuscated Files or InformationEvidence1

The VBS contains junk data and uses string replacement to attempt to obfuscate the executed code.

T1218System Binary Proxy ExecutionEvidence1

This is accomplished by invoking aspnet_compiler.exe, injecting the final payload, and executing it.

Command and Control

1 technique

T1105Ingress Tool TransferEvidence1

It retrieves and executes the next stage from an attacker-controlled server.

INDICATORS OF COMPROMISE

IOCs tracked for this family

96 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.

View more in app

Network

18 tracked

IPs, domains, and DNS infrastructure linked to this family.

Hashes

78 tracked

File hashes (MD5, SHA-1, SHA-256) from samples and reports.

TypeValueLatest sighting

domain●●●●●●●●●●●●View more in app3 months ago

domain●●●●●●●●●●●●View more in app9 months ago

hash.sha256●●●●●●●●●●●●View more in app4 years ago

ACTIVITY FEED

Recent activity

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

1 SOURCESView more in app

talosintelligence otherNews

Apr 5, 2022

Threat Spotlight: AsyncRAT campaigns feature new version of 3LOSH crypter

What this page doesn’t show

The version that knows your environment.

Start free trial

IOC matching96

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 mapping8

Every documented technique, ranked by evidence weight.

Researcher chatter

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