Bumblebee can capture and compress stolen credentials from the Registry and volume shadow copies.4
tool
Bumblebee S1039
- Type
- malware
- Platform
- Windows
- Created
- 19 August 2022
- Last modified
- 17 September 2024
Bumblebee is a custom loader written in C++ that has been used by multiple threat actors, including possible initial access brokers, to download and execute additional payloads since at least March 2022. Bumblebee has been linked to ransomware operations including Conti, Quantum, and Mountlocker and derived its name from the appearance of "bumblebee" in the user-agent.[1][2][3]
39
TechniquesTop 3%
9
TacticsTop 11%
2
Threat groupsunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S1039
Bumblebee can use backup C2 servers if the primary server fails.5
Bumblebee has been delivered as password-protected zipped ISO files and used control-flow-flattening to obfuscate the flow of functions.789
Bumblebee has named component DLLs "RapportGP.dll" to match those used by the security company Trusteer.11
Standing S1039
Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
Techniques39Top 3%
97th percentile · 97% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics9Top 11%
89th percentile · 89% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups261% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique17med40th pct
40th percentile · 60% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3med
Detection coverage S1039
1256 distinct rules cover the 39 techniques recorded for this tool. The 1501 technique-to-rule mappings resolve to 1256 distinct rules, because one rule can cover several techniques. 857 Sigma · 399 Splunk.
38 covered by at least one rule1 with no coverage1256 distinct rules in total
tf
Loading...Drag headers to reorder | Drag edges to resize
tf
Loading detections...
| Select | Title | Description | Category | Status | Event | Product | MITRE ATT&CK | CVEs | Severity | Author | Created | Updated | ID | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
© 2026 The MITRE Corporation. ATT&CK® and D3FEND™ data reproduced with permission. SigmaHQ detection rules licensed under DRL 1.1. attack.mitre.org · d3fend.mitre.org · CAR analytics licensed under Apache 2.0 · car.mitre.org