BendyBear has used byte randomization to obscure its behavior.2
tool
BendyBear S0574
- Type
- malware
- Platform
- Windows
- Created
- 16 February 2021
- Last modified
- 11 April 2024
BendyBear is an x64 shellcode for a stage-zero implant designed to download malware from a C2 server. First discovered in August 2020, BendyBear shares a variety of features with Waterbear, malware previously attributed to the Chinese cyber espionage group BlackTech.[1]
11
Techniques51st pct
4
Tactics32nd pct
0
Threat groupsNone recorded
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0574
BendyBear can query the host's Registry key at HKEY_CURRENT_USER\Console\QuickEdit to retrieve data.3
BendyBear changes its runtime footprint during code execution to evade signature-based defenses.5
BendyBear is designed to download an implant from a C2 server.6
BendyBear can load and execute modules and Windows Application Programming (API) calls using standard shellcode API hashing.7
Standing S0574
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
Techniques1151st pct
51st percentile · 51% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics432nd pct
32nd percentile · 68% of 825 ATT&CK software entries have more tactics spanned.
Threat groups061% 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 / technique4medBottom 4%
4th percentile · 96% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3med
Detection coverage S0574
206 distinct rules cover the 11 techniques recorded for this tool. The 208 technique-to-rule mappings resolve to 206 distinct rules, because one rule can cover several techniques. 142 Sigma · 64 Splunk.
8 covered by at least one rule3 with no coverage206 distinct rules in total
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