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3 malware families

TA579

Also known asTA579

TA579 is a cybercriminal threat actor tracked by Proofpoint since August 2021. Proofpoint attributed a March 2022 DocuSign-themed Bumblebee campaign to TA579 with high confidence. The actor previously delivered BazaLoader and IcedID in past campaigns. In the observed Bumblebee activity, TA579 used email lures including DocuSign branding that led victims to zipped ISO files hosted on OneDrive, as well as HTML attachments masquerading as unpaid invoices. Proofpoint reported the HTML attachment chain used a redirect service it calls Cookie Reloaded, which in turn used Prometheus TDS to filter downloads based on time zone and cookies. The malicious ISO contained a LNK file and DLL, with the LNK executing the DLL via rundll32 to launch Bumblebee. The content also notes that TA579 campaign IDs supported a previously suspected relationship distributing for another threat actor. Known alias in the provided content: TA579.

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MITRE ATT&CK

Tradecraft

6 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.

3 of 15 tactics9 techniques×N= number of intelligence reports citing this technique
MITRE ATT&CK
TA0001
Initial Access
1 technique
T1566
Phishing
T1566.001
Spearphishing Attachment
T1566.002
Spearphishing Link
TA0002
Execution
2 techniques
T1059
Command and Scripting Interpreter
T1059.003
Windows Command Shell
T1204
User Execution
T1204.002
Malicious File
TA0005
Stealth
1 technique
T1218
System Binary Proxy Execution
T1218.011
Rundll32
ARSENAL

Associated malware families

3 malware families attributed to this actor across reporting.

FamilyContextEvidenceLast seen
IcedIDProofpoint has tracked a new malware loader called Bumblebee used by multiple crimeware threat actors previously observed delivering BazaLoader and IcedID.2May 31, 2026
BazarBazaLoader is a first stage downloader first identified in 2020 that has been associated with follow-on ransomware campaigns including Conti.1May 31, 2026
BumblebeeStarting in March 2022, Proofpoint observed campaigns delivering a new downloader called Bumblebee. ... Bumblebee's objective is to download and execute additional payloads. Proofpoint researchers observed Bumblebee dropping Cobalt Strike, shellcode, Sliver and Meterpreter.1May 31, 2026
ACTIVITY FEED

Recent activity

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

3 SOURCESView more in app
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Target overlap

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Tradecraft mapping6

Every observed MITRE ATT&CK technique, grouped by tactic.

Malware arsenal3

Families this actor is known to deploy, with IOCs and behavior.

Exploited CVEs

CVEs this actor has used in known campaigns.

Detection signatures

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

Observables

Domains, IPs, and hashes tied to this actor, refreshed continuously.